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VARIATIONS OF MOISTURE ABSORPITION AND MECHANICAL PROPERTIES OF DIFFERENT COMPOSITES WITH IMMERSION TIME IN WATER Lei, W., S. C. Q., X. Y. Fiber Reinforced Plastics/Composites    2009, 205 (6): 19-24.   Abstract （4672）      PDF （1277KB）（2247）       Knowledge map    Save Unsaturated polyester resin(UPR) is used as matrix， glass fiber cloth， ramie fiber cloth and/or basic magnesium sulfated whisker are used as reinforcement to form composites by compression molding process.The variations of moisture absorption and mechanical properties of different composites with immersion time in water at 30℃ and 50℃ respectively were studied. The results show that， the water uptakes of all the composites increase with immersion time in water， the composites absorb water much fast from 0h to 8h， then relaxedly or unchanged.The water uptakes at 50℃ are always more than those at 30℃|the reinforcement of glass fiber cloth on UPR is far better than ramie cloth| hybrid with whisker will decrease the tensile and impact strengths of the composites containing either glass cloth or ramie cloth， but increase their flexural strengths and tensile moduli. With the prolong of immersion time in water， the tensile strengths of the composites reinforced with glass cloth along or glass cloth and whisker together at 30℃ and 50℃ will decrease| the impact strengths of the composites reinforced with ramie cloth reach the maxima of 49.1kJ/m2  and 48.8 kJ/m2 at 30℃ and 50℃ respectively when immersed in water for 16h， accordingly 98.78% and 97.57% increased from those before immersion， and the impact strengths of the composites reinforced with the hybrid of ramie cloth and whisker increase monotonously with time at the two temperatures through the whole water immersion test. Reference | Related Articles | Metrics

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ADVANCES OF NONDESTRUCTIVE TESTING OF COMPOSITE MATERIALS Ge, B., Yang, T., Gao, D. B., Li, M. Fiber Reinforced Plastics/Composites    2009, 205 (6): 67-71.   Abstract （4283）      PDF （873KB）（4884）       Knowledge map    Save Detected composite materials technology plays an important role in the production and application of composite materials. This article describes different methods of the detection of composite materials at home and abroad， including the traditional methods as detection technology of sound， light， electromagnetic waves and new detection techniques that relatively rapid developed in recent years， briefly elaborates the signal processing methods in detect the process of composite materials. Reference | Related Articles | Metrics

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THE FATIGUE ANALYSIS OF UAV COMPOSITE WING BASED ON ANSYS/FESAFE Jiang, N. C., Xie, Q. W., Dai, Y., Zhang, Z. Q. Fiber Reinforced Plastics/Composites    2009, 205 (6): 3-4.   Abstract （3918）      PDF （784KB）（2637）       Knowledge map    Save The static strength of UAV composite wing has been computed. Meanwhile， the fatigue life of UAV composite wing has been analyzed based on ANSYS/FESAFE software. The rainflow method and fatigue damage cumulative theory have been applied to the formation of load spectrum. Further more， a new way of computing fatigue life of UAV composite wing has been provided. Reference | Related Articles | Metrics

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EXPERIMENTAL RESEARCH ON STRENGTH AND SIZE EFFECTION OF CIRCULAR CONCRETE COLUMNS REINFORCED BY BFRP SONG Gong-He, ZHANG Hai-Hun Fiber Reinforced Plastics/Composites    2009, 209 (4): 3-5.   Abstract （3845）      PDF （398KB）（1476）       Knowledge map    Save Based on a test of circular concrete columns of different sizes confined by BFRP under uniaxial load,the mechanics properties and size effection of specimens were studied and axial compressing strength model of specimens was presented. The results suggest that the model has a good degree of agreement with experimental datas and circular concrete columns of different sizes exist size effection. Reference | Related Articles | Metrics

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THE SOLUTION FOR ADVERSE IMPACT OF CARBONATION ON CONCRETE BRIDGE DECK SLABS BT USING GFRP REINFORCEMENT ZHENG Yu, QIN Fu-Quan, LI Chun-Gong Fiber Reinforced Plastics/Composites    2009, 209 (4): 53-58.   Abstract （3649）      PDF （805KB）（1332）       Knowledge map    Save As crucial structural components in bridge structures, bridge deck slabs played an important role in integral structural behaviours and transportation. However, with the increasing of ages in services, the durability of reinforced concrete bridge deck slabs was influenced significantly by carbonation. Recently, because of high strength, light weight and strong corrosionresistance, glass fiber polymer reinforcement bars (GFRP bars) were accepted by civil engineers. Due to the existence of compressive membrane action, it was shown that the structural behaviours of GFRP reinforced concrete bridge deck slabs with same reinforcement percentage were similar as those of steel reinforced concrete bridge deck slabs in nonlinear finite element analysis. Based on numerical analysis results, GFRP is available to be used as replacement of steel reinforcement. According the analysis of mechanism of concrete carbonation and material properties of GFRP, it was found that the durability of GFRP reinforced concrete bridge deck slabs was enhanced after the occurrence of carbonation in concrete structures, because carbonation reduced the permeability and porosity of concrete. Reference | Related Articles | Metrics

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EXPERIMENTAL STUDY ON FLEXURAL STRENGTHENING OF RC BEAMS WITH NEAR SURFACE MOUNTED CFRP DING E-Gong, ZHANG Chun-Sheng, CENG Xian-Tao Fiber Reinforced Plastics/Composites    2009, 209 (4): 17-20.   Abstract （3612）      PDF （496KB）（1408）       Knowledge map    Save This paper presents research on four beams strengthened with CFRP bonded in sawed grooves in the concrete cover under monotonous loads. The firstcrack load, steelyielding load, ultimate load at failure and deformation are systematically studied. Test results indicate that the strengthening method could overcome the problems with peeling of the strengthening material when surface bonded FRP laminates, and exhibites higher ultimate load compard with nonstrengthened beams, which shows that the ultimate load could be increased by 81.89％, and the space between cracks is smaller, the number of cracks is more, the width of cracks is smaller, as well as the deformation capacity is larger,but it shows no effect on cracking load and yield load . The construction of the method is simple. So, this new strengthened method is an efficient method . Reference | Related Articles | Metrics

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STRUCTURAL ANALYSIS AND LAMINATION OPTIMUM DESIGN OF  WIND TURBINE ROTOR BLADE Li, C. L., C. C. Fiber Reinforced Plastics/Composites    2009, 205 (6): 50-53.   Abstract （3576）      PDF （1063KB）（2664）       Knowledge map    Save Structural analysis of wind turbine blade is an important part in the process of blade design. Structural dynamics and statics analysis are performed for 750kW blade with finite element method in this paper, lamination has been optimum designed on the basis of analysis. Compare with the results of structural analysis before and after optimization, the effectiveness and reliability of structural optimization has been proved, it has some reference value for the largerscale wind turbine blade on structural analysis and lamination optimum design. Reference | Related Articles | Metrics

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STUDY ON THE PREPARATION AND MECHANICAL PROPERTIES OF  CARBON FIBER REINFORCED CEMENT COMPOSITES Zheng, Z. Q., Yu, Y., Yan, X. Fiber Reinforced Plastics/Composites    2009, 205 (6): 31-34.   Abstract （3527）      PDF （785KB）（1981）       Knowledge map    Save Sodium Carbonxymethyl Cellulose (CMC) and Fine Silicon Fumes (SF) were used as composite dispersants of PAN based carbon fiber for fabricating carbon fiber reinforced cement composites (CFRCC) in this paper. The effect of the mixture ratio of composite dispersant on the mechanical properties of CFRCC and the relationship between mechanical properties and the content of carbon fiber as well as water cement ratio were studied. The results showed that it was a good way for the dispersion of carbon fiber， it was found that the flexural strength and compressive strength of CFRCC could be improved by 31.22% and 41.25% in 7 days respectively， when the content of carbon fiber in cement was 1%， CMC and fine silicon fumes were 0.05% and 15%， the watercement ratio was 0.3 to 0.32. Reference | Related Articles | Metrics

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APPLICATIONS AND DEVELOPMENT OF COMPOSITES IN RAILWAY TRANSPORTATION Jiang, J. H., Chen, J. J. Fiber Reinforced Plastics/Composites    2009, 205 (6): 81-85.   Abstract （3505）      PDF （837KB）（2880）       Knowledge map    Save The paper estimated main properties of composites，introduced the applications and development in railway transportation at home and abroad. Reference | Related Articles | Metrics

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LOCAL BUCKLING ANALYSIS FOR LAMINATED COMPOSITE PLATES OF PLATECONE RETICULATED SHELL WANG Xing, WANG Fan, CA Sai-Yuan Fiber Reinforced Plastics/Composites    2009, 209 (4): 6-10.   Abstract （3502）      PDF （665KB）（1355）       Knowledge map    Save Platecone reticulated shell is a new type of space structure with good mechanical behavior and technical economy. In this paper,with theory of composite mechanics and theory of composite plate,shell through composite structure finite element method,local buckling and influence factors of laminated composite plates for platecone reticulated shell were analyzed,the mechanical characteristics of composite platecone reticulated shell  were studied, some important conclusions were obtained, which could provide theoretical foundation for practical design of composite platecone reticulated shell and laminated composite plates. Reference | Related Articles | Metrics

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THE ROLE OF TEMPERATURE ON IMPACT PROPERTIES OF  KEVLAR/FIBERGLASS COMPOSITE LAMINATES Liu, H. Y., Liu, D. Q. Fiber Reinforced Plastics/Composites    2009, 205 (6): 25-27.   Abstract （3468）      PDF （619KB）（2033）       Knowledge map    Save This paper demonstrated results of an experimental study on Kevlar/fiberglass composite laminate subjected to impact loading at variable temperaturesThe effect of temperature on maximum energy， elastic energy， maximum deflection after impact was studied at several low velocity impact energy levels(8J， 15J and 25J) The  temperatures considered were in the range of -50℃ to 120℃ Results indicated that impact performance of these composites was affected over the range of temperature considered. Reference | Related Articles | Metrics

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POLYURETHANE/CARBON NANOTUBE COMPOSITES PREPARED BY SOLUTION  MIXING AND THEIR PROPERTIES Wang, J. R., Xie, H. Q. Fiber Reinforced Plastics/Composites    2009, 205 (6): 35-38.   Abstract （3452）      PDF （1076KB）（1973）       Knowledge map    Save Carbon nanotubes were treated with acid， and their structures and dispersion stability were further investigated. Polyurethane/carbon nanotube composites were prepared by solution mixing and their structures were characterized by FTIR. The mechanical properties， elastic recovery behavior and thermal stabilization of the composites were analyzed. It indicated that the carboxylic acid groups were added onto the carbon nanotubes and the dispersion stability of CNTs in DMAc was improved. The CNTs were hydrogen bonded onto the polyurethane matrix. Consequently， the mechanical and thermal properties of the composites were both enhanced， while the elastic recovery behavior was little affected. Reference | Related Articles | Metrics

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STUDY OF THE CFRP CYLINDER UNDER EXTERNAL HYDROSTATIC PRESSURE XIAO Wen-Gang, WANG Rong, QIAO Ren-Hai Fiber Reinforced Plastics/Composites    2009, 209 (4): 11-13.   Abstract （3423）      PDF （317KB）（2132）       Knowledge map    Save A general design methodology was presented for CFRP cylinder for deep ocean applications under external hydrostatic pressure.  The formula method and FEA  were comparable with the experimental results. Reference | Related Articles | Metrics

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INVESTIGATION ON THE DARKING PROBLEM OF GALVANIZED METAL INSERT IN COMPOSITE MOLDING PROCESS CHEN Yang, XIAO Yong-Dong, FU Chao-Jun, QUAN Wen-Hua Fiber Reinforced Plastics/Composites    2009, 209 (4): 59-62.   Abstract （3420）      PDF （484KB）（1463）       Knowledge map    Save As a main form of connectivity,the metal insert is widely used in various composite molding processes. This paper clarifies the main reason that may affect the galvanized metal insert darkening in the molding process, resolves the darkening problem by effective means. Reference | Related Articles | Metrics

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RESEARCH PROGRESSES OF WOODY FILLING/THERMOPLASTIC COMPOSITES LI Yue-Wen Fiber Reinforced Plastics/Composites    2009, 209 (4): 93-99.   Abstract （3395）      PDF （1054KB）（1472）       Knowledge map    Save The effect of species，dosage，dimension of woody filling and species of plastic on properties of woody filling/thermoplastic composites(WPC) was introduced，the research progresses about interface modification，toughening modification，processing modification and molding technology of WPC were summarized. Reference | Related Articles | Metrics

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PERMEABILITY OF THICK LAYUP OF GLASSFIBER FABRIC IN VARTM PROCESS  AND PROCESS OPTIMIZATION Gao.Y.T Li.W Luo.Y.K Fiber Reinforced Plastics/Composites    2009, 205 (6): 54-5.   Abstract （3274）      PDF （899KB）（2105）       Knowledge map    Save The permeability of different thick layup of glassfiber fabrics was investigated in VARTM with radial flow method. Flow characteristics in top and bottom layer and in 3D was also analyzed.The process optimization programmes were referred， and the feasibility were testified， which can provide solution for making thick layup components. Reference | Related Articles | Metrics

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TENSION STRENGTH AND SHEAR STRESS DISTRIBUTION OF GFRP STRENGTHENING CONCRETE BEAM Ge, X. X., Zhang, D. H., Wang, L. M. Fiber Reinforced Plastics/Composites    2009, 205 (6): 5-11.   Abstract （3252）      PDF （1817KB）（1910）       Knowledge map    Save To investigate the tension strength of glass fiber， axial tension experiments were carried out for five specimens with or without impregnating compounds. The experiments indicated that the epoxy resin could not only stick and protect glass fiber plates， but also increase its tensile strength. To deeply understand mechanical behavior of GFRP strengthening concrete structure ， nine specimens were tested by beams′ fourpoint bending experiments. One of the specimens was stick with strain gauges for tracking the failure process. Then， the damage process curves of the experiments and strain values were obtained. Comparison with two kinds of experiments， axial tension strength of glass fiber plates was greater than the strength of fourpoint bending test. Through the test data of concrete beam with GFRP and mechanics model analysis， the axis force and shear stress distribution of GFRP were analyzed respectively. Reference | Related Articles | Metrics

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ZHANG Na, TAO Shu-Yan, MA Ju, ZHANG Heng Fiber Reinforced Plastics/Composites    2009, 209 (4): 24-26.   Abstract （3199）      PDF （418KB）（1971）       Knowledge map    Save Related Articles | Metrics

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STUDY AND MODIFY ON RHEOLOGICAL PROPERTY OF A BISPHENOL A CYANATE RESIN LU Bo, ZHANG Zuo-Guang, GU Yi-Zhuo Fiber Reinforced Plastics/Composites    2009, 209 (4): 63-66.   Abstract （3172）      PDF （506KB）（1323）       Knowledge map    Save The rheological property of a bisphenol A cyanate resin was investigated by means of parallel plate method, it was modified by isothermal precure process. The effects of precure process on the chemical structure of resin were studied by IR, DSC and GPC methods. In addition, the influence of the  pressure applying moment and precure conditions on the quality of S2 glass fiber/cyanate resin composite laminates was analyzed for hot press process. It is shown that the cyanate resin has low cure reactivity and high flowability, so the resin flow can not be controlled easily. The precure process makes the resin cure to a certain extent, decreases resin flowability, improves resin processability significantly, and enhances the composite laminates quality. Reference | Related Articles | Metrics

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STUDIES ON CORROSION RESISTANCE OF UNSATURATED POLYESTER RESIN POLYMER BANG Ying, LIU Jian-Hua, LIU Min, LEI Yu-Long Fiber Reinforced Plastics/Composites    2009, 209 (4): 39-42.   Abstract （3163）      PDF （397KB）（1387）       Knowledge map    Save Unsaturated polyester resin artificial marble with the fillers of Ca(OH)2 and Al(OH)3 were soaked by 10% NaOH, 20% H2SO4 and toluene by 15, 30, 60 days.The flexural strength was mensurated and the mechanical properties was analyzed. The results showed that flexural strength was reduced rapidly with prolonging of the soaking time in corrosion solutions. The artificial marble soaked into corrosion solutions was observed by microscope. The observations showed that corrosion was dead against the polymer of unsaturated polyester resin,and the cohesive force between the polymer and fillers was reduced. The results of corrosive tests showed that toluene as organic solvent had a corrosion strong effect on polymer of unsaturated polyester resin，sodium hydroxide was relative strong, and sulfuric acid was relative weak. Reference | Related Articles | Metrics

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STUDY ON THE PREPARATION AND PROPERTIES OF HEMP/POLYETHYLENE COMPOSITES Zhuang.X.M Zhang.H.P Yan.X Fiber Reinforced Plastics/Composites    2009, 205 (6): 43-44.   Abstract （3143）      PDF （949KB）（1836）       Knowledge map    Save Hemp fabric reinforced polyethylene composites were prepared in this paper. The effects of processing parameters on the tensile and impact properties were investigated. The influence of hemp fibre content on the properties of the composites was discussed. The fracture surface morphology was investigated by using scanning election microscopy. The results showed that optimum processing conditions of the composites were obtained. Reference | Related Articles | Metrics

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APPLICATION OF RESIN BASED ABSORBING COMPOSITES IN AERONAUTICS  AND ASTRONAUTICS Zhai, Q. X., Huang, Y., Miao, L., Chen, Y. Fiber Reinforced Plastics/Composites    2009, 205 (6): 72-76.   Abstract （3133）      PDF （1150KB）（2934）       Knowledge map    Save The types of resin based absorbing composites were presented， such as carbon/thermoplastic resin based composite， fiber reinforced resin composites， resin based nanocomposite.With the research of material， characterization methods of the absorption properties were presented.Finally the application in aircraft， tactical missiles were discussed. Reference | Related Articles | Metrics

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RESEARCH ON RESIDUAL STRESS OF SEAL EDGE IN VACUUM PLATE GLAZING Wang, M. Y., Zhang, R. H., Zhang, J. F., Miao, H. Fiber Reinforced Plastics/Composites    2009, 205 (6): 58-61.   Abstract （3131）      PDF （892KB）（1982）       Knowledge map    Save Based on vacuum flat glass by a laboratory sample preparation， the residual stress field of seal edge of vacuum flat glass was researched by the electric measuring， it successfully tested the distribution of residual stress field of seal edge. Residual stress field of seal edge of vacuum flat glass was analyzed by numerical analysis method. By this method， the law of the stress distribution was obtained. The theoretical calculation results were basically consistent with the experimental results. It was explored that the linear expansion coefficient of seal edge having an influence on the residual stress of vacuum glass， and analyzed the stress coupling of seal edge having an influence on the residual stress of vacuum glass too. Using the residual stress as the basic parameters of assessing the failure of vacuum glass， to reveal the relationship between the residual stress intensity and elasticity modulus， and create the new failure calculation method based on the residual stress of vacuum flat glass. The contents of above mentioned study provided a theoretical basis for the allowable analysis of the seal edge residual stress of vacuum glass. Reference | Related Articles | Metrics

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STUDIES ON THE LONGTERM MECHANICAL PROPERTIES OF FRP TENDONS Zhan, J. D., Du, X. L., Wang, Z. H. Fiber Reinforced Plastics/Composites    2009, 205 (6): 77-80.   Abstract （3128）      PDF （612KB）（1877）       Knowledge map    Save Because of excellent corrosive resistance， FRP has been taken as an attractive alternative reinforcing material for steel to the corrosion problem. At the same time， FRP provides a high strength， good fatigue properties， low relaxation and creep rates， etc. Based on extensive reading of references at home and abroad， this paper describes the newest research work on the long term mechanical properties of FRP tendons. Reference | Related Articles | Metrics

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EXPERIMENTAL STUDY ON FLEXURAL BEHAVIORS OF PBO FIBER PLATE REINFORCED CONCRETE LIANG Xi-Feng, Zhang-Chun-Hua, Qu-Mu-Chao, WANG Shu-Xian Fiber Reinforced Plastics/Composites    2009, 209 (4): 77-79.   Abstract （3101）      PDF （429KB）（1212）       Knowledge map    Save The unidirectional PBO fiber sheets are layered on the concrete to strengthen the flexural properties. The bending performance of the reinforced concrete with different fiber volume content using threepoint bending experiment has been studied. And a digital scanning technology has been used for investigation destruction feature of the concrete. The results show that the flexural strength of the concrete has been significantly improved by PBO fiber sheets, and flexural strength of the concrete becomes higher and higher as raising the fiber volume fraction. When the fiber volume content is 1.35%, the bending strength of the concrete is about 3.6 times compared with the plain one. The destruction of the concrete changes from the brittle fracture of plain concrete to the toughness fracture. Reference | Related Articles | Metrics

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AGGREGATE GRADING STUDY ON PARTICULATEREINFORCED COMPOSITE XIE Jian-Xiong, LEI Zhe-An, LI Zhuo-Qiu Fiber Reinforced Plastics/Composites    2009, 209 (4): 42-44.   Abstract （3067）      PDF （379KB）（1449）       Knowledge map    Save The aggregate grading study on particulatereinforced composite (resin and quartz plate composite ) were studied with test.The results show that the prior way of aggregate gradation  can be obtained with right ratio of large particle quartz sand and small particle quartz plate，which can lower the quantity of resin from 20~25% to 12~14%，reduce the cost，improve the economy profits，and ensue not to lower bend strength of winding layer. Reference | Related Articles | Metrics

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THE USING OF MALEK AND FLYNNWALLOZAWA EQUATION IN CURING REACTION OF TDE85/MENA EPOXY RESIN SYSTEM Guo, J. J., Sun, J. L., Ren, M. S., Bai, R. C. Fiber Reinforced Plastics/Composites    2009, 205 (6): 12-15.   Abstract （3057）      PDF （767KB）（1880）       Knowledge map    Save The kinetics of the cure reaction for a system of TDE85/MeNA epoxy resin was monitored by the differential scanning calorimetry(DSC) and investigated by the constant heating methods. According to the DSC graphs， the Tβ graph extrapolation was used to get the characteristic curing process temperatures， and to confirm the technical parameters of the molding process of the resin system. The kinetic parameters of the curing reaction of TDE85/MeNA epoxy resin such as the overall activation energy Ea， the frequency factor A and the reaction equation were obtained， the results were that : E=67.05kJ/mol， A=5.05×109s1.The curing reaction was calculated accurately by using the correct kinetic model，and was set up by using Malek and FlynnWallOzawa equation. The result of comparing the heating flow graph from the kinetic model and the examination was in harmony ， it illuminated that the kinetic model could be used to depict the curing reaction of the TDE 85/MeNA epoxy system. Reference | Related Articles | Metrics

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STUDY AND APPLICATION OF LARGESCALE CONCRETE BEAMS STRENGTHENED WITH CFRP LAMINATE WANG Xin-Guo, ZHANG Chun-Sheng, WANG Wen-Hua, ZHOU Chao-Yang Fiber Reinforced Plastics/Composites    2009, 209 (4): 83-85.   Abstract （3055）      PDF （426KB）（1249）       Knowledge map    Save Large scale concrete beams were strengthened by prestressing CFRP laminate with the special mechanical stressing and anchoring tools, then the strengthened beams were carried out to failure under the monotone load. On the basis of experimental results, the prestressing technique is used to rehabilite a railway simplysupported concrete bridge. The strengthened effect is good through testing the change of crack width and the midspan deflection. Reference | Related Articles | Metrics

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MECHANICAL PROPERTIES AND MANUFACTURING PROCESS OF LATTICE REINFORCED SANDWICH COMPOSITES FANG Hai, LIU Wei-Qiang, WAN Li Fiber Reinforced Plastics/Composites    2009, 209 (4): 67-69.   Abstract （3044）      PDF （441KB）（1947）       Knowledge map    Save The vacuum infusion molding process (VIMP) is becoming popular as a new type for largescale/unusual composites. Selecting H60 PVC foam, fouraxis Eglass nonwoven fabric and vinyl resin, a type of innovative reinforced sandwich composite as lattice reinforced sandwich (LRS) are fabricated by VIMP. The fabrication results show that VIMP is a highspeed and costeffective manufacturing method because of the resin flow channel provided by the acuminate grooves in both sides of foam core. The lattice in LRS along core’s height assure an even flow on both sides of core that can complete the filling process in a short time. The shear, flatwise compression and flexural behavier of LRS are enhanced compared with the traditional sandwich. The flexural ultimate bearing capacity of LRS are studied which can be used as reference to engineering practice. Reference | Related Articles | Metrics

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OPTIMAL DESIGN OF COMPOSITE STIFFENED PLATES MU Peng-Gang, WAN Xiao-Peng, ZHAO Mei-Yang Fiber Reinforced Plastics/Composites    2009, 209 (5): 57-60.   Abstract （3039）      PDF （1089KB）（1346）       Knowledge map    Save The optimization techniques of composite blade stiffened plates have been established with the genetic algorithm in this paper. The genetic algorithm using the multiparameter concatenated coding is applied to the layout optimization of the number and height of stiffeners, thickness of stiffeners and panel of composite stiffened plates. The results of the examples indicate that the methods proposed are available, and show us a new way to structural optimization problem. Reference | Related Articles | Metrics

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FINITE  ELEMENT ANALYSIS  ON  GFRP  TRAFFIC  LIGHT  FRAME YIN Bo Fiber Reinforced Plastics/Composites    2009, 209 (4): 74-76.   Abstract （3035）      PDF （336KB）（1305）       Knowledge map    Save A great number of signal light frames are used in traffic engineering,the important guideline of engineering construction is quality ,durability and cost . Compared with steel, the property of glass fiber composite material is discussed, and a traffic light frame is investigated with the finite element soft ware ANSYS. Reference | Related Articles | Metrics

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DESIGN AND STUDY OF ULTRASONIC TEST SYSTEM FOR VOID CONTENT IN COMPOSITE MATERIALS JIANG Zhi-Feng, TUN Rui-Meng, TUN Zuo-Lun, SONG Li-Jun Fiber Reinforced Plastics/Composites    2009, 209 (4): 27-31.   Abstract （2974）      PDF （666KB）（1279）       Knowledge map    Save On the basis of ultrasonic test theory model, the ultrasonic testing data acquisition and data processing methods were described. Computer control system for ultrasonic testing technology researched timedomain waveform signal processing based on ultrasonic board. The Cscan image and column chart of CFRP surface were obtained. The result showed that the test system based on automation can accurately test the void content of carbon fiber reinforced plastics on the spot. Reference | Related Articles | Metrics

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RECYCLING TECHNOLOGY OF COMPOSITE MATERIAL XU Jia, SUN Chao-Meng Fiber Reinforced Plastics/Composites    2009, 209 (4): 100-103.   Abstract （2950）      PDF （538KB）（1528）       Knowledge map    Save This paper presents some methods of composite wastes recycling technology, compares the properties of several main methods which called chemical recycling, energy recycling, physical recycling and integrated approach. Points out that according to the countrys current macroeconomic policy, integrated approach such as cement kiln recycling should be greatly developed. Reference | Related Articles | Metrics

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OVERVIEW OF THE DEVELOPMENT FOR FIBER REINFORCE COMPOSITE  WIND TURBINE BLADE GAO Hui-Huan Fiber Reinforced Plastics/Composites    2009, 209 (4): 104-108.   Abstract （2941）      PDF （813KB）（1754）       Knowledge map    Save The current development of the wind powergeneration and the fiber reinforce composite wind turbine blade at home and aboard is briefly introduced, then the blade material, structural and aerodynamics design, and molding of the technology are also elaborated. Finally  the development of turbine blade is described. Reference | Related Articles | Metrics

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GU Gong-Yu, LI Cheng, YANG Ji, SU Yu-Zhen Fiber Reinforced Plastics/Composites    2009, 209 (4): 35-38.   Abstract （2937）      PDF （487KB）（1296）       Knowledge map    Save Reference | Related Articles | Metrics

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FORCED RESPONSE ANALYSIS OF COMPOSITE MATERIAL BARREL Xu, E. D., Q. L. F., C. L. M. Fiber Reinforced Plastics/Composites    2009, 205 (6): 16-18.   Abstract （2882）      PDF （1079KB）（1866）       Knowledge map    Save In order to evaluate the dynamic property of composite material barrel， the forced response analysis is conducted by using mode superposition method on the basis of modal analysis and damping analysis. The muzzle vibration status of the composite material barrel is obtained and compared with which of the steel barrel. The results show that the response amplitude and frequency of composite material barrel is less than the response of steel barrel. The dynamic property of the composite material barrel is much more excellent. Reference | Related Articles | Metrics

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191# UNSATURATED POLYESTER/GFRP ARTIFICIAL ACCELERATED AGING RESEARCH WANG Yun-Yang, ZHAO Qing, MENG Jiang-Yan, ZHU Chun-Ya Fiber Reinforced Plastics/Composites    2009, 209 (5): 53-56.   Abstract （2872）      PDF （1145KB）（1920）       Knowledge map    Save The aging behavior of 191# unsaturated polyester resin and its GFRP have been studied by artificial thermooxidation aging and artificial xenon arc lamp aging. The morphology and glossiness of specimens were investigated by microscope and glossmeter respectively. The yellowness index (YI) was tested by differential colorimeter. The unsaturated polyester resin was analysed by FTIR and DMA. The tensile strength and bend strength of the specimens were measured. With aging evolving, the appearance of the specimens changed more and more yellow, its glossiness reduced, and appeared some crack on the sample’s surface. These changes were related to the aging mode. The DMA showed that after xenon arc lamp aged 90d, Tg of the resin was from 84℃ to 88℃, and to 83℃after aged 240d, and its storage energy decreased gradually. Mechanical strength of the specimens increased at first then decreased. The aging of the resin and its composites were more susceptible to xenon arc lamp than thermooxidation. Reference | Related Articles | Metrics

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STUDY ON THE IMPROVEMENT OF COATING ADHESION BY CPPGGMA WHEN PAINTING POLYPROPYLENE AND ITS COMPOSITE XIAO Kun-Li, ZHOU Xiao-Dong Fiber Reinforced Plastics/Composites    2009, 209 (4): 45-48.   Abstract （2827）      PDF （535KB）（1370）       Knowledge map    Save In this paper，polypropylene (PP) bonding with CPPgGMA (glycidyl methacrylate grafted chlorinated polypropylene) was studied as well as bicomponent acrylic coating painted on PP and its composite after using CPPgGMA as a primer.The results show that the adhesive strength of CPPgGMA to PP is better to some extent than that of CPP to PP，and the adhesion strength of coatingsubstrate can be improved effectively.As the grafting degree of glycidyl methacrylate onto chlorinated increasing，the adhesion strength of coatingsubstrate increased more and more significantly.When using CPPgGMA with grafting degree of 2.31% as primer the coating adhesion can even reach class zero which is the best class. Reference | Related Articles | Metrics

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SIMPLIFIED CALCULATING METHOD OF AFRP BONDING LENGTH FOR REINFORCED  CONCRETE BEAMS STRENGTHENED WITH EXTERNALLY BONDED AFRP TIAN Guo-Zhi, WANG Xu-Rong, WANG Wei-Zhi, ZHANG Shen-Wei Fiber Reinforced Plastics/Composites    2009, 209 (4): 14-16.   Abstract （2821）      PDF （405KB）（1339）       Knowledge map    Save Based on the test results of RC beam strengthened with externally bonded AFRP, this paper analyzes the premature failure process of reinforced concrete members strengthened with externally bonded AFRP, the interfacial shear stress is maximum at the AFRP cutoff point and starts to decay as the distance from the cutoff point  is Reference | Related Articles | Metrics

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EXPERIMENTAL STUDY ON ULTRASONIC EVALUATION OF CARBON/EPOXY 3D BRAIDED COMPOSITES Wang, G. J., Sun.Y, Li, J. L. Fiber Reinforced Plastics/Composites    2009, 205 (6): 39-42.   Abstract （2818）      PDF （929KB）（2483）       Knowledge map    Save Ultrasonic echo Ascan method was used to scan carbon/epoxy 3D braided composites. Defects areas located by using ultrasonic scanning were anatomized microscopically to investigate the relationships between the ultrasonic pulse wave characteristics and micromorphology of defects. Based on the experimental identification method depended on wave analysis method,the ultrasonic attenuation of 3D braided composites was discussed from the point of the distribution of carbon filaments and the interfaces between carbon fiber bundles and resin. The experimental results show that the characteristics of ultrasonic propagation and attenuation in the composites are related to the microstructure and some defects within the 3D braided composites. The characterization of ultrasonic Ascan signal can be used to nondestructive inspection and defects assessment. Reference | Related Articles | Metrics