COMPOSITES SCIENCE AND ENGINEERING

COMPOSITE PROCESSING DECISION RULES MINING METHOD BASED
ON KNOWLEDGE DEPENDENCE

WANG Gong-Dong, BANG Gao-Liang, CHEN Pan-Hai

2009, 209(3): 3-5.

Asbtract ( 1797 )

PDF (435KB) ( 1541 )

References | Related Articles | Metrics

In order to make composite process decision knowledge mine automatically，based on analyzing decision knowledge of the resin composite process，a composite process data mining model is established based on rough set.A composite decision mining method based on knowledge dependence is presented，which uses knowledge dependence algorithm to preprocess and reduce the process data，the process decision tree is established at the same time.The efficiency of decision tree generation can be improved by using the method.At last，an example is illustrated to verify the validity of the method，and the composite process decision rules may obtained automatically.

STUDY ON CALCULATION METHOD OF BEARING CAPACITY
OF THE RC BEAM REINFORCED WITH FRP

DENG Yu, ZHANG Feng, LI Bing

2009, 209(3): 6-7.

Asbtract ( 1740 )

PDF (230KB) ( 1179 )

Related Articles | Metrics

In this paper,three typical 2.5D woven fabrics were designed and experimental samples met the requirements were made.The main mechanical properties in warp and weft direction of the composites were obtained by tensile,compression,double lap shear,and then the relationship between structure and properties were analyzed.Some useful conclusions were got.The conclusion indicates that the properties of composites,including tensile,compressive and shear strength, which are mainly decided in yarn inclination angle and fiber volumetric content.The properties of composites with the same layers manifests that the deep crossing linking are bigger than the straight shallowcrossing linking,which are bigger than the curved ones.

ONEPARAMETER INVERSION ANALYSES OF FUNCTIONALLY GRADED MATERIALS

CHENG Hong-Mei, CAO Zhi-Yuan

2009, 209(3): 16-22.

Asbtract ( 1306 )

PDF (600KB) ( 1077 )

References | Related Articles | Metrics

The materials parameters of functionally graded materials are changed with spatial location. It is difficult to measure the parameters distribution of functionally graded materials point by point according to the experimental conditions. Therefore, the inversion of functionally graded materials and structures is researched by the microelement method in this paper. Namely, the internal parameter’s distributions of functionally graded materials are inversed by the known displacement or natural frequency. This method can greatly simplified the test works of the basic mechanical performance of functionally graded materials.

EXPERIMENTAL STUDY ON BONDSLIP BEHAVIOR BETWEEN BFRP AND WOOD

WANG Jian-Gen, YANG Yong-Xin, HU Ling, ZHUANG Rong-Zhong

2009, 209(3): 23-27.

Asbtract ( 1661 )

PDF (603KB) ( 1307 )

References | Related Articles | Metrics

The FRPtowood bondslip model is the fundamental relationship to analyze the behavior of the fiber reinforced polymerstrengthened wood structures Eighteen specimens through externally bonded BFRP plates were employed to study the bond behavior between BFRP and wood The influences of the bond length, and the number of layers was investigated Based on the experimental study on the bond behavior between BFRP and wood, the strain development and distribution in BFRP sheet were analyzed, and the direct shear bond stress distribution and local bond stress versus slippage relationship were obtained in this paper Based on the Popovics model, a local bond stressslip constitutive model of fir grain direction was proposed by the statistical regression analysis of the test results The model matches the experimental results well, and is available references for the practical applications and corresponding codes

EXPERIMENTAL RESEARCH ON BASIC MECHANICAL PROPERTIES OF GFRP BARS

GAO Dan-Ying, LI Shi-Hui, ZHU Hai-Tang, ZHAO Ke

2009, 209(3): 28-32.

Asbtract ( 1731 )

PDF (650KB) ( 1431 )

References | Related Articles | Metrics

Glass fiber reinforced polymer bars with different diameters，pitches and surface forms were prepared in this paper.Through the compressive test and shear test on GFRP bars，the failure mode and mechanism of GFRP bars were researched; the effect of diameter，pitch，surface form and slenderness ratio on compressive strength and shear strength was also analyzed.It is found that changes in diameter have a certain influence on compressive strength and shear strength of GFRP bars.Pitch and slenderness ratio have no distinct effect on mechanical properties of GFRP bars.

MODIFIED SMC/BMC UNSATURATED POLYESTER TO INCREASE
INFILTRATION OF GLASS FIBER

ZHU Chao, WANG Qi, ZHUANG Jia-Yong, JIN Xiao-Zhao

2009, 209(3): 33-35.

Asbtract ( 1527 )

PDF (387KB) ( 1320 )

References | Related Articles | Metrics

The micro structure and main properties of unsaturated polyester modified with OMMT/SiO2 were studied with XRD, FTIR, contact angle and mechanical properties. The study showed that with the addition of OMMT/SiO2, the contact angle of glass fiber and resin became smaller,the infiltration was increased. Physical tests showed that when OMMT/SiO2 content reached 4%, unsaturated polyester impact strength could be increased by 50%, flexural strength fell below 15%.

STRUCTURE AND PROPERTIES OF T300 AND DOMESTIC PANBASED CARBON FIBER

YANG Yu-Rong, YANG Yong-Sheng, HUA Zhong, LIU Xin

2009, 209(3): 36-40.

Asbtract ( 1476 )

PDF (541KB) ( 1300 )

References | Related Articles | Metrics

The microstructure， chemical composition of T300 and domestic PANbased carbon fiber（GCF） was studied by means of WARD，SAXS，RAMAN and XPS. Comparing GCF to T300，results show that the layer spacing d002 of GCF is lower than that of T300，both La and Lc of GCF are higher than that of T300.In addition,the size of the pores of GCF is bigger than that of T300，the bigger pore percentage of unit volume of GCF is higher than that of T300，and the micropore content of GCF is lower than that of T300.The content of surface oxygencontained functional groups of GCF is 31.35％,and the surface activity of GCF is lower than that of T300.

THE PROPERTIES OF ABLATION RESISTANT QUARTZ/BARIUMPHENOLIC
COMPOSITES FABRICATED BY RTM

LI Jian-Wei, YIN Chang-Beng, ZENG Jing-Cheng, DAI Xiao-Jing

2009, 209(3): 41-44.

Asbtract ( 1981 )

PDF (555KB) ( 1221 )

References | Related Articles | Metrics

The processing and curing reaction behavior of bariumphenolic resin for resin transfer molding(RTM) were studied.Based on the results,samples of quartz/bariumphenolic composites were made by RTM.Then mechanical and ablative properties of samples were tested and evaluated.Experimental results show that the quartz/bariumphenolic composites have good mechanical properties，a certain ablative performance with linear ablation rate of 0.092mm·s-1 and mass ablation rate of 0.0707g·s1 under oxyacetylene ablation test.

EXPERIMENT STUDY ON TENSILE FAILURE MECHANISMS OF BONDING
INTERFACE FOR GFRP/STEEL COMPOUND STRUCTURE

ZHANG Ying-Jun, MEI Zhi-Yuan, ZHU Xi

2009, 209(3): 45-48.

Asbtract ( 2027 )

PDF (489KB) ( 1561 )

References | Related Articles | Metrics

The strength of tensile failure mechanisms of interface for GFRP/steel compounded structures was studied. The adhesive and epoxy was modified by different additive, and the structure specimen were made by different technics. According to experimental results, the strength of structure’s tensile failure was found and three kinds of typical tensile failure modes were built up, then the failure mechanism was analyzed.

STUDY ON POLY(LACTIC ACID)/STARCH COMPOSITE FOAMS（Ⅱ）: INFLUENCE OF MODIFIED
STARCH ON COMPATIBILITY，RHEOLOGICAL PROPERTY AND FOAM PERFORMANCE

YUAN Hua, ZHAO Qiu-Feng, LIU Zhi-Yong, REN Jie

2009, 209(3): 49-52.

Asbtract ( 1344 )

PDF (580KB) ( 1167 )

References | Related Articles | Metrics

PLA/modified starch composites and foams were prepared by extrusion.The compatibility and rheological property of PLA/starch composites were researched.As shown，PLA/gelatinized starch had better compatibility and viscoelasticity.The results of foam performance showed that foam performance tended to be excellent after starch was gelatinized，and water absorption could be decreased remarkably.

STUDY ON COMPRESS MECHANICAL PROPERTIES OF
REINFORCED POLYURETHANE RIGID FOAM

XIA Fan, WU Xiao-Qing

2009, 209(3): 53-55.

Asbtract ( 1815 )

PDF (440KB) ( 1349 )

References | Related Articles | Metrics

The polyurethane rigid foam (PURF) reinforced by nanometer silicon dioxide and hollow glass beads are prepared by highspeed mechanical agitation method,the compress mechanical properties of filledtype PURF are studied.Meanwhile,The distributed pattern of PURF particles is observed by microscope．The results show that the bearing capacity of cellular columniation is evidently improved by the infilling of additive.With the increasing content of additive,the compress strength of PURF was effectively enhanced first and decreased later,namely,the compress mechanic properties of the composites are the highest when the amount of additive is the best dosage；and with the improving density of PURF,the compress properties of the composites are evidently enhanced.

THE MODIFIED STUDY OF DIALLYL COMPOUNDS ON BISMALEIMIDES

ZHANG Yang-Jiang, XU Yao-Min, ZHENG Kang-Sheng

2009, 209(3): 56-58.

Asbtract ( 1362 )

PDF (377KB) ( 1229 )

References | Related Articles | Metrics

In order to obtain bismaleimide resin with better property，O，O’diallybisphenol A(BA) and O，O’diallybisphenol S(BS) were used together as modified agent of bismaleimide resin，the influence of the ratio of BA/BS and cure posttreatment time on modified BMI was investigated in this paper.The thermal properties of modified bismaleimide resin were investigated primarily by Dynamic Mechanical Analysis (DMA).The results show that the glass transition temperature (Tg) of the cast prepared with BA/BS=7/3(molar ratio) can reach 349.5℃，and the higher Tg of cast can be achieved by prolonging cure posttreatment time.

STUDY OF LARGESCALE WIND TURBINE NACELLE

LI Yi-Quan, LI Xiu-Fen, HU Xiu-Dong

2009, 209(3): 59-60.

Asbtract ( 1646 )

PDF (282KB) ( 1231 )

References | Related Articles | Metrics

This paper presents the finite element analysis of 1.5MW wind turbine nacelle,explains its design,production and test.The result has great guiding signifincance in realizing largescale production and serial production of nacelle.

NUMERICAL SIMULATION OF CONSIDATION FOR AUTOCLAVE PROCESS

LIU Yong, WU Song-Ping

2009, 209(3): 61-64.

Asbtract ( 1525 )

PDF (480KB) ( 1239 )

References | Related Articles | Metrics

Based on porous media theory, a three dimensional flowthermal field numerical model was developed by the volume averaging method and effective stress theory, for considation of autoclave process, assuming that the prepregs were deformable porous medium. The fiber deformation, change of the volume fraction and permeability varied with the volume fraction of fiber was considered. ALE moving mesh method and FEM were used. The result shows that, the model proposed here has better agreement with experimental data than the classical models.

STUDY ON BONDING PROCESS OF TYPICAL HONEYCOMB
SANDWICH COMPOSITE STRUCTURE

WANG Liang, SUN Ling

2009, 209(3): 65-67.

Asbtract ( 1297 )

PDF (405KB) ( 1194 )

References | Related Articles | Metrics

This paper makes study on the defect of the typical honeycomb sandwich composite structure after the process of bonding It also finds the root causes based on the analysis of the material characteristic and stress shape Through the improvement of processes such as substep curing，aftertreatment of honeycomb and foam glue procure, the problem of surface deformation of the honeycomb sandwich composite structure after bonding have been solved.

STUDY ON PROPERTIES OF BORON PHENOLIC FOR HIGH TEMPERATURE STRUCTURE

CUI Yi, LIU Jing-Lin, YANG Ming

2009, 209(3): 68-70.

Asbtract ( 1386 )

PDF (360KB) ( 1151 )

References | Related Articles | Metrics

Through infrared analysis，it can be found that the boron exists in the molecular chain as chemical bonds in the boron phenolic resin.Thermal gravimetric analysis result shows the initial decomposition temperature of this boron phenolic resin is 220℃，the residual carbon rate at 800℃ is about 65 percent.The maintain rate of boron phenolic resin composite material on its mechanical properties at 250℃ is about 70 percent，so it can be used as a high temperature structural material.

APPLICATION AND PREPARATION OF CONTINUUM MULLITE FIBRES

TAN Hong-Bin

2009, 209(3): 71-75.

Asbtract ( 1656 )

PDF (644KB) ( 1424 )

References | Related Articles | Metrics

The properties，application，preparation method and research status of mullite fibres are reviewed.It will become a trend to prepare mullite fibres by solgel method.The development direction of the method has also been forecasted.

HYDROTHERMAL PROPERTIES OF CARBON FIBER REINFORCED PLASTICS

LV Xin-Ying, JIANG Long, YAN Liang

2009, 209(3): 76-80.

Asbtract ( 2652 )

PDF (710KB) ( 1391 )

References | Related Articles | Metrics

The effect of hydrothermal environment on the carbon reinforced resin composite materials is remarkable,which can reduce the strength and toughness.This paper presents the studies of the hydrothermal properties of carbon fiber reinforced plastics (CFRP) , analyzes the moisure model and diffusion mechanism through theory and experimental.Meanwhile,the paper summarizes the experimental methods and testing means of CFRP’s hydrothermal properties at home and abroad.The status of accelerated aging environment of CFRP is pointed out,some recommendations for future work are proposed.

REVIEW OF THE TEMPERATURE FIELD RESEARCH OF AUTOCLAVE MOULDING
FOR ADVANCED COMPOSITE COMPONENTS

WANG Yong-Gui, LIANG Xian-Zhu, CAO Zheng-Hua

2009, 209(3): 81-85.

Asbtract ( 1570 )

PDF (701KB) ( 1425 )

References | Related Articles | Metrics

Based on analyzing the heat transfer route and mode，the temperature field research of autoclave moulding is reviewed from autoclave temperature field， eggcrate tooling temperature field and component temperature field.The future research emphasis has also been pointed out.

PROGRESS IN FIBER ORIENTATION SIMULATION OF SHORT FIBER COMPOSITES
INJECTION MOLDING

SHANG Guan-Lin-Jian, SHEN Chang-Yu, LIU Bao-Chen, ZHANG Shi-Xun

2009, 209(3): 86-88.

Asbtract ( 1646 )

PDF (466KB) ( 1253 )

References | Related Articles | Metrics

During an injection molding process of composites, fiber orientation is produced by the flow state. In this paper, the developments and achievements in research of fiber orientation are reviewed, including fiber force analysis, fiber motion, fiber orientation, influence of processing parameters on glass fiber orientation, simulation and prediction of fiber orientation, etc. Finally, brief visions were also presented．

Table of Content