BOLTED JOINTS CONNECTION STRENGTH & DAMAGE EVOLUTION ANALYSIS BASED ON FIBER MAPPING

Abstract

Abstract: The main types of the bolt connection strength and the damage failure of the injection molding glass fiber reinforced composites (GFRP) in the body structure have been studied. Mechanical properties tests of the PA6 GF30 materials have been carried out, based on Multicontinuum materials decomposition theory, fiber mapping and fitting materials curve to obtain their simulation parameters. Compared with the results of simulation and experiment, it showed that based on material decomposition, fiber mapping, curve fitting of the simulation analysis method, we can effectively solve the problems between moldflow analysis and structure analysis continuously and accurately. Based on the accurate mapping information of GFRP, the bolt connection strength and damage failure modes between GFRP were studied, and comprehensive studies of E/D, W/D and T/D on the strength of bolt connection were performed. The results show that the main forms of connection failure are tensile failure and extrusion failure, and the factors that affect the connection performance are W/D, T/D and E/D. With the increase of the E/D and the W/D, the bolt connection strength increases, but the ratio no longer increases after a certain number, which is mainly manifested as the extrusion failure. Increasing the T/D can significantly increase the bolt connection strength.

Key words: GFRP, damage analysis, materials decomposition, fiber mapping

CLC Number:

TB332

NIE Xin, MO Cheng-jie, YAO Wei, XIONG Dong-jian. BOLTED JOINTS CONNECTION STRENGTH & DAMAGE EVOLUTION ANALYSIS BASED ON FIBER MAPPING[J]. Fiber Reinforced Plastics/Composites, 2018, 0(8): 12-18.

References

[1] Laura Galuppi, Gianni Royer-Carfagni. Homogenized analysis la Hashin for cracked laminates under equi biaxial stress Applications to laminated glass[J]. Composites, 2017, 332-347.
[2] 朱智毅. 复合材料厚板单钉双剪挤压试验与数值模拟[J]. 江苏科技信息, 2016, 63-65.
[3] 杨强, 解维华, 孟松鹤, 等. 复合材料多尺度分析方法与典型元件拉伸损伤模拟[J]. 复合材料学报, 2015, 617-624.
[4] Mark Shvidler, Kenzi Karasaki. Multicontinuum description of flow in composite heterogeneous media[J]. Water Resources Research, 2000, 3615-3629.
[5] Jiamin Jiang, Rami M. Younis. Hybrid coupled discrete fracture ma-trix and multicontinuum models for unconventional reservoir simulation[J]. SPE Journal, 2015, 1-19.
[6] Behrad Koohbor, Suraj Ravindran, Addis Kidane. Experimental determination of representative volume element (RVE) size in woven composites[J]. Optics and Lasers in Engineering, 2017, 59-71.
[7] Emmett E. Nelson, Jason A. Gies. The virtues of multicontinuum mechanics for composites analysis[J]. Emmett Nelson, 2009, 1-13.
[8] Kazbek Z. Karayev, Pierre J. Minguet, et al. Residual strength evaluation of typical aircraft composite structures with a large notch[J]. Journal of Composite Materials, 2009, 459-466.
[9] Ramazan Karakuzu, et al. Failure behavior of laminated composite plates with two serial pin-loaded holes[J]. Composite Structures, 2008, 82: 225-234.
[10] R. B. Pipes, B. W. Cole. On the Off-Axis strength test for anisotropi materials[J]. Journal of Composite Materials, 1973, 7(2): 246-256.
[11] R. Narayanaswami, H. M. Adelman. Evaluation of the tensor polynomial and hoffman strength theories for composite materials[J]. Journal of Composite Materials, 1977, 11(4): 366-377.
[12] Kenik D. J.. Advanced techniques for constituent-based progressive failure analysis of composite structures, master of science thesis[J]. Journal of materials processing technology, 2009, 517-527.
[13] 吴扬. Helius在航空航天复合材料分析设计中的应用[J]. 中国制造业信息化, 2010, 38-40.
[14] International Organization for Standardization. Plastics-determination of tensile properties-Part2: test conditions for moulding and extrusion plastics: ISO 527-2∶s2012[S].
[15] 晋刚. 注射成型纤维增强试样的机械性能模拟[J]. 塑料, 2011, 40(1): 128-131.
[16] Panding Wang, Rujie He. A novel predictive model for mechanical behavior of single-lap GFRP composite bolted joint under static and dynamic loading[J]. Composites, 2015, 322-330.