基于玻纤映射的螺栓连接强度及损伤分析

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (8): 12-18.

基于玻纤映射的螺栓连接强度及损伤分析

聂昕, 磨承杰^*, 姚威, 熊东箭

湖南大学汽车车身先进设计制造国家重点实验室,长沙410082

收稿日期:2018-01-18 出版日期:2018-08-28 发布日期:2018-08-28
通讯作者: 磨承杰(1991-),男,硕士研究生,主要从事复合材料新结构、新材料、新工艺方面的研究,mochengjie@163.com。
作者简介:聂昕(1982-),男,博士,讲师,主要从事汽车车身新结构、新材料、新工艺方面的研究。
基金资助:
国家自然基金重点项目(61232014);广西区科技计划资助项目(桂科攻1348005-1,桂科攻14122005-7)

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

NIE Xin, MO Cheng-jie^*, YAO Wei, XIONG Dong-jian

State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University,Changsha 410082, China

Received:2018-01-18 Online:2018-08-28 Published:2018-08-28

摘要/Abstract

摘要： 探讨了车身结构中注塑成型玻纤增强复合材料(GFRP)螺栓连接强度及其损伤失效的主要类型。开展了PA6 GF30材料的相关力学性能测试,基于Multicontinuum(MTC)理论进行材料分解与材料参数拟合,获得了有限元仿真分析的相关材料参数。拉伸样条的仿真与实验结果表明:基于材料分解、玻纤映射、材料参数拟合的仿真分析方法能有效解决注塑件模流分析与结构分析的延续性与准确性问题,同时提高了仿真分析的效率。基于玻纤材料的准确映射信息,着重研究了玻纤增强复合材料间螺栓的连接强度与损伤失效模式,并综合分析了端径比、宽径比及厚径比对螺栓连接强度及材料损伤失效的影响。结果表明:连接失效的主要模式为拉伸失效与挤压失效,且对连接性能影响较大的因素依次为宽径比、厚径比、端径比;随着宽径比、端径比的增大,螺栓的连接强度均有所增强,但当比值分别大于4和2.5后连接强度不再增加,主要表现为挤压失效;增大厚径比能显著提高螺栓的连接强度。

关键词: GFRP, 损伤分析, 材料分解, 玻纤映射

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

中图分类号:

TB332

聂昕, 磨承杰, 姚威, 熊东箭. 基于玻纤映射的螺栓连接强度及损伤分析[J]. 玻璃钢/复合材料, 2018, 0(8): 12-18.

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.

参考文献

[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.