多因素协同对GF/VE复合材料螺栓连接强度的影响研究

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (12): 54-58.

多因素协同对GF/VE复合材料螺栓连接强度的影响研究

蔡正林, 马鹏, 李进^*, 康少付, 张佃平

宁夏大学宁夏光伏材料重点实验室,银川750021

收稿日期:2020-07-24 发布日期:2020-12-30
通讯作者: 李进(1964- ),女,教授,博士,主要从事先进复合材料及复合材料力学方面的研究,li-jin@163.com。
作者简介:蔡正林(1997- ),男,硕士,主要从事复合材料力学方面的研究。
基金资助:
宁夏自治区重点研发项目(2018BDE02048)

STUDY ON THE EFFECT OF MULTI-FACTOR COOPERATION ON THE BOLTED CONNECTION STRENGTH OF GF/VE COMPOSITE MATERIALS

CAI Zheng-lin, MA Peng, LI Jin^*, KANG Shao-fu

Key Laboratory of Ningxia for Photovoltaic Materials, Ningxia University, Yinchuan 750021, China

Received:2020-07-24 Published:2020-12-30

摘要/Abstract

摘要： 采用真空辅助RTM工艺制备玻纤/乙烯基酯(GF/VE)复合材料,基于L9(3⁴)正交表选取宽径比、端径比、夹紧扭矩和改性无纺布材料四个因素并分别选取三个水平,研究了多因素协同对GF/VE复合材料单钉双搭接螺栓连接性能的影响。结果表明,宽径比为2,端径比为6,夹紧扭矩为9 N·m,层间加入TPU无纺布改性的GF/VE复合材料的螺栓连接强度最大。宽径比对复合材料连接强度的影响大于端径比,宽径比与端径比大于3时,复合材料在达到最大载荷后不会立即失效,而宽径比和端径比小于3时复合材料达到最大载荷后会立即失效。通过SEM对断口形貌进行分析,发现试样层间断裂面凸凹不平,热塑性薄膜加热熔化后与乙烯基酯树脂发生共混形成颗粒状弥散相,这种现象有利于增强纤维与树脂之间的粘结强度。

关键词: GF/VE复合材料, 螺栓连接, 强度, 正交实验

Abstract: In this paper, glass fiber/vinyl ester (GF/VE) composite was prepared by vacuum assisted RTM process. Based on L9(3⁴) orthogonal table, joint dimension (w/d: sample width/hole diameter, e/d: edge distance/hole diameter);clamping torque and modified non-woven material and three levels were selected respectively to study the effect of multi-factor collaboration on the joint performance of single screw double lap bolts of GF/VE composite materials. The results show that when w/d is 2, e/d is 6, the clamping torque is 9, the bolt connection strength of the modified GF/VE composite material with TPU non-woven fabric between layers is the largest. The influence of w/d on the joint strength of composite material is greater than that of e/d. When w/d and e/d is greater than 3, the composite material will not fail immediately after reaching the maximum load, while when w/d and e/d is less than 3, the composite material will fail immediately after reaching the maximum load. The morphology of the fracture was analyzed by SEM, and it was found that the fracture surface between the layers of the sample was uneven, and there were granular dispersed phases on the matrix resin between the layers. This was caused by the blending of the thermoplastic film with the vinyl ester resin after heating and melting. This phenomenon helps to enhance the bond strength between the fiber and the resin.

Key words: GF/VE composites, bolted connections, strength, orthogonal test

中图分类号:

TB332

蔡正林, 马鹏, 李进, 康少付, 张佃平. 多因素协同对GF/VE复合材料螺栓连接强度的影响研究[J]. 复合材料科学与工程, 2020, 0(12): 54-58.

CAI Zheng-lin, MA Peng, LI Jin, KANG Shao-fu. STUDY ON THE EFFECT OF MULTI-FACTOR COOPERATION ON THE BOLTED CONNECTION STRENGTH OF GF/VE COMPOSITE MATERIALS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2020, 0(12): 54-58.

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