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

Abstract

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

CLC Number:

TB332

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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