EFFECT OF WASHER SIZE ON BEARING STRENGTH OF SINGLE-LAPBOLT JOINT IN CARBON FIBER REINFORCED COMPOSITES

Abstract

Abstract: An experimental study of the diameter size of washer on the bearing strength and failure of carbon fiber reinforced composites single-lap bolt joints were investigated. It was found that the bearing strength of single lap bolt joint was improved by the increasing of diameter of the washer. When the diameter of the washer is gradually increased from 11.8 mm to 13.8 mm, 15.8 mm, 17.8 mm, the bearing strength is gradually increased by 5.76%, 5.87%, 2.4% accordingly. However, the experimental results show that when the diameter of the washer increases to a certain extent, the effect of strengthening the bearing strength is weakened. But there was no effect on the failure mode, and the failure mode is still the extrusion failure mode. A 3D model of carbon fiber reinforced composite laminates with bolt joint is created by using the software Abaqus. The 3D Hashin failure criteria with tensile delamination damage and compression delamination damage and the improved material stiffness degradation model of Tan and Tserpes were introduced. The simulated model captures the experimentally obtained results with error less than 10%, and predicts the failure modes successfully.

Key words: carbon fiber reinforced composites, washer, finite element, bearing strength

CLC Number:

TB332

ZHANG Xin-yi, KONG Hai-juan, HU Zhi-feng, SUN Ze-yu. EFFECT OF WASHER SIZE ON BEARING STRENGTH OF SINGLE-LAPBOLT JOINT IN CARBON FIBER REINFORCED COMPOSITES[J]. Composites Science and Engineering, 2020, 0(5): 53-62.

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