ANALYSIS OF INTERFACE PLY ANGLE EFFECTS ON STRESS DISTRIBUTION AND FAILURE FORCE OF COMPOSITE JOINT

Abstract

Abstract: To study the relations between joint failure force and ply angle of Ply Adjacent to Adhesive Layer (PAAL), designed a series of single-lap joints with same tensile modulus and bending modulus adherends but different orientation angles of PAAL, to analysis the effects of PAAL on stress distribution, using Finite Element Method (FEM) to model the adhesively bonded composite single-lap joints with different stacking sequences, stresses of adhesive layer and PAAL were analyzed, and introduced a failure index with Tsai-Wu failure criterion to compare the failure level of PAALs. The result shows the ply orientation of PAAL cause stress variation, with 0°, the stress of adhesive layer is highest, when the stress and failure index of PAAL is lowest; with 90°, the stress of adhesive layer is lowest, when the stress and failure index of PAAL is highest; the stress level of adhesive layer and failure index level of PAAL with 45° are between the results of 0° and 90°. A common rule was achieved by comparing the result and experiments data.

Key words: composite, stress analysis, stacking sequence, adhesive bonding, joint design, FEM

CLC Number:

TB332

PENG Hai-jun,QIN Zhi-wen,WANG Ji-hui,YANG Ke. ANALYSIS OF INTERFACE PLY ANGLE EFFECTS ON STRESS DISTRIBUTION AND FAILURE FORCE OF COMPOSITE JOINT[J]. Fiber Reinforced Plastics/Composites, 2017, 0(4): 29-34.

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