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Effect of Lap Length on the Adhesive-bonded Single-lap Composite Joints |
GUO Xia1, GUAN Zhidong1, LIU Sui1, KONG Jiaoyue2, YAN Dongxiu2, QIAO Liuping2 |
1. School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;2. Shanghai Aircraft Manufacturing CO., Ltd., Commercial Aircraft Corporation of China, Ltd., Shanghai 200436, China |
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Abstract: The tensile performance of the adhesive-bonded single-lap composite joints is studied by the finite element modeling. The effect of the lap length on the tensile properties is analyzed with respect to the stress distribution and the failure mode. It is shown that: when the lap length changes from 5mm to 45mm, the minimum shear stress gradually decreases; when the lap length is greater than 20mm, the effect of the lap length on the stress distribution is decreased; the failure load increases gradually with the lap length; the increase rate is reduced when the lap length is greater than 20mm; the failure mode of a single lap joint is to start from the edge of the adhesive -composite interface, and then the adhesive damage. The lap length affects the damage level.
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Received: 19 December 2012
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