| METALS AND METAL MATRIX COMPOSITES |
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| Progressive Failure Analysis of Titanium Alloy-Aramid Fiber Composites Single Lap Joints |
| ZOU Tianchun, QIN Jiaxu, LI Longhui, FU Ji, LIU Zhihao, MOU Haolei
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| College of Airworthiness, Civil Aviation University of China, Tianjin 300300, China |
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Abstract Single lap joints were made of titanium alloy and aramid fiber composites. Using DIC, strain acquisition system and OM, the joints strain and failure modes under tensile load were characterized, and the strain fields and failure morphology of joints at different time were analyzed. The failure modes of dissimilar materials bonded joints were studied. The results show that the shear and peeling stress at the top of composites is concentrated, and the joint is firstly failure from here. After starting failure, a high tensile strain region appears on the surface of composites, and a high bending strain region appears on the surface of titanium alloy, and the two regions move along the debonding direction. The tensile and bending stress of adherend at the edge of remaining bonding region is further increased, which causes the joints have a further failure. The joints appear in sequence with the failure of composites delamination and the interfacial failure between the titanium alloy and adhesive.
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Published: 06 November 2020
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About author:: Tianchun Zoureceived his B.E. degree in materials science and engineering from Beihang University in 1999 and received his Ph.D. degree in Material Scie-nce from the School of Material Science and Enginee-ring, Tianjin University, in 2007. He is currently an associate professor in Civil Aviation University. His research has focused on composite, emphatically on additive manufacturing in recent years
Jiaxu Qinis a postgraduate student at the College of Airworthiness, Civil Aviation University of China, under the guidance of associate professor Tianchun Zou. Mainly engaged in the research of composite material connection technology. |
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2020, Vol. 34 
