Improvement of impact resistance of plain-woven composite by embedding superelastic shape memory alloy wires
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RESEARCH ARTICLE
Xiaojun GU, Xiuzhong SU, Jun WANG, Yingjie XU, Jihong ZHU, Weihong ZHANG
Improvement of impact resistance of plain-woven composite by embedding superelastic shape memory alloy wires
© Higher Education Press 2020
Abstract Carbon fiber reinforced polymer (CFRP) composites have excellent mechanical properties, specifically, high specific stiffness and strength. However, most CFRP composites exhibit poor impact resistance. To overcome this limitation, this study presents a new plainwoven CFRP composite embedded with superelastic shape memory alloy (SMA) wires. Composite specimens are fabricated using the vacuum-assisted resin injection method. Drop-weight impact tests are conducted on composite specimens with and without SMA wires to evaluate the improvement of impact resistance. The material models of the CFRP composite and superelastic SMA wire are introduced and implemented into a finite element (FE) software by the explicit user-defined material subroutine. FE simulations of the drop-weight impact tests are performed to reveal the superelastic deformation and debonding failure of the SMA inserts. Improvement of the energy absorption capacity and toughness of the SMACFRP composite is confirmed by the comparison results. Keywords carbon fiber reinforced polymer composite, shape memory alloy wire, impact resistance, drop-weight test, finite element simulation
Received January 8, 2020; accepted March 20, 2020
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Xiaojun GU, Jun WANG ( ) Unmanned System Research Institute, Northwestern Polytechnical University, Xi’an 710072, China E-mail: [email protected]
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Xiaojun GU, Xiuzhong SU, Jun WANG, Yingjie XU ( ), Jihong ZHU, Weihong ZHANG State IJR Center of Aerospace Design and Additive Manufacturing, Northwestern Polytechnical University, Xi’an 710072, China E-mail: [email protected] Yingjie XU, Jihong ZHU Shaanxi Engineering Laboratory of Aerospace Structure Design and Application, Northwestern Polytechnical University, Xi’an 710072, China
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Introduction
Carbon fiber reinforced polymer (CFRP) is an extremely strong and lightweight composite material. Owing to its high specific mechanical properties, CFRP is used in a wide variety of engineering applications, such as in aerospace, automotive, electromechanical, and biomedical fields. However, most CFRP composites exhibit poor impact resistance, mainly because the localized impact loading leads easily to delamination within the thickness of the composite and debonding in the interface between the fiber and matrix. In engineering practice, improving the impact resistance of CFRP composites remains a challenging issue. In recent years, an increasing number of researchers [1–3] have paid attention to this topic. For example, Cantwell and Morton [4], Richardson and Wisheart [5], and Agrawal et al. [6] summarized related studies on the impact behavior of fiber-reinforced composites. Over the last decades, substantial effort was exerted to reveal the impact behavior and fracture mechanism of CFRP composites. Meanwhile, various approaches were proposed to im
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