Twisted shape bi-stable structure of asymmetrically laminated CFRP composites

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• 作者：Hyeok Lee^a ; Jong-Gu Lee^a ; Junghyun Ryu^b ; Maenghyo Cho^a ; ^{mhcho@snu.ac.kr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Carbon fibre ; Analytical modelling ; Laminate mechanics ; Finite element analysis(FEA)
• 刊名：Composites Part B: Engineering
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：108
• 期：Complete
• 页码：345-353
• 全文大小：1534 K

文摘

Carbon fiber reinforced plastic (CFRP) laminated composites, called bi-stable composites, are applied as soft morphing host structural component. These bi-stable composites have two cylindrical stable states which have parallel direction between fiber direction of composites and principle curvature of bi-stable shape. Their final curvature can be tailored by the initial curvature. However, the cross-ply composites have twisted shape in a certain negative initial curvature. These twisted shapes also have bi-stability. Herein, the reasons for the twisted shapes are discussed from a mechanical perspective. In addition, the twisted shape was simulated by a developed analytical model considering the discussed mechanical mechanism. The simulation results show that the CFRP laminated composites have two kinds of bi-stable states (conventional shape or twisted shape) and a mono-stable state with respect to the negative initial curvature. These analytical results were verified by comparing them with those obtained by finite element analysis (FEA).