Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 212, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2021.108880
Keywords
Bistable hybrid composite laminates; Bimetallic strip; Contactless drive; Analytical model
Categories
Funding
- National Natural Science Foundation of China [52075492, 51675485, 51775510, 11972323]
- Zhejiang Province Natural Science Foundation of China [LQ21A020003, LR18E050002, LR20A020002]
- Zhejiang Province [20201201002]
- Open Fund of Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education
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A novel bistable hybrid composite laminate embedded with bimetallic strips was designed, combining stable-state characteristics with temperature-sensing characteristics. A contactless method deforms the bimetallic strip through the temperature field to drive the bistable laminate and control curvature. The new laminates have different curvatures in different stable states, and can be easily driven by changing ambient temperature.
A novel bistable hybrid composite laminate embedded with bimetallic strips was designed by combining the stable-state characteristics of the bistable laminate with the temperature-sensing characteristics of the bimetallic strip described in this paper. A contactless method that deforms the bimetallic strip through the temperature field, driving the bistable laminate, is proposed. Firstly, an analytical method based on Dano's theory was developed to determine the principal curvature of the laminates, and qualitative and quantitative comparisons between theoretical, experimental, and numerical results were conducted and showed good agreement. Then, the influence of bimetallic strip characteristics such as the thickness, width, and material properties, along with the aspect ratio of the laminates, on the principal curvature were examined. In addition, the reciprocating drive of the laminates was realized by changing the temperature generated by a thermal field, and the effect of the bimetallic strip arrangement was also studied. Compared with the conventional square bistable cross-ply laminates, it was found that the new laminates have different curvatures in two stable states. In particular, they can be easily driven by changing the ambient temperature (contactless drive), without requiring complicated external driving devices. This study provides theoretical support and a new driving method for the design of adaptive and deployable structures.
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