Journal
COMPOSITE STRUCTURES
Volume 258, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2020.113331
Keywords
Snap-through; Bi-stable; Composite laminate; Hybrid; Symmetric
Categories
Funding
- National Natural Science Foundation of China [11772107]
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This paper focuses on studying the snap-through behavior of a family of bi-stable plates constructed by hybrid symmetric laminates with a cantilever boundary. The results show that lay-up design and length are important parameters that affect the characteristics of this bi-stable laminate, and also reveal the nonlinear structural behavior of the structure.
This paper focuses on a study of the snap-through behavior of a family of bi-stable plates constructed by hybrid symmetric laminates with a cantilever boundary. Involving shape change and actuation demand, a deep understanding of the snap-through behavior is of particular importance since this bi-stable laminate is often served as a host structure of energy harvester or a morphing structure. The snap-through behavior is obtained using two displacement-controlled finite element procedures provided in the commercial software ABAQUS and the results are verified by experiments. The entire equilibrium path of reaction force-displacement response with a couple of zero load crossings is captured by the `Static, Riks' procedure to reveal the potential nonlinear structural behavior. The practical situation of the reaction force-displacement curve is obtained by the `Static, General' procedure which exhibits consistent results with experiments. Several characteristics, such as snap down, hysteresis, negative stiffness, and even zero stiffness are captured. A parametric study including lay-up design and length is also carried out using the finite element model and verified by experiments. The results show that the lay-up design not only can fundamentally change the snap-through response but also influences other characteristics of this bi-stable laminate including stable shape, and the length is a relatively reliable parameter to alter the snap-through features, e.g. peak force and hysteresis performance.
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