Modeling and Design of a Class of Hybrid Bistable Symmetric Laminates with Cantilever Boundary Configuration

A Mukherjee (Indian Institute of Technology Madras, India), MI Friswell (Swansea University), SF Ali & A Arockiarajan (Indian Institute of Technology Madras, India)

Composite Structures, Vol. 239, 1 May 2020, paper 112019


Multistable laminates have been widely analyzed in the recent past for their potential in morphing applications. However, all the analytical models developed up until now have taken into account only the free-free boundary condition. In this work two objectives are met: (a) an analytical model is developed, which extends the previously available models in literature to account for the cantilever boundary condition for a special class of hybrid bistable symmetric laminates (HBSL); (b) the previously proposed HBSL is modified by replacing the aluminum layers with bi-direction glass-epoxy prepregs in the layup. It is observed that the modified layup has a curvature similar to the previously proposed HBSL while maintaining bistability. The analytical model developed here successfully captures the equilibrium shapes and the snap-through behavior for this special class of laminates which is validated against the results obtained using ABAQUS and experiments. The developed model is then subsequently used to study the design space and bistability characteristics of the HBSL and the proposed modified layup (m-HBSL) in the cantilever boundary condition.

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This material has been published in the Composite Structures, Vol. 239, 1 May 2020, paper 112019. Unfortunately the copyright agreement with Elsevier does not allow for the PDF file of the paper to be available on this website.

Link to paper using doi: 10.1016/j.compstruct.2020.112019

Composite Structures