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An Experimental Investigation of Combined Symmetric-Asymmetric Composite Laminates

Department of Mechanical Engineering, Clemson University, Clemson, SC 29634, USA
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Author to whom correspondence should be addressed.
Current address: Flour Daniel Engineering Innovation Building, 218 S Palmetto Blvd, Clemson, SC 29631, USA.
J. Compos. Sci. 2019, 3(3), 71; https://doi.org/10.3390/jcs3030071
Received: 11 April 2019 / Revised: 10 June 2019 / Accepted: 3 July 2019 / Published: 10 July 2019
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Abstract

It has been found that certain asymmetric composite laminates exhibit bistability, where the composite laminate exhibits multiple stable static equilibrium states. If the bistable composite is actuated, it will snap to its secondary equilibrium state and then remain there without further actuation. This study investigates how the amount of symmetry in a combined symmetric asymmetric rectangular laminate under an imposed clamped edge boundary condition affects the bistability and the curvature of the laminate. Laminates with varying amounts of asymmetry were fabricated and then measured using a profilometer to capture the curvatures of the equilibrium shapes. The results showed that up to 20% symmetry can be introduced in the laminate without a substantial loss in snap through curvature, and that up to 83% symmetry can be introduced in the laminate before bistability is lost. Finite element simulations were conducted in Abaqus and showed good correlation with the experimental results. View Full-Text
Keywords: bistable; bistability; asymmetric; composite; laminates bistable; bistability; asymmetric; composite; laminates
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Kemmann, G.; Myers, O. An Experimental Investigation of Combined Symmetric-Asymmetric Composite Laminates. J. Compos. Sci. 2019, 3, 71.

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J. Compos. Sci. EISSN 2504-477X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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