Acoustoelasticity is a nondestructive technique used for determining applied and residual stresses in structural materials. It is based on the fact that as a material undergoes deformation, the longitudinal and shear wave speeds change. This technique has been successfully used in slightly anisotropic materials such as rolled aluminum plates. The purpose of this study is to examine the acoustoelastic response in layered composites: materials which are extremely anisotropic. The acoustoelastic response of these polymers is highly nonlinear and very different than that of metals.

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