Reflection and Transmission Phenomena for Transient Stress Waves in Fiber Composite Laminates
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
The problem which we investigate here arises from our earlier results [1] which are reproduced in Fig. 1. This figure shows the upper surface and lower surface normal displacement for three different fiber composite laminates due to a line load impact acting on the upper surface in each case. The laminates are constructed of layers of the same fiber composite material, perfectly bonded together. Each layer consists of a family of parallel strong elastic fibers lying in the plane of the layer and embedded in an isotropic elastic matrix. The three laminates to which the results in Figure 1 relate are a symmetric four-ply plate with (90°/0°) s configuration, a six-ply plate with layers arranged in a (−60°/60°/0°) s configuration and a quasi-isotropic eight-ply plate with layer configuration (90°/ −45°/45°/0°) s.