Ultrasonic Plate Waves in 3-D Braided Composites

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1993
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Chimenti, Dale
Nayfeh, Adnan
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Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

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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Conventional composite laminates draw their strength from high-modulus fibers placed in a single direction within each of many individual plies comprising a multilayer laminate. The plies are arranged in various directions in the plane of the laminate to tailor the stiffness of the finished part. However, the material is designed so that fibers from different layers do not communicate — or cross each others’ plane. This situation leads to relatively low tensile strength normal to the plane of the plies. In practice, this construction geometry means that the laminate is susceptible to damage in impact, where plies tend to come unbonded. After impact, the overall laminate strength, particularly the in-plane compressional strength, can be seriously impaired.

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Fri Jan 01 00:00:00 UTC 1993