Dynamic Testing of Composite Materials

Abstract

The theoretical and experimental principles of the dynamic testing of composites are described. The example of a steel-aluminum bar, for which three independent elastic constants were accurately determined, is presented in detail. For epoxy resin systems, however, only the longitudinal Young's modulus could be measured dynamically. Certain peculiarities arising from the anisotropy of the material are pointed out, and further applications and limitations of the method are discussed. Dispersion relations for longitudinal and torsional sound waves in thin ba-s with orthorhombic symmetry are derived in the Appendix.

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