4.7 Article

Measurement of the properties of woven CFRP T300/914 at different strain rates

Journal

COMPOSITES SCIENCE AND TECHNOLOGY
Volume 60, Issue 15, Pages 2829-2834

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/S0266-3538(00)00151-2

Keywords

carbon fibres; layered structures; mechanical properties; stress/strain curves; strength

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Three types of test, i.e. tension, compression and in-plane shear, have been carried out to measure the in-plane mechanical properties of woven CFRP T300/914 laminates at three different strain rates. Specimens were waisted symmetrically in the thickness direction. Difficulties presented in testing specimens with 90 degrees reinforcement in compression and [+/-45] in tension at high strain rate are discussed. To obtain the modulus in [90] compression and in [+/-45] tension at high strain rate, specimens with uniform thickness have to be used. Results show linear elastic properties in both of the [0] and [90] directions. Under tension, the specimens remain virtually linear elastic up to failure. Plastic deformation occurred before total failure in compression tests. Tensile tests on [+/-45] specimens give non-linear stress strain curves. Results show that properties dominated by matrix, i.e. compression strength, Poisson's ratio and in-plane shear modulus and shear strength are strain rate dependent and properties dominated by the fibres, such as tensile modulus and strength in [0] and [90] directions are virtually rate independent. (C) 2000 Elsevier Science Ltd. All rights reserved.

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