Radical proposal for in-plane shear testing of fibrous composite laminates
Because of inherent difficulties in testing composite laminates and laminae under inplane shear loads, a tensile test of a +/- 45-degree laminate is customarily substituted for a shear test of a 0/90-degree laminate. The tensile test strength is divided by two and called the in-plane shear strength, which is a resin-dominated property in this case. Such a correlation is based on the maximum-shear-stress failure criterion for ductile isotropic materials. This paper proposes that the fiber-dominated in-plane shear strength of a +/- 45-degree laminate be likewise taken as half the tensile strength of a 0/90-degree laminate. If the tensile and compressive strengths differ appreciably, as with many of the new high-strain fibers, the shear strength would be evaluated by a formula developed from theory. 11 references, 11 figures.
- Research Organization:
- McDonnell Douglas Corporation, Long Beach, CA (USA)
- OSTI ID:
- 5219552
- Journal Information:
- SAMPE Q.; (United States), Journal Name: SAMPE Q.; (United States) Vol. 19:1; ISSN SAMQA
- Country of Publication:
- United States
- Language:
- English
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