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Reversible Rail Shear Apparatus Applied to the Study of Woven Laminate Shear Behavior
Authors:T Rouault  C Bouvet  V Nègre  P Rauch
Institution:1. Université de Toulouse; ISAE, INSA, UPS, EMAC; ICA (Institut Clément Ader); ISAE, 10 av. E. Belin, 31055, Toulouse, France
2. Eurocopter, 13725, Marignane, France
Abstract:The multitude of in-plane shear tests existing in the literature seems to demonstrate the complexity of developing a test adapted to all experimental works. In a general framework of investigation of translaminar cracks in thin laminates, a test able to reproduce a pure in-plane shear loading was required. The laminate studied is notably employed as helicopter blade skin, and cyclic torsion induced by aerodynamic load involves cyclic in-plane shear. This particular application established some specifications for the test needed to carry out this study. To comply with them, an original technological solution has been developed from a three-rail shear test apparatus. This paper describes the resulting “reversible rail shear test” solution and its application to the study of in-plane shear behavior of a thin glass-epoxy laminate. The results concern plain and notched coupons under quasi-static loading, and crack growth tests under cyclic loading.
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