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An investigation of the Iosipescu and Asymmetrical Four-Point Bend tests for composite materials (1985)

Spigel, B. S. ; Prabhakaran, R. ; Sawyer, J. W.

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Publication Date: 2011-08-19

Description: The results of an extensive analytical and experimental investigation of the Iosipescu and Asymmetrical Four-Point Bend (AFPB) test methods are summarized. Finite element analyses were used to assess the influence of notch parameters and load locations on the stress state in the specimens. The shear moduli and shear strengths were experimentally measured for quasi-isotropic graphite-epoxy laminates using both the Iosipescu and the AFPB test methods with various combinations of notch parameters and load locations. The test results indicate that changes in the notch geometry and load locations aimed at improving the stress distribution in the test section result in unexpected changes in the failure mode.

Keywords: COMPOSITE MATERIALS

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