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Bearing failure in bolted composite joints: analytical tools development

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This paper presents an analytical tool development for simulating the bearing failure and response of bolted composite joints. It is implemented into a general-purpose finite element code ABAQUS. The main damage mechanisms observed from the experiments are described as accumulated compressive damage, induced by shear and compression failures of fiber and matrix. The contact problem at the pin/hole boundary, progressive damage, finite deformation and nonlinear material behavior are taken into account when developing the analytical tool. A complex approach based on a nonlinear shear elasticity theory combined with a continuum damage mechanics approach can also be utilized to represent the nonlinear material behavior during loading. The damage accumulation criteria based on the hybrid failure criteria of Hashin and Yamada-Sun are adopted, and a degradation model for the damaged ply is proposed for the stress redistribution analysis. The computed results, including progressive damage and strength response of the joints, agreed well with the existing experimental data.
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Keywords: Cfrp laminated composites; bearing failure; continuum damage; mechanics (CDM).; progressive damage

Document Type: Research Article

Publication date: 2002-12-01

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