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Title
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Damage and failure mechanisms of 3D weft-knitted spacer fabric reinforced composite under flexural load
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Type
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Refereeing
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Keywords
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Damage and failure mechanism, Puck failure criterion, Finite element, 3D weftknitted spacer fabric reinforced composites, meso-macro
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Abstract
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This study presents a damage progressive based finite element model to investigate the damage and failure mechanism of 3D weft-knitted spacer fabric reinforced composites under flexural load. A representative volume element (RVE) of the composite in the meso scale was modeled in the ABAQUS software and the stiffness matrix of the composite was extracted by applying periodic boundary conditions. In order to obtain the damage mechanism of the composite, the Puck criterion was utilized. For this purpose, a VUMAT code was written to predict damage progressive in the composite under tensile and pressure loads. All parameters (elastic and failure) which were extracted from the meso model were used for the macro model under flexural load. In the macro model, the Hashin failure model that is available in the ABAQUS environment was utilized for damage of the composite. The results of the numerical model were compared with experimental outputs. The results of the proposed model showed good agreement with experimental results in the linear and nonlinear regime of the load-deflection curve. The numerical results show this model could be used for other composite preforms under various loads to predict damage and failure mechanism of the composite.
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Researchers
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Hadi Ghashochi Bargh (Referee)
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