Numerical Implementation of Constitutive Material Law for Simulating the Kinkband Formation in Fiber Composites

Abstract:

Finite element models with a constitutive material behavior that represents the non-linear response of fiber composites are used to simulate the compressive failure mechanism i.e. kinkband formation. A constitutive material law in framework of micromechanical modeling containing comprehensive constitutive equations for the constituent materials is adopted to model the non-linear behavior of the unidirectional layered materials. This material law is implemented as UMAT user subroutine in ABAQUS/Standard to study kinkband formation. The methodology provides a procedure to investigate the kinkband formation due to fiber misalignment for various complex structures having voids and material discontinuities that occur normally during the manufacture of these unidirectional fiber composites.

• Periodical: Key Engineering Materials (Volumes 488-489)
• Pages: 472-475
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.488-489.472
• Online since: September 2011
• Authors: Badrinath Veluri, Henrik Myhre Jensen
• Keywords: Compressive Strength, Constitutive Model, Fiber Composites, Finite Element Analysis (FEA), Kinkband, Microbuckling, Strain Localization

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