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Development of a new nonlinear numerical material model for woven composite materials accounting for permanent deformation and damage

Abstract : Due to their draping, stiffness, improved ductility and damage tolerance properties woven composites are being increasingly used for the construction of crash-relevant structural parts. Textile composites may depict a nonlinear behavior along several directions. Moreover, considerably-thick composite structures are likely to be used in order to increase energy absorption and to comply with the crash validation criteria. Therefore, a nonlinear numerical material model for textile composite materials has been developed for shells and thick shells. The model has been implemented as a user-defined subroutine (UMAT) in the LS-DYNA finite element code featuring with explicit time integration. The nonlinear behavior until failure is modeled in each in-plane material direction by a user-defined load curve or the Ramberg–Osgood equation. A plasticity formulation coupled with the nonlinearity accounts for permanent deformations. The failure is predicted using either a maximal stress criterion or the quadratic Tsai–Wu criterion. In order to model damage propagation, different post-failure damage definitions have been developed and implemented for each main in-plane material direction. A smeared formulation ensures the mesh independence in the presence of strain localization. The model has been assessed using characterization tensile and compressive tests on plain-weave and twill-weave carbon fiber composites.
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https://hal-uphf.archives-ouvertes.fr/hal-03613717
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Submitted on : Friday, March 18, 2022 - 4:34:27 PM
Last modification on : Monday, May 2, 2022 - 5:06:06 PM

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Olivier Cousigné, David Moncayo, Daniel Coutellier, Pedro Camanho, Hakim Naceur, et al.. Development of a new nonlinear numerical material model for woven composite materials accounting for permanent deformation and damage. Composite Structures, Elsevier, 2013, 106, pp.601-614. ⟨10.1016/j.compstruct.2013.07.026⟩. ⟨hal-03613717⟩

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