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Article Dans Une Revue Computer Methods in Applied Mechanics and Engineering Année : 2021

Anisotropic elastoplastic phase field fracture modeling of 3D printed materials

Résumé

A phase field model for anisotropic, elastoplastic fracture model in layered structures obtained by 3D printing processes is proposed. An extension of anisotropic phase field to elastoplasticity model is developed. The model is able to describe a transition from quasi-brittle to elastoplastic fracture behaviors depending on the angle of layers in the microstructure with respect to the external loading. Such feature is of special interest to describe the anisotropic fracture behavior in layered 3D printed materials. The present model introduces two phase field variables, one bulk fracture damage and one micro interfacial damage variables, describing two different micro damage mechanisms. Finally, we have proposed an original methodology to identify the macroscopic strain density as a function of the micro interfacial damage variable using numerical homogenization on Representative Volume Elements. Numerical investigations show that the present model is convergent with respect to mesh refinement, and allows to describe complex crack initiation and propagation in layered elastoplastic structures. An experimental comparison is provided to validate the use of such model for 3D printed polymer materials.
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Dates et versions

hal-03322435 , version 1 (19-08-2021)

Identifiants

Citer

Pengfei Li, Julien Yvonnet, Christelle Combescure, Hamid Makich, Mohammed Nouari. Anisotropic elastoplastic phase field fracture modeling of 3D printed materials. Computer Methods in Applied Mechanics and Engineering, 2021, 386, pp.114086. ⟨10.1016/j.cma.2021.114086⟩. ⟨hal-03322435⟩
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