Article (Scientific journals)
Implementation of a new strain split to model unilateral contact within the phase field method
Nguyen, Thanh Tung; Yvonnet, Julien; WALDMANN, Danièle et al.
2020In International Journal for Numerical Methods in Engineering
Peer reviewed
 

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Keywords :
Fracture; Phase eld model; Spectral decomposition; Anisotropy; Contact condition
Abstract :
[en] A new orthogonal decomposition of strain tensor into compressive/tensile parts is implemented in the phase eld model to maintain the physical crack propagation behavior. An e cient operator split scheme with the introduction of projection tensors is proposed to facilitate the numerical implementation of the new spectral decomposition. Formulations of the present failure model accounting the unilateral contact condition are given analytically and explicitly, which implies an extremely robust computational model. In particular, compared to the existing models, the present framework is general, which can be applied to all possible elastic behavior, such as isotropic, orthotropic, and totally anisotropic elastic material. A detailed comparison of fracture response predicted by the present models with the literature approaches is then provided. It is shown that orthogonal decomposition is able to simulate various failure scenarios. Especially, this formulation shows a very remarkably prediction compared to experimental observation for the case of compression load.
Disciplines :
Civil engineering
Author, co-author :
Nguyen, Thanh Tung
Yvonnet, Julien
WALDMANN, Danièle ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
He, Qi-Chang
External co-authors :
yes
Language :
English
Title :
Implementation of a new strain split to model unilateral contact within the phase field method
Publication date :
06 June 2020
Journal title :
International Journal for Numerical Methods in Engineering
Peer reviewed :
Peer reviewed
Focus Area :
Computational Sciences
Available on ORBilu :
since 08 June 2020

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