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A Phase Field Model for the Fracture of Micropolar Medium Considering the Tension-Torsion Coupling Effect

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1 Harbin Institute of Technology, 92 West Dazhi Street, Nangang District, Harbin, 150001, China

* Corresponding Author: Hongjun Yu. Email:

The International Conference on Computational & Experimental Engineering and Sciences 2024, 29(1), 1-1. https://doi.org/10.32604/icces.2024.011454

Abstract

A novel and irreversible phase field model accounting for tension-torsion coupling effect and size-effect is constructed in the context of continuum thermodynamics. First, a general framework considering the energy dissipation process influenced by micro and macro force is formulated according to thermodynamically consistent derivation. Next, the framework is specialized by introducing a material parameter called chiral coefficient to characterize the tension-torsion coupling effect within macro force constitutive according to isotropic micropolar elasticity theory. To gain insight of the chiral effect on the fracture behaviors, the analytical solution of uniaxial traction chiral rod is provided based on the proposed model. Besides, the proposed model is numerical implemented with finite element method and applied for exploring the fracture behaviors of chiral medium. The simulations demonstrate both the chiral coefficient and the bending characteristic length affect the damage profiles and global responses significantly, indicating the proposed method provide a proper way to identify such material parameters.

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Keywords

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