Work

Interfacial Fatigue and Discrete Interfacial Damage in a Finite Strain Thermomechanical Framework

Year: 2020

Type: article

Abstract: We present a stabilized finite element method for thermomechanical problems in the class of materials with discrete microstructural interfaces that undergo interfacial fatigue and dominant interfacial damage. This formulation is applicable to polycrystalline solids, fibrous composites, filled elastomers, and additively manufactured layered materials. A finite strain formulation for monolithically coupled thermomechanical fields is presented where interfacial kinematic models for low-cycle fatigue and for strong interfacial discontinuities are variationally embedded at the interfaces. Formulation is written in the spatial configuration to account for large local strains and finite rotations of the interfaces. The method is implemented employing the family of low-order 3D Lagrange elements comprised of linear hexahedra and linear tetrahedra. A set of benchmark problems is presented to show the mathematical and algorithmic attributes of the method.

Source: International Journal of Structural Stability and Dynamics

DOI: 10.1142/s0219455420430130

Authors: Pinlei Chen, Ignasius P. A. Wijaya, Arif Masud

Institutions: Pennsylvania State University, University of Illinois Urbana-Champaign

Language: English

Topic: Numerical methods in engineering

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Air Force Research Laboratory

Awards: G2982106061, G4247196213, A Hierarchical Multiscale Method for Nonlocal Fine-scale Models via Merging Weak Galerkin and VMS Frameworks