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Title: A Hybrid Multi-Scale Model of Crystal Plasticity for Handling Stress Concentrations

Microstructural effects become important at regions of stress concentrators such as notches, cracks and contact surfaces. A multiscale model is presented that efficiently captures microstructural details at such critical regions. The approach is based on a multiresolution mesh that includes an explicit microstructure representation at critical regions where stresses are localized. At regions farther away from the stress concentration, a reduced order model that statistically captures the effect of the microstructure is employed. The statistical model is based on a finite element representation of the orientation distribution function (ODF). As an illustrative example, we have applied the multiscaling method to compute the stress intensity factor K I around the crack tip in a wedge-opening load specimen. The approach is verified with an analytical solution within linear elasticity approximation and is then extended to allow modeling of microstructural effects on crack tip plasticity.
Authors:
 [1] ; ORCiD logo [1] ;  [2]
  1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Naval Architecture and Marine Engineering
  2. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Aerospace Engineering
Publication Date:
Grant/Contract Number:
SC0008637
Type:
Accepted Manuscript
Journal Name:
Metals
Additional Journal Information:
Journal Volume: 7; Journal Issue: 9; Journal ID: ISSN 2075-4701
Publisher:
MDPI
Research Org:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; plastic deformation; texture; finite element analysis; simulation; theory
OSTI Identifier:
1423802