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

Abstract

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 KI 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:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1423802
Grant/Contract Number:  
SC0008637
Resource Type:
Accepted Manuscript
Journal Name:
Metals
Additional Journal Information:
Journal Volume: 7; Journal Issue: 9; Journal ID: ISSN 2075-4701
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; plastic deformation; texture; finite element analysis; simulation; theory

Citation Formats

Sun, Shang, Ramazani, Ali, and Sundararaghavan, Veera. A Hybrid Multi-Scale Model of Crystal Plasticity for Handling Stress Concentrations. United States: N. p., 2017. Web. doi:10.3390/met7090345.
Sun, Shang, Ramazani, Ali, & Sundararaghavan, Veera. A Hybrid Multi-Scale Model of Crystal Plasticity for Handling Stress Concentrations. United States. doi:10.3390/met7090345.
Sun, Shang, Ramazani, Ali, and Sundararaghavan, Veera. Mon . "A Hybrid Multi-Scale Model of Crystal Plasticity for Handling Stress Concentrations". United States. doi:10.3390/met7090345. https://www.osti.gov/servlets/purl/1423802.
@article{osti_1423802,
title = {A Hybrid Multi-Scale Model of Crystal Plasticity for Handling Stress Concentrations},
author = {Sun, Shang and Ramazani, Ali and Sundararaghavan, Veera},
abstractNote = {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 KI 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.},
doi = {10.3390/met7090345},
journal = {Metals},
number = 9,
volume = 7,
place = {United States},
year = {2017},
month = {9}
}

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