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

Sun, Shang; Ramazani, Ali; Sundararaghavan, Veera

doi:10.3390/met7090345

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

Journal Article · Mon Sep 04 00:00:00 EDT 2017 · Metals

DOI:https://doi.org/10.3390/met7090345· OSTI ID:1423802

Sun, Shang ^[1];

^[1]; Sundararaghavan, Veera ^[2]

Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Naval Architecture and Marine Engineering
Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Aerospace Engineering

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.

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Research Organization:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0008637

OSTI ID:: 1423802

Journal Information:: Metals, Vol. 7, Issue 9; ISSN 2075-4701

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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References (13)

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Cited By (1)

PRISMS: An Integrated, Open-Source Framework for Accelerating Predictive Structural Materials Science Aagesen, L. K.; Adams, J. F.; Allison, J. E. JOM, Vol. 70, Issue 10 https://doi.org/10.1007/s11837-018-3079-6	journal	August 2018

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