Material index for strain localization susceptibility in cracked bodies: Examination of single‐crystal Cu using crystal plasticity finite element method

Our previous study demonstrated that, in a cracked single‐crystal subjected to remote tensile stress, the interactions among material behavior, strain localization, mechanical behavior, and strain concentration caused the formation of a strain field was quite different from the HRR singularity intro...

Full description

Saved in:
Bibliographic Details
Published in:Fatigue & fracture of engineering materials & structures 2022-11, Vol.45 (11), p.3137-3153
Main Authors: Li, Wanjia, Hamada, Shigeru, Noguchi, Hiroshi
Format: Article
Language:English
Subjects:
crack
Crack tips
crystal plasticity
Crystallography
Edge dislocations
Finite element analysis
Finite element method
Heat treating
Localization
material index
Mechanical properties
non‐crystallographic shear band
Plastic deformation
Plastic properties
Shear bands
Single crystals
Strain concentration
Strain localization
strain localization susceptibility
Tensile stress
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Our previous study demonstrated that, in a cracked single‐crystal subjected to remote tensile stress, the interactions among material behavior, strain localization, mechanical behavior, and strain concentration caused the formation of a strain field was quite different from the HRR singularity introduced in the homogeneous continuum. Moreover, to quantify strain localization ability for metals, a material index for strain localization susceptibility (SLS) was proposed. However, the effectiveness and availability of that index were not examined in detail. In this study, a Cu‐based single crystal was examined using the crystal‐plasticity finite element method (CPFEM) model. This model incorporates the strain localization mechanism from the non‐crystallographic shear band. Additionally, a new material index for SLS was introduced. The results showed that the new material index could reflect the SLS of the material. Meanwhile, a critical material index value based on strain localization was determined for predicting the crack behavior. This study also discusses the plastic deformation behavior near the crack tip with different material indices for SLS. Highlights Crystal plasticity finite element model for crack with strain localization. A new material index for strain localization susceptibility. Deformation behavior near the crack tip for material with different strain localization susceptibility.
ISSN:8756-758X
1460-2695
DOI:10.1111/ffe.13803