Computational study of the influence of microstructure on fracture behavior near crack-tip field in nacre-like materials

Ye, Xiaoyan; Nakatani, Akihiro

Mechanics of Materials, 2024, 195, 105034

Number of Access:292（2025-09-03 06:03 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/97649

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Title
Computational study of the influence of microstructure on fracture behavior near crack-tip field in nacre-like materials
Creator
CreatorName
Ye, Xiaoyan
NRID
1000050252606 1000050252606
ORCID
0000-0001-7212-9303 0000-0001-7212-9303
researchmap permalink
akihironakatani akihironakatani
Scopus Author ID
7005104428 7005104428
CreatorName
Nakatani, Akihiro
Subject
Fracture mechanism
Nacre-like materials
Near crack-tip field
Small-scale failure
Toughness
Description
Ye X., Nakatani A.. Computational study of the influence of microstructure on fracture behavior near crack-tip field in nacre-like materials. Mechanics of Materials 195, 105034 (2024); https://doi.org/10.1016/j.mechmat.2024.105034.
Abstract
The small-scale failure process around a plane strain mode I crack in nacre-like materials is analyzed. The displacement increments of boundary nodes are specified by the analytical solutions based on the orthotropic linear elasticity to conduct an incremental finite element analysis. We set up a structural model composed of staggered arranged brittle aragonite tablets and cohesive zones within a process window surrounding the crack tip to investigate the toughness as well as the deformation mechanism in the fracture process zone. The results obtained by the parametric studies of different geometries and mechanical properties in the microstructure of the materials show that the aspect of failure in the near-tip fields can be categorized into four distinct fracture mechanisms. These mechanisms significantly affect the fracture toughness with differences of hundreds of times. We show a failure-mechanism map in which these fracture mechanisms can be divided into regions of geometry and mechanical properties in microstructure. Findings obtained in this study about the toughening mechanisms give us the useful knowledge to design novel materials with specific microstructures to control fracture mechanisms.
Publisher
Elsevier B.V.
Source Title
Mechanics of Materials
Volume (Issue)
195
Page
105034
Date of Issued
2024-08-01
Language
English
Handle URL
https://hdl.handle.net/11094/97649
PISSN
01676636
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.mechmat.2024.105034
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
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Version of Record
Category
学術雑誌論文 Journal Article