Calculation method for brittle fracture of functional gradient materials

Cong Qi; Ai Guo Pi

doi:10.1038/s41598-024-80884-3

Calculation method for brittle fracture of functional gradient materials

Cong Qi^*, Ai Guo Pi^*

^*Corresponding author for this work

School of Mechatronical Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Combined the phase field model with the wavelet dummy node-virtual crack closure technique (WDN-VCCT) used for stress intensity factors (SIFs) calculation. Calculated the node displacement using an improved brittle fracture phase field method, established the relationship between node displacement and node force using WDN-VCCT, and calculated the SIFs at the crack tip. The correctness and accuracy of the proposed method were verified through functional gradient material (FGM) tensile experiment. The influence of crack inclination angle, crack position and gradient index on mechanical response, and SIFs values at the crack tip was discussed. This study provides important computational tools for estimating the service life of FGMs and important references for structural optimization design methods.

Original language	English
Article number	29262
Journal	Scientific Reports
Volume	14
Issue number	1
DOIs	https://doi.org/10.1038/s41598-024-80884-3
Publication status	Published - Dec 2024

Keywords

Brittle fracture
Crack
Functional gradient materials
Phase field
Stress intensity factor

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10.1038/s41598-024-80884-3

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title = "Calculation method for brittle fracture of functional gradient materials",

abstract = "Combined the phase field model with the wavelet dummy node-virtual crack closure technique (WDN-VCCT) used for stress intensity factors (SIFs) calculation. Calculated the node displacement using an improved brittle fracture phase field method, established the relationship between node displacement and node force using WDN-VCCT, and calculated the SIFs at the crack tip. The correctness and accuracy of the proposed method were verified through functional gradient material (FGM) tensile experiment. The influence of crack inclination angle, crack position and gradient index on mechanical response, and SIFs values at the crack tip was discussed. This study provides important computational tools for estimating the service life of FGMs and important references for structural optimization design methods.",

keywords = "Brittle fracture, Crack, Functional gradient materials, Phase field, Stress intensity factor",

author = "Cong Qi and Pi, {Ai Guo}",

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doi = "10.1038/s41598-024-80884-3",

language = "English",

volume = "14",

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T1 - Calculation method for brittle fracture of functional gradient materials

AU - Qi, Cong

AU - Pi, Ai Guo

N1 - Publisher Copyright: © The Author(s) 2024.

PY - 2024/12

Y1 - 2024/12

N2 - Combined the phase field model with the wavelet dummy node-virtual crack closure technique (WDN-VCCT) used for stress intensity factors (SIFs) calculation. Calculated the node displacement using an improved brittle fracture phase field method, established the relationship between node displacement and node force using WDN-VCCT, and calculated the SIFs at the crack tip. The correctness and accuracy of the proposed method were verified through functional gradient material (FGM) tensile experiment. The influence of crack inclination angle, crack position and gradient index on mechanical response, and SIFs values at the crack tip was discussed. This study provides important computational tools for estimating the service life of FGMs and important references for structural optimization design methods.

AB - Combined the phase field model with the wavelet dummy node-virtual crack closure technique (WDN-VCCT) used for stress intensity factors (SIFs) calculation. Calculated the node displacement using an improved brittle fracture phase field method, established the relationship between node displacement and node force using WDN-VCCT, and calculated the SIFs at the crack tip. The correctness and accuracy of the proposed method were verified through functional gradient material (FGM) tensile experiment. The influence of crack inclination angle, crack position and gradient index on mechanical response, and SIFs values at the crack tip was discussed. This study provides important computational tools for estimating the service life of FGMs and important references for structural optimization design methods.

KW - Brittle fracture

KW - Crack

KW - Functional gradient materials

KW - Phase field

KW - Stress intensity factor

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DO - 10.1038/s41598-024-80884-3

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SN - 2045-2322

VL - 14

JO - Scientific Reports

JF - Scientific Reports

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ER -

Calculation method for brittle fracture of functional gradient materials

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Keywords

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