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Investigation on Indentation Cracking-Based Approaches for Residual Stress Evaluation
Vickers indentation fracture can be used to estimate equibiaxial residual stresses (RS) in brittle materials. Previous, conceptually-equal, analytical models were established on the assumptions that (i) the crack be of a semi-circular shape and (ii) that the shape not be affected by RS. A generalize...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5506943/ https://www.ncbi.nlm.nih.gov/pubmed/28772765 http://dx.doi.org/10.3390/ma10040404 |
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author | Rickhey, Felix Marimuthu, Karuppasamy Pandian Lee, Hyungyil |
author_facet | Rickhey, Felix Marimuthu, Karuppasamy Pandian Lee, Hyungyil |
author_sort | Rickhey, Felix |
collection | PubMed |
description | Vickers indentation fracture can be used to estimate equibiaxial residual stresses (RS) in brittle materials. Previous, conceptually-equal, analytical models were established on the assumptions that (i) the crack be of a semi-circular shape and (ii) that the shape not be affected by RS. A generalized analytical model that accounts for the crack shape and its change is presented. To assess these analytical models and to gain detailed insight into the crack evolution, an extended finite element (XFE) model is established. XFE analysis results show that the crack shape is generally not semi-circular and affected by RS and that tensile and compressive RS have different effects on the crack evolution. Parameter studies are performed to calibrate the generalized analytical model. Comparison of the results calculated by the analytical models with XFE results reveals the inaccuracy inherent in the previous analytical models, namely the neglect of (the change of) the crack aspect-ratio, in particular for tensile RS. Previous models should therefore be treated with caution and, if at all, used only for compressive RS. The generalized model, on the other hand, gives a more accurate description of the RS, but requires the crack depth. |
format | Online Article Text |
id | pubmed-5506943 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-55069432017-07-28 Investigation on Indentation Cracking-Based Approaches for Residual Stress Evaluation Rickhey, Felix Marimuthu, Karuppasamy Pandian Lee, Hyungyil Materials (Basel) Article Vickers indentation fracture can be used to estimate equibiaxial residual stresses (RS) in brittle materials. Previous, conceptually-equal, analytical models were established on the assumptions that (i) the crack be of a semi-circular shape and (ii) that the shape not be affected by RS. A generalized analytical model that accounts for the crack shape and its change is presented. To assess these analytical models and to gain detailed insight into the crack evolution, an extended finite element (XFE) model is established. XFE analysis results show that the crack shape is generally not semi-circular and affected by RS and that tensile and compressive RS have different effects on the crack evolution. Parameter studies are performed to calibrate the generalized analytical model. Comparison of the results calculated by the analytical models with XFE results reveals the inaccuracy inherent in the previous analytical models, namely the neglect of (the change of) the crack aspect-ratio, in particular for tensile RS. Previous models should therefore be treated with caution and, if at all, used only for compressive RS. The generalized model, on the other hand, gives a more accurate description of the RS, but requires the crack depth. MDPI 2017-04-12 /pmc/articles/PMC5506943/ /pubmed/28772765 http://dx.doi.org/10.3390/ma10040404 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Rickhey, Felix Marimuthu, Karuppasamy Pandian Lee, Hyungyil Investigation on Indentation Cracking-Based Approaches for Residual Stress Evaluation |
title | Investigation on Indentation Cracking-Based Approaches for Residual Stress Evaluation |
title_full | Investigation on Indentation Cracking-Based Approaches for Residual Stress Evaluation |
title_fullStr | Investigation on Indentation Cracking-Based Approaches for Residual Stress Evaluation |
title_full_unstemmed | Investigation on Indentation Cracking-Based Approaches for Residual Stress Evaluation |
title_short | Investigation on Indentation Cracking-Based Approaches for Residual Stress Evaluation |
title_sort | investigation on indentation cracking-based approaches for residual stress evaluation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5506943/ https://www.ncbi.nlm.nih.gov/pubmed/28772765 http://dx.doi.org/10.3390/ma10040404 |
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