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Fracture Assessment of PEEK under Static Loading by Means of the Local Strain Energy Density
Polyetheretherketone (PEEK) has gained interest in many industrial applications due to its high strength-to-weight ratio, excellent heat tolerance and high corrosion resistance. Stress concentrators such as notches and geometrical discontinuities are present in many such components necessitating the...
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/PMC5744358/ https://www.ncbi.nlm.nih.gov/pubmed/29236029 http://dx.doi.org/10.3390/ma10121423 |
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author | Peron, Mirco Razavi, Seyed Mohammad Javad Torgersen, Jan Berto, Filippo |
author_facet | Peron, Mirco Razavi, Seyed Mohammad Javad Torgersen, Jan Berto, Filippo |
author_sort | Peron, Mirco |
collection | PubMed |
description | Polyetheretherketone (PEEK) has gained interest in many industrial applications due to its high strength-to-weight ratio, excellent heat tolerance and high corrosion resistance. Stress concentrators such as notches and geometrical discontinuities are present in many such components necessitating the reliable assessment of notch sensitivity of PEEK in monotonic tension. Here we evaluate the applicability of the strain energy density (SED) approach for the assessment of the fracture strength of experimentally tested notched geometries subject to corrosion. The fracture behavior of neat, circumferentially razor-grooved dog-bone specimens and circumferentially U-notched specimens with different notch radii can be predicted with a discrepancy lower than ±10%. Reliable predictions are shown on two previously published datasets employing both computed and published mechanical properties as inputs for the SED calculations. This report presents the first successful application of SED for PEEK as well as the successful prediction of tensile behavior in corrosive environments. This opens the road towards future applications of PEEK in fields its compliant use is of growing popularity. |
format | Online Article Text |
id | pubmed-5744358 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-57443582017-12-31 Fracture Assessment of PEEK under Static Loading by Means of the Local Strain Energy Density Peron, Mirco Razavi, Seyed Mohammad Javad Torgersen, Jan Berto, Filippo Materials (Basel) Article Polyetheretherketone (PEEK) has gained interest in many industrial applications due to its high strength-to-weight ratio, excellent heat tolerance and high corrosion resistance. Stress concentrators such as notches and geometrical discontinuities are present in many such components necessitating the reliable assessment of notch sensitivity of PEEK in monotonic tension. Here we evaluate the applicability of the strain energy density (SED) approach for the assessment of the fracture strength of experimentally tested notched geometries subject to corrosion. The fracture behavior of neat, circumferentially razor-grooved dog-bone specimens and circumferentially U-notched specimens with different notch radii can be predicted with a discrepancy lower than ±10%. Reliable predictions are shown on two previously published datasets employing both computed and published mechanical properties as inputs for the SED calculations. This report presents the first successful application of SED for PEEK as well as the successful prediction of tensile behavior in corrosive environments. This opens the road towards future applications of PEEK in fields its compliant use is of growing popularity. MDPI 2017-12-13 /pmc/articles/PMC5744358/ /pubmed/29236029 http://dx.doi.org/10.3390/ma10121423 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 Peron, Mirco Razavi, Seyed Mohammad Javad Torgersen, Jan Berto, Filippo Fracture Assessment of PEEK under Static Loading by Means of the Local Strain Energy Density |
title | Fracture Assessment of PEEK under Static Loading by Means of the Local Strain Energy Density |
title_full | Fracture Assessment of PEEK under Static Loading by Means of the Local Strain Energy Density |
title_fullStr | Fracture Assessment of PEEK under Static Loading by Means of the Local Strain Energy Density |
title_full_unstemmed | Fracture Assessment of PEEK under Static Loading by Means of the Local Strain Energy Density |
title_short | Fracture Assessment of PEEK under Static Loading by Means of the Local Strain Energy Density |
title_sort | fracture assessment of peek under static loading by means of the local strain energy density |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5744358/ https://www.ncbi.nlm.nih.gov/pubmed/29236029 http://dx.doi.org/10.3390/ma10121423 |
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