Creep Failure Characteristics and Mathematical Modeling of High-Density Polyethylene Geomembranes under High Stress Levels
To explore the creep characteristics of geomembrane under different tensile stresses, a series of creep tests were carried out on high-density polyethylene (HDPE) geomembrane specimens. For the interpretation and fitting of the experimental data, refined approximation functions were proposed. Partic...
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Veröffentlicht in: | Polymers 2024-07, Vol.16 (14), p.2019 |
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description | To explore the creep characteristics of geomembrane under different tensile stresses, a series of creep tests were carried out on high-density polyethylene (HDPE) geomembrane specimens. For the interpretation and fitting of the experimental data, refined approximation functions were proposed. Particular attention was paid to the creep failure behavior under high tensile stresses, i.e., 70%, 80%, and 90% of maximum peak stress. To investigate the effects of size on the mechanical response, experiments with two different membrane thicknesses were conducted. The results obtained under high stress levels were compared with creep tests at medium and low stress levels. Depending on load level, different creep characteristics can be distinguished. In the secondary creep state, the creep velocity is higher for higher load levels. In contrast to the medium and low load levels, the geomembrane under high stresses underwent the tertiary creep stage after instantaneous deformation and primary and secondary creep stages. In some tests, it was observed that under very high stress levels, creep velocity does not necessarily follow the expected trend and creep rupture can occur within a short time. For numerical simulation, an improved mathematical model was proposed to reproduce in a unified manner the experimental data of the whole non-linear evolution of creep elongation under different stress levels. |
doi_str_mv | 10.3390/polym16142019 |
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For the interpretation and fitting of the experimental data, refined approximation functions were proposed. Particular attention was paid to the creep failure behavior under high tensile stresses, i.e., 70%, 80%, and 90% of maximum peak stress. To investigate the effects of size on the mechanical response, experiments with two different membrane thicknesses were conducted. The results obtained under high stress levels were compared with creep tests at medium and low stress levels. Depending on load level, different creep characteristics can be distinguished. In the secondary creep state, the creep velocity is higher for higher load levels. In contrast to the medium and low load levels, the geomembrane under high stresses underwent the tertiary creep stage after instantaneous deformation and primary and secondary creep stages. In some tests, it was observed that under very high stress levels, creep velocity does not necessarily follow the expected trend and creep rupture can occur within a short time. For numerical simulation, an improved mathematical model was proposed to reproduce in a unified manner the experimental data of the whole non-linear evolution of creep elongation under different stress levels.</description><identifier>ISSN: 2073-4360</identifier><identifier>EISSN: 2073-4360</identifier><identifier>DOI: 10.3390/polym16142019</identifier><identifier>PMID: 39065338</identifier><language>eng</language><publisher>Switzerland: MDPI AG</publisher><subject>Approximation ; Creep tests ; Deformation effects ; High density polyethylenes ; Mathematical analysis ; Mechanical analysis ; Polyethylene ; Polymers ; Strain hardening ; Stress concentration ; Stresses ; Viscoelasticity</subject><ispartof>Polymers, 2024-07, Vol.16 (14), p.2019</ispartof><rights>2024 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 (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c246t-55fd7abdd7875ee3187727ceefae705cbd9e3df4704ab149c6c60a027200b88a3</cites><orcidid>0000-0003-2049-5947 ; 0009-0009-3843-684X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/39065338$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Wang, Libo</creatorcontrib><creatorcontrib>Cen, Weijun</creatorcontrib><creatorcontrib>Bauer, Erich</creatorcontrib><creatorcontrib>Wei, Jiangliang</creatorcontrib><creatorcontrib>Wen, Zhenyu</creatorcontrib><creatorcontrib>Yan, Jun</creatorcontrib><title>Creep Failure Characteristics and Mathematical Modeling of High-Density Polyethylene Geomembranes under High Stress Levels</title><title>Polymers</title><addtitle>Polymers (Basel)</addtitle><description>To explore the creep characteristics of geomembrane under different tensile stresses, a series of creep tests were carried out on high-density polyethylene (HDPE) geomembrane specimens. 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In some tests, it was observed that under very high stress levels, creep velocity does not necessarily follow the expected trend and creep rupture can occur within a short time. For numerical simulation, an improved mathematical model was proposed to reproduce in a unified manner the experimental data of the whole non-linear evolution of creep elongation under different stress levels.</description><subject>Approximation</subject><subject>Creep tests</subject><subject>Deformation effects</subject><subject>High density polyethylenes</subject><subject>Mathematical analysis</subject><subject>Mechanical analysis</subject><subject>Polyethylene</subject><subject>Polymers</subject><subject>Strain hardening</subject><subject>Stress concentration</subject><subject>Stresses</subject><subject>Viscoelasticity</subject><issn>2073-4360</issn><issn>2073-4360</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpd0c1LwzAYBvAgihtzR68S8OKlmjRp0x5luk3YUFDPJU3ebh3ph0krzL_ezE1Rc0le-OXlgQehc0quGUvJTduYbUVjykNC0yM0DIlgAWcxOf71HqCxcxviD4_imIpTNPB_44ixZIg-JhagxVNZmt4CnqyllaoDW7quVA7LWuOl7NZQST9Lg5eNBlPWK9wUeF6u1sEd1K7stvjJR4FuvTVQA55BU0GVW1mDw32twX5h_NxZcA4v4B2MO0MnhTQOxod7hF6n9y-TebB4nD1MbheBCnncBVFUaCFzrUUiIgBGEyFCoQAKCYJEKtcpMF1wQbjMKU9VrGIiSShCQvIkkWyErvZ7W9u89eC6rCqdAmN8uqZ3GSNJREOSCurp5T-6aXpb-3Q7xdOU8oR7FeyVso1zFoqstWUl7TajJNv1kv3pxfuLw9Y-r0D_6O8W2Cdhr4p5</recordid><startdate>20240715</startdate><enddate>20240715</enddate><creator>Wang, Libo</creator><creator>Cen, Weijun</creator><creator>Bauer, Erich</creator><creator>Wei, Jiangliang</creator><creator>Wen, Zhenyu</creator><creator>Yan, Jun</creator><general>MDPI AG</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0003-2049-5947</orcidid><orcidid>https://orcid.org/0009-0009-3843-684X</orcidid></search><sort><creationdate>20240715</creationdate><title>Creep Failure Characteristics and Mathematical Modeling of High-Density Polyethylene Geomembranes under High Stress Levels</title><author>Wang, Libo ; 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For the interpretation and fitting of the experimental data, refined approximation functions were proposed. Particular attention was paid to the creep failure behavior under high tensile stresses, i.e., 70%, 80%, and 90% of maximum peak stress. To investigate the effects of size on the mechanical response, experiments with two different membrane thicknesses were conducted. The results obtained under high stress levels were compared with creep tests at medium and low stress levels. Depending on load level, different creep characteristics can be distinguished. In the secondary creep state, the creep velocity is higher for higher load levels. In contrast to the medium and low load levels, the geomembrane under high stresses underwent the tertiary creep stage after instantaneous deformation and primary and secondary creep stages. 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subjects | Approximation Creep tests Deformation effects High density polyethylenes Mathematical analysis Mechanical analysis Polyethylene Polymers Strain hardening Stress concentration Stresses Viscoelasticity |
title | Creep Failure Characteristics and Mathematical Modeling of High-Density Polyethylene Geomembranes under High Stress Levels |
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