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Analysis of the Dynamic Cushioning Property of Expanded Polyethylene Based on the Stress–Energy Method

This paper aimed to experimentally clarify the dynamic crushing performance of expanded polyethylene (EPE) and analyze the influence of thickness and dropping height on its mechanical behavior based on the stress–energy method. Hence, a series of impact tests are carried out on EPE foams with differ...

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Autores principales: Xing, Yueqing, Sun, Deqiang, Chen, Guoliang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10489951/
https://www.ncbi.nlm.nih.gov/pubmed/37688229
http://dx.doi.org/10.3390/polym15173603
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author Xing, Yueqing
Sun, Deqiang
Chen, Guoliang
author_facet Xing, Yueqing
Sun, Deqiang
Chen, Guoliang
author_sort Xing, Yueqing
collection PubMed
description This paper aimed to experimentally clarify the dynamic crushing performance of expanded polyethylene (EPE) and analyze the influence of thickness and dropping height on its mechanical behavior based on the stress–energy method. Hence, a series of impact tests are carried out on EPE foams with different thicknesses and dropping heights. The maximum acceleration, static stress, dynamic stress and dynamic energy of EPE specimens are obtained through a dynamic impact test. Then, according to the principle of the stress–energy method, the functional relationship between dynamic stress and dynamic energy is obtained through exponential fitting and polynomial fitting, and the cushion material constants a, b and c are determined. The maximum acceleration-static stress curves of any thickness and dropping height can be further fitted. By the equipartition energy domain method, the range of static stress can be expanded, which is very fast and convenient. When analyzing the influence of thickness and dropping height on the dynamic cushioning performance curves of EPE, it is found that at the same drop height, with the increase of thickness, the opening of the curve gradually becomes larger. The minimum point on the maximum acceleration-static stress curve also decreases with the increase of the thickness. When the dropping height is 400 mm, compared to foam with a thickness of 60 mm, the tested maximum acceleration value of the lowest point of the specimen with a thickness of 40 mm increased by 45.3%, and the static stress is both 5.5 kPa. When the thickness of the specimen is 50 mm, compared to the dropping height of 300 mm, the tested maximum acceleration value of the lowest point of the specimen with a dropping height of 600 mm increased by 93.3%. Therefore, the dynamic cushioning performance curve of EPE foams can be quickly obtained by the stress–energy method when the precision requirement is not high, which provides a theoretical basis for the design of cushion packaging.
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spelling pubmed-104899512023-09-09 Analysis of the Dynamic Cushioning Property of Expanded Polyethylene Based on the Stress–Energy Method Xing, Yueqing Sun, Deqiang Chen, Guoliang Polymers (Basel) Article This paper aimed to experimentally clarify the dynamic crushing performance of expanded polyethylene (EPE) and analyze the influence of thickness and dropping height on its mechanical behavior based on the stress–energy method. Hence, a series of impact tests are carried out on EPE foams with different thicknesses and dropping heights. The maximum acceleration, static stress, dynamic stress and dynamic energy of EPE specimens are obtained through a dynamic impact test. Then, according to the principle of the stress–energy method, the functional relationship between dynamic stress and dynamic energy is obtained through exponential fitting and polynomial fitting, and the cushion material constants a, b and c are determined. The maximum acceleration-static stress curves of any thickness and dropping height can be further fitted. By the equipartition energy domain method, the range of static stress can be expanded, which is very fast and convenient. When analyzing the influence of thickness and dropping height on the dynamic cushioning performance curves of EPE, it is found that at the same drop height, with the increase of thickness, the opening of the curve gradually becomes larger. The minimum point on the maximum acceleration-static stress curve also decreases with the increase of the thickness. When the dropping height is 400 mm, compared to foam with a thickness of 60 mm, the tested maximum acceleration value of the lowest point of the specimen with a thickness of 40 mm increased by 45.3%, and the static stress is both 5.5 kPa. When the thickness of the specimen is 50 mm, compared to the dropping height of 300 mm, the tested maximum acceleration value of the lowest point of the specimen with a dropping height of 600 mm increased by 93.3%. Therefore, the dynamic cushioning performance curve of EPE foams can be quickly obtained by the stress–energy method when the precision requirement is not high, which provides a theoretical basis for the design of cushion packaging. MDPI 2023-08-30 /pmc/articles/PMC10489951/ /pubmed/37688229 http://dx.doi.org/10.3390/polym15173603 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/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/).
spellingShingle Article
Xing, Yueqing
Sun, Deqiang
Chen, Guoliang
Analysis of the Dynamic Cushioning Property of Expanded Polyethylene Based on the Stress–Energy Method
title Analysis of the Dynamic Cushioning Property of Expanded Polyethylene Based on the Stress–Energy Method
title_full Analysis of the Dynamic Cushioning Property of Expanded Polyethylene Based on the Stress–Energy Method
title_fullStr Analysis of the Dynamic Cushioning Property of Expanded Polyethylene Based on the Stress–Energy Method
title_full_unstemmed Analysis of the Dynamic Cushioning Property of Expanded Polyethylene Based on the Stress–Energy Method
title_short Analysis of the Dynamic Cushioning Property of Expanded Polyethylene Based on the Stress–Energy Method
title_sort analysis of the dynamic cushioning property of expanded polyethylene based on the stress–energy method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10489951/
https://www.ncbi.nlm.nih.gov/pubmed/37688229
http://dx.doi.org/10.3390/polym15173603
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