Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain Rate

The primary goal of this study was to investigate the monotonic tensile behavior of high-density polyethylene (HDPE) in its virgin, regrind, and laminated forms. HDPE is the most commonly used polymer in many industries. A variety of tensile tests were performed using plate-type specimens made of re...

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Main Authors: Mohammad Amjadi, Ali Fatemi
Format: Article
Language:English
Published: MDPI AG 2020-08-01
Series:Polymers
Subjects:
Online Access:https://www.mdpi.com/2073-4360/12/9/1857
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spelling doaj-e78c4430aa88482e9ec8a7490c9c77c12020-11-25T04:03:35ZengMDPI AGPolymers2073-43602020-08-01121857185710.3390/polym12091857Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain RateMohammad Amjadi0Ali Fatemi1Mechanical Engineering, University of Memphis, Memphis, TN 38152, USAMechanical Engineering, University of Memphis, Memphis, TN 38152, USAThe primary goal of this study was to investigate the monotonic tensile behavior of high-density polyethylene (HDPE) in its virgin, regrind, and laminated forms. HDPE is the most commonly used polymer in many industries. A variety of tensile tests were performed using plate-type specimens made of rectangular plaques. Several factors can affect the tensile behavior such as thickness, processing technique, temperature, and strain rate. Testing temperatures were chosen at −40, 23 (room temperature, RT), 53, and 82 °C to investigate temperature effect. Tensile properties, including elastic modulus, yield strength, and ultimate tensile strength, were obtained for all conditions. Tensile properties significantly reduced by increasing temperature while elastic modulus and ultimate tensile strength linearly increased at higher strain rates. A significant effect of thickness on tensile properties was observed for injection molding specimens at 23 °C, but no thickness effect was observed for compression molded specimens at either 23 or 82 °C. The aforementioned effects and discussion of their influence on tensile properties are presented in this paper. Polynomial relations for tensile properties, including elastic modulus, yield strength, and ultimate tensile strength, were developed as functions of temperature and strain rate. Such relations can be used to estimate tensile properties of HDPE as a function of temperature and/or strain rate for application in designing parts with this material.https://www.mdpi.com/2073-4360/12/9/1857tensile behaviorHDPEtemperature effectstrain rate effectprocessing technique effect
collection DOAJ
language English
format Article
sources DOAJ
author Mohammad Amjadi
Ali Fatemi
spellingShingle Mohammad Amjadi
Ali Fatemi
Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain Rate
Polymers
tensile behavior
HDPE
temperature effect
strain rate effect
processing technique effect
author_facet Mohammad Amjadi
Ali Fatemi
author_sort Mohammad Amjadi
title Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain Rate
title_short Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain Rate
title_full Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain Rate
title_fullStr Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain Rate
title_full_unstemmed Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain Rate
title_sort tensile behavior of high-density polyethylene including the effects of processing technique, thickness, temperature, and strain rate
publisher MDPI AG
series Polymers
issn 2073-4360
publishDate 2020-08-01
description The primary goal of this study was to investigate the monotonic tensile behavior of high-density polyethylene (HDPE) in its virgin, regrind, and laminated forms. HDPE is the most commonly used polymer in many industries. A variety of tensile tests were performed using plate-type specimens made of rectangular plaques. Several factors can affect the tensile behavior such as thickness, processing technique, temperature, and strain rate. Testing temperatures were chosen at −40, 23 (room temperature, RT), 53, and 82 °C to investigate temperature effect. Tensile properties, including elastic modulus, yield strength, and ultimate tensile strength, were obtained for all conditions. Tensile properties significantly reduced by increasing temperature while elastic modulus and ultimate tensile strength linearly increased at higher strain rates. A significant effect of thickness on tensile properties was observed for injection molding specimens at 23 °C, but no thickness effect was observed for compression molded specimens at either 23 or 82 °C. The aforementioned effects and discussion of their influence on tensile properties are presented in this paper. Polynomial relations for tensile properties, including elastic modulus, yield strength, and ultimate tensile strength, were developed as functions of temperature and strain rate. Such relations can be used to estimate tensile properties of HDPE as a function of temperature and/or strain rate for application in designing parts with this material.
topic tensile behavior
HDPE
temperature effect
strain rate effect
processing technique effect
url https://www.mdpi.com/2073-4360/12/9/1857
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