The Effects of Loading History and Manufacturing Methods on the Mechanical Behavior of High-Density Polyethylene

Düşünceli, Necmi; Aydemir, Bülent

doi:10.1177/0095244311404181

Cited by 12 publications

(14 citation statements)

References 11 publications

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“…As a result of characterizing the mechanical properties immediately after introducing the loading history, the creep and relaxation behaviour was found to be complicated by the rate-reversal phenomenon, that is, increase and then decrease of stress in the relaxation test and decrease and then increase of strain in the creep test. Such an approach of one test with multiple phases was also used to investigate the effects of loading history and manufacturing techniques on the mechanical behaviour of HDPE [14], from which it was confirmed that the uniaxial tensile behaviour of HDPE shows clear dependence on the manufacturing technique.…”

Section: A N U S C R I P Tmentioning

confidence: 91%

Quantitative assessment of deformation-induced damage in polyethylene pressure pipe

Zhang

Jar

2015

Polymer Testing

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This paper presents results from a study that quantifies the influence of excessive deformation on the damage development in polyethylene (PE) pressure pipe. The experimental investigation is through the application of a novel two-stage approach to the D-split test of notched pipe ring (NPR) specimens. The first test is to introduce damage by subjecting the specimens to different levels of tensile strain at crosshead speeds of 0.01, 1, 10 or 100mm/min. The second test is to apply monotonic tensile loading at a crosshead speed of 0.01mm/min to characterize the mechanical properties for specimens that have had damage generated in the first test.Experimental results suggest that elastic modulus and yield stress decrease and yield strain increases with increase of the strain introduced in the first test. Variation of experimentally measured elastic modulus is used to establish influence of crosshead speed on the damage evolution in the PE pressure pipe.

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Section: A N U S C R I P Tmentioning

confidence: 91%

Quantitative assessment of deformation-induced damage in polyethylene pressure pipe

Zhang

Jar

2015

Polymer Testing

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“…The most common processing techniques to manufacture HDPE are extrusion, injection molding, blow molding, and compression molding. Manufacturing techniques may influence the mechanical response of HDPE, such as elastic modulus and tensile strength, which could be due to different molecular morphologies and structures in the final product [ 16 ]. It has been shown that the optimization of manufacturing parameters in injection molding results in substantially improved tensile properties [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

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

Amjadi¹,

Fatemi²

2020

Polymers

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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.

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“…The third and fourth sets of panels were produced by adding 40 w/% and 50 w/% PE, respectively. 28,29 First, all the panels were prepared of minced composite cardboard and the determined PE amounts; then, the mixtures were placed into a cold mold. After exposure to pressure in the cold mold, the mold was heated to the melting point of PE and the mixture was kept in it for over an hour.…”

Section: Preparation Of Ccpsmentioning

confidence: 99%

Mechanical properties of polymer-matrix cellulose-based composite materials

Düşünceli¹,

Surme²

2020

Mater. Tehnol.

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This study focuses on composite cardboard panels, determining their mechanical properties. The panels were manufactured of a minced waste-paper-based composite material. First, four types of mixture were prepared using minced-material composite cardboards with different ratios of polyethylene (PE). Second, the mixtures were compressed and heated in a mold, and then a composite cardboard panel (CCP), 7-mm thick, was produced. In the third stage, tensile, three-point-bending, nail-pulling and water-absorption tests were applied to specimens of different CCPs. Mechanical tests were conducted using a tensile testing machine in accordance with ASTM 1037. In this study, the mechanical behaviors of the CCPs associated with the added PE were investigated. Observations showed that the presence of PE enhanced the mechanical strength of the CCPs and resulted in an increase in the nail-pulling-load and water-absorption resistance. The investigation was extended to conventional wooden panels (oriented strand board and fiberboard), which were exposed to the same tests. The experimental data demonstrated that the strength of the new product was higher than that of the conventional wooden panels. The results suggest that CCPs can be used as an alternative to wooden panels.V{tudiji so se avtorji osredoto~ili na kompozitne kartonske panele (plo{~e) in dolo~itev njihovih mehanskih lastnosti. Paneli so bili izdelani iz sesekljanega oz. narezanega kompozitnega materiala na osnovi odpadnega papirja. Najprej so izdelali {tiri vrste me{anic iz sesekljanega kartona in razli~no koli~ino polietilena (PE). Me{anice so nato stisnili, segreli in oblikovali v 7 mm debele kompozitne kartonske plo{~e (CCP). Iz izdelanih kompozitnih kartonskih plo{~so izrezali preizku{ance za trito~kovni upogibni preizkus, trgalni preizkus in preizkus absorpcije vode. Mehanske preizkuse so izvedli na univerzalnem trgalnem stroju v skladu s standardom ASTM 1037. Analize preizkusov so pokazale, da dodatek polietilena izbolj{a mehansko trdnost izdelanih kompozitov in pove~a njihovo odpornost proti absorpciji vode. Raziskavo so avtorji dodatno raz{irili {e na testiranje lesenih kompozitnih panelov (iz sekancev in vlaken). Nove kompozitne kartonske plo{~e imajo v primerjavi s konvencionalnimi lesenimi plo{~ami ve~jo trdnost, zato bi se lahko uporabljale kot njihova alternativa. Klju~ne besede: kompozitni materiali, mehanske lastnosti, polimer, obdelava odpadkov, recikliranje

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The Effects of Loading History and Manufacturing Methods on the Mechanical Behavior of High-Density Polyethylene

Cited by 12 publications

References 11 publications

Quantitative assessment of deformation-induced damage in polyethylene pressure pipe

Quantitative assessment of deformation-induced damage in polyethylene pressure pipe

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

Mechanical properties of polymer-matrix cellulose-based composite materials

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