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Creep Characteristic of the Polyethylene(PE) at Various Stresses and Temperatures  

Kang, Suk-Choon (Department of Mechanical Engineering, Univ. of Suwon)
Lee, Young-Won (Department of Mechanical Engineering, Univ. of Suwon)
Publication Information
Journal of the Korean Society for Precision Engineering / v.26, no.7, 2009 , pp. 99-104 More about this Journal
Abstract
Creep characteristic is an important failure mechanism when evaluating engineering materials that are soft as polymers or used as mechanical elements at high temperatures. One of the popular thermo-elastic plastics, Polyethylene(PE) which is used broadly for engineering purposes, as it has good properties and merits compared to other plastics, was studied for creep characteristic at various level of stresses and temperatures. From the experimental results, the creep limit of PE at room temperature is 75% of tensile strength. Also the creep limits decreased exponentially as the temperatures increased, up to 50% of the melting point. Also the secondary stage among the three creep stages was nonexistent nor was there any rupture failure which occurred for many metals.
Keywords
Polyethylene (PE); Creep; Creep Limit; Tensile Strength; Secondary (Steady) Stage Creep; Rupture;
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