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Polymers 2018, 10(2), 156; https://doi.org/10.3390/polym10020156

Compression Creep and Thermal Ratcheting Behavior of High Density Polyethylene (HDPE)

Department of Mechanical engineering, École de Technologie Supérieure, 1100 Notre Dame O, Montréal, QC H3C1K3, Canada
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Received: 25 December 2017 / Revised: 31 January 2018 / Accepted: 2 February 2018 / Published: 7 February 2018
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Abstract

The characterization of thermal ratcheting behavior of high density polyethylene (HDPE) material coupled with compressive creep is presented. The research explores the adverse influence of thermal cycling on HDPE material properties under the effect of compressive load, number of thermal cycles, creep time period, and thermal ratcheting temperature range. The compressive creep analysis of HDPE shows that the magnitude of creep strain increases with increase in magnitude of applied load and temperature, respectively. The creep strain value increased by 7 and 28 times between least and maximum applied temperature and load conditions, respectively. The creep modulus decreases with increase in compressive load and temperature conditions. The cumulative deformation is evident in the HDPE material, causing a reduction in the thickness of the sample under thermal ratcheting. The loss of thickness increases with increase in the number of thermal cycles, while showing no sign of saturation. The thermal ratcheting strain (TRS) is influenced dominantly by the applied load condition. In addition, the TRS decreases with increase in creep time period, which is cited to the extended damage induced due creep. The results highlight the need for improved design standard with inclusion of thermal ratcheting phenomenon for HDPE structures particularly HDPE bolted flange joint. View Full-Text
Keywords: compressive creep; thermal ratcheting; HDPE characterization; creep modulus; thermal ratcheting strain; bolted flange joints compressive creep; thermal ratcheting; HDPE characterization; creep modulus; thermal ratcheting strain; bolted flange joints
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Kanthabhabha Jeya, R.P.; Bouzid, A.-H. Compression Creep and Thermal Ratcheting Behavior of High Density Polyethylene (HDPE). Polymers 2018, 10, 156.

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