Cyclic Behavior of High Density Polyethylene (HDPE)

Düşünceli, Necmi; Aydemir, Bülent; Terzi, Niyazi U.

doi:10.1063/1.3455664

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Researchers [8,9] studied the impact of strain rate and temperature on tensile properties of the post-consumer recycled HPDE. A large quantity of research focused on the mechanical cycling or fatigue behavior of HDPE material [10], HDPE geogrid [11], solid extruded HDPE [12], HDPE composite [13], HDPE pipe joints [14], but almost none on the thermal ratcheting effect. The mechanical property of filled HDPE and the effect of loading and manufacturing method on the properties of HPDE are well documented in the studies [15,16], respectively.…”

Section: Introductionmentioning

confidence: 99%

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

Jeya

Bouzid

2018

Polymers

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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.

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Section: Introductionmentioning

confidence: 99%

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

Jeya

Bouzid

2018

Polymers

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Influence of Thermal Ratcheting on the Creep and Mechanical Properties of High-Density Polyethylene

Jeya

Bouzid

2019

Journal of Engineering Materials and Technology

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The objective of this research is to describe the consequence of thermal ratcheting on the long-term creep property of the high-density polyethylene (HDPE) material. The thermal ratcheting phenomenon increases significantly the creep strain of HDPE. The magnitude of the creep strain of HDPE increases by 8% after just 20 thermal cycles between 28 and 50 °C. The creep modulus, which is inversely proportional to the creep strain, depletes further under thermal ratcheting. Both the properties change significantly with the number of thermal cycles. The coefficient of thermal expansion (CTE) of HDPE varies with the applied compressive load, with successive thermal cycles, and with the thermal ratcheting temperature. The impact of thermal ratcheting diminishes with an increase in initial steady creep exposure time period, but still the magnitude cumulative deformation induced is noteworthy. The magnitude of growth in creep strain drops from 8% to 2.4% when thermal ratcheting is performed after 1 and 45 days of steady creep, respectively. There is a notable change in the thickness of the material with each heating and cooling cycle even after 45 days of creep; however, the thermal ratcheting strain value drops by 80% in comparison with the thermal ratcheting strain after 1 day of creep and under similar test conditions.

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Cyclic Behavior of High Density Polyethylene (HDPE)

Cited by 2 publications

References 5 publications

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

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

Influence of Thermal Ratcheting on the Creep and Mechanical Properties of High-Density Polyethylene

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