Evaluation of Aging Mechanical Properties of Polyethylene Based on Indentation Testing Technology

DAI Xingchen; HUANG Yichang; GUAN Kaishu

doi:10.11973/jxgccl202301016

Materials and Mechanical Engineering > 2023 > 47(1): 106-110. > DOI: 10.11973/jxgccl202301016

DAI Xingchen, HUANG Yichang, GUAN Kaishu. Evaluation of Aging Mechanical Properties of Polyethylene Based on Indentation Testing Technology[J]. Materials and Mechanical Engineering, 2023, 47(1): 106-110. DOI: 10.11973/jxgccl202301016

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Evaluation of Aging Mechanical Properties of Polyethylene Based on Indentation Testing Technology

1. Key Laboratory for Pressure Systems and Safety, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China;
2. Shanghai Special Equipment Supervision and Inspection Institute, Shanghai 200333, China

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Received Date: December 30, 2021
Revised Date: December 10, 2022

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Abstract

Abstract

The thermal oxygen accelerated aging test for different times (0,168,312,408 h) of polyethylene specimen was carried out at 85℃, and the maximum load of polyethylene specimen with different aging times was obtained by indentation testing technology. The linear relationship between yield strength and maximum load was established by finite element numerical simulation, and the yield strength after aging was calculated and compared with the tensile test results. The results show that with the extension of aging time, the yield strength of polyethylene specimens obtained by tensile test gradually increased, and the maximum load obtained by indentation test also gradually increased. The linear correlation coefficient between the maximum load and yield strength of polyethylene specimen indentation test established by finite element method was 0.995, and the relative error between the yield strength of polyethylene specimen with different aging times calculated with the maximum load obtained by indentation test and the tensile test results was less than 1.5%, indicating that the indentation testing technology could accurately obtain the yield strength of polyethylene after aging.
- polyethylene pipe,
- indentation testing technology,
- aging,
- yield strength,
- maximum load

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