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Spherical indentation of EPDM and silicone rubber materials under high- and low-temperature conditions

Teng-Fei Zhang, Jie Su, Yuan-Jie Shu and Liao-Liang Ke

Vol. 18 (2023), No. 5, 655–674
Abstract

In this work, the influence of high and low temperatures on the spherical indentation behavior of EPDM (ethylene propylene diene monomer) and silicone rubber materials is systematically investigated by experiments and numerical simulations. The temperature range is considered from 40 C to 220 C. Indentation performances at high and low temperatures are measured by using the electronic universal testing machine with the temperature test chamber. The hyperelastic and viscoelastic constitutive models of rubber materials are considered in the finite element simulation. The corresponding constitutive parameters are determined by a uniaxial compression test and a dynamic mechanical analysis test. The influences of temperature, loading rate, and holding time on indentation behavior are discussed. And the contact pressure distribution is analyzed under high- and low-temperature conditions. The results indicate that the silicone rubber has a more stable indentation performance than that of the EPDM rubber at both high and low temperatures. EPDM rubber is more prone to indentation failure due to stress concentration in low-temperature environments.

Keywords
rubber, spherical indentation, high and low temperatures, visco-hyperelasticity
Milestones
Received: 23 December 2022
Revised: 30 June 2023
Accepted: 9 July 2023
Published: 25 October 2023
Authors
Teng-Fei Zhang
School of Mechanical Engineering
Tianjin University
China
Jie Su
School of Mechanical Engineering
Tianjin University
China
Yuan-Jie Shu
Institute of Engineering Mechanics
Beijing Jiaotong University
China
Liao-Liang Ke
School of Mechanical Engineering
Tianjin University
China