|
|||||
|
|
Chemorheological response of elastomers at elevated temperatures: Experiments and simulations |
|
| Authors: | John A Shaw Alan S Jones |
| Institution: | a Department of Aerospace Engineering,The University of Michigan, 1320 Beal Ave, Ann Arbor, MI 48109-2140, USA b Department of Theoretical and Applied Mechanics,The University of Illinois at Urbana-Champaign, IL, USA c Department of Mechanical Engineering,The University of Michigan, MI, USA |
| Abstract: | An experimental study and a method for simulating the constitutive response of elastomers at temperatures in the chemorheological range (90-150 °C for natural rubber) are presented. A comprehensive set of uniaxial experiments for a variety of prescribed temperature histories is performed on natural rubber specimens that exhibit finite elasticity, entropic stiffening with temperature, viscoelasticity, scission, and oxygen diffusion/reaction effects. The simulation approach is based on a multi-network framework for finite elasticity, isothermal incompressibility, thermal expansion, and temperature-induced degradation. The model extends previous work to account for kinetics of scission for arbitrary time-varying temperature histories and incorporates the effects of viscoelastic relaxation and diffusion-limited oxidative scission. The model is calibrated to experiments performed on a commercially-available filled natural rubber material, and numerical simulations are compared favorably to experiments for a variety of temperature histories. |
| Keywords: | Chemorheological degradation Elastomer Natural rubber Scission Elevated temperature |
| 本文献已被 ScienceDirect 等数据库收录！ | |