Methodology of Evaluating Stress Relaxation Phenomenon for ElastomericParts by Time-Temperature Superposition and Finite Element Method

In the production of elastomers for industrial application, there is always the question of how longthese products will last in an intended application? Elastomers are viscoelastic, in fact timedependency and energy dissipation of their mechanical properties is the major feature of these parts.In this research, the methodology of evaluating tensile stress relaxation with experimental (TTS) andcomputational (FEA) approaches has been introduced for EPDM O-rings which relaxationphenomenon is the main reason of failure of these components. The comparison of laboratory stressrelaxation by accelerated ageing test with nonlinear finite element analysis prediction for EPDMconfirmed the accuracy, reliability and cost-effectiveness of computational methods instead ofimplementing time-consuming laboratory stress relaxation experiments

کلیدواژه ها:

Simulation and Modeling of Elastomers ، Stress Relaxation ، Time-TemperatureSuperposition (TTS) ، Finite Element Analysis (FEA) ، EPDM Compound