Abstract
AbstractThis article presents a continuum damage mechanics approach to characterize fatigue mechanisms of cord‐rubber composites. An airspring bellow which consists of layers of rubber and reinforcing cords is considered for this work. The phenomenological material model for rubber is formulated for the purpose of analyzing the rate dependent behavior under cyclic loading. The rate dependency and hysteretic behavior are characterized by using the concept of internal variables [1]. The implementation of the constitutive formulation for rubber material is done in ABAQUS via UMAT.A fatigue failure mechanisms of cord‐reinforced airspring is for example interfacial debonding. Within the framework of finite element cohesive zone modeling, a user element is developed to study the cord‐rubber interfacial debonding. Furthermore, the developed methodology can be easily extended to understand the long‐term effects of e.g. temperature, frequency, loading rates, amplitudes etc. on the fatigue life of airsprings. (© 2015 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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