MATEC Web Conf.
Volume 300, 2019ICMFF12 - 12th International Conference on Multiaxial Fatigue and Fracture
|Number of page(s)||8|
|Section||LCF or Cyclic Behaviour|
|Published online||02 December 2019|
Configurational forces in cyclic metal plasticity
Materials Mechanics Group, Technische Universität Darmstadt, Franziska-Braun-Str. 3, D-64287 Darmstadt, Germany
The configurational force concept is known to describe adequately the crack driving force in linear fracture mechanics. It seems to represent the crack driving force also for the case of elastic-plastic material properties. The latter has been recognized on the basis of thermodynamical considerations. In metal plasticity, real materials exhibit hardening eﬀects when suﬃciently large loads are applied. Von Mises yield function with isotropic and kinematic hardening is a common assumption in many models. Kinematic and isotropic hardening turn out to be very important whenever cyclic loading histories are applied. This holds equally regardless of whether the induced deformations are homogeneous or non-homogeneous. The aim of the present paper is to discuss the eﬀect of nonlinear isotropic and kinematic hardening on the response of the configurational forces and related parameters in elastic-plastic fracture problems.
© The Authors, published by EDP Sciences, 2019
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