Modelling of Cyclic Plasticity and Crack Propagation

Abstract

An experimental and numerical study of the cyclic deformation and low-cycle fatigue behaviour of the aluminium alloy AlCu5BiPb–T8 is presented. The experimental program included monotonic tensile tests, symmetric and unsymmetric strain-controlled fatigue tests, fracture toughness tests, as well as fatigue crack initiation and propagation tests. Within the framework of numerical investigations an efficient algorithm for modelling of cyclic plasticity is proposed. This algorithm is implemented into the finite element program ABAQUS and applied to the analysis of a crack growth near the notch. The accuracy of the computational procedure is tested by comparing the computed results with the real experimental data.

Experimental and Numerical Investigation of Fatigue Behaviour of Nodular Cast Iron

“…In this section, a short description of test procedure is given, and some selected test results are presented. The present paper forms the continuation of work already reported in [6]. Mechanical properties of the nodular cast iron (Type 200) are 0.2% proof stress of 256.5 MPa, the tensile strength of 417.2 MPa, the modulus of 182.4 GPa and the elongation of 23.5%, respectively.…”