Abstract
In this article, the damage analysis of a thin walled rod has been investigated by employing the continuum damage mechanics (CDM). The rod is under cyclic tension and compression loadings and the elstoplastic damage analysis has been carried out by using the developed finite element code. Moreover, unilateral effect of damage has been investigated and the obtained results are compared to the experimental data, available in the literature. The results are obtained for two kinds of damage deactivation regimes, discontinuous and continuous damage deactivation with different damage deactivation paths. The obtained results show that, using continuous damage deactivation concept yields to more aligned results with experimental data, both qualitatively and quantitatively. Moreover, it is shown that using second order function of stress as a damage deactivation path leads to better numerical convergence in solution algorithm and also it makes more accurate prediction of material behavior under cyclic loading.
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