Friedlein J, Mergheim J, Steinmann P (2023)
Publication Type: Journal article
Publication year: 2023
Book Volume: 99
Article Number: 104946
DOI: 10.1016/j.euromechsol.2023.104946
We contrast different gradient-enhancements for plasticity-damage material models in the logarithmic strain space and compare them to reference models based on multiplicative plasticity. The models being compared include plasticity - gradient-damage, where the gradient-enhancement is applied on the local damage variable, and gradient-plasticity - damage with a gradient-enhanced plastic hardening variable. Thereby, gradient-plasticity proved to be able to simultaneously regularise plastic and ductile (plasticity-driven) damage localisation as confirmed by numerical localisation analyses. This appears to be especially advantageous for logarithmic strain space plasticity-damage, because of the observed plastic localisation even for the case of plasticity with hardening. Even though gradient-plasticity appears to be numerically more demanding, two numerical examples indicate a good robustness and mesh objectivity in the softening regime. Moreover, the internal length for plasticity is able to adjust the damage zone width, similarly to gradient-damage, however ensuring a priori that damage takes place exclusively inside the plastic zone.
APA:
Friedlein, J., Mergheim, J., & Steinmann, P. (2023). Efficient gradient enhancements for plasticity with ductile damage in the logarithmic strain space. European Journal of Mechanics A-Solids, 99. https://dx.doi.org/10.1016/j.euromechsol.2023.104946
MLA:
Friedlein, Johannes, Julia Mergheim, and Paul Steinmann. "Efficient gradient enhancements for plasticity with ductile damage in the logarithmic strain space." European Journal of Mechanics A-Solids 99 (2023).
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