2D AXISYMMETRIC VS. 3D SOLID ELEMENT PHASE-FIELD DAMAGE MODELING

Phase-field damage modeling (PFDM) is very popular among researchers and engineers, because it offers applications to various fields of interest. Investigating damage in structures and predicting its evolution, which can lead to material stiffness degradation and structural failure, is the most interesting aspect. Various research groups at the top world universities have implemented the latest findings into the commercial and research finite element method (FEM) codes, and the PFDM will probably be recognized technique for structural safety monitoring. However, the practical application is in one of the top interests, but some disadvantages decrease the possibility of efficient and accurate FEM simulations. One of them is the need for a fine FE mesh in the zone where material damage is expected, which makes models with large numbers of degrees of freedom and huge computational time. In this scope, it is important to implement the PFDM for various types of finite elements such as 2D axisymmetric elements, which can decrease the size of the problem by modeling only a cross-section of the axisymmetric structure. In this paper, we have implemented a previously developed PFDM theory into the 2D axisymmetric element and compared the simulation results to the 3D solid element for the well-known large strain circular bar example.