PSI - Issue 42

Karlo Seleš et al. / Procedia Structural Integrity 42 (2022) 1721–1727 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

1726

6

a)

b)

Fig. 4. Numerical 2D model of compact tension (CT) specimen with corresponding FE mesh, b) final crack obtained by PF method

The final representation of the crack is shown in Fig. 4b. The comparison of the numerical modeling for the two models, AT2 and TH, and experimental data is shown in Fig. 5.

Fig. 5. Comparison of numerical PF modeling and experimental data of PMMA CT specimen

4. Discussion From the results, it is visible that presented implementation of the phase-field method can describe, qualitatively and quantitatively, brittle fracture behavior of the PMMA compact tension samples. Since these are preliminary results, a number of experimental data should be made to overcome the possible difference and defects in individual samples. Using different models, like presented TH model, it is possible to save computational time since coarser mesh is required. Even though preliminary results show great potential, additional experimental and numerical investigation has to be carried out. Influence of boundary conditions, mesh sensitivity and 3D case is planned for near future work in order to accurately model the complex 2D and 3D heterogeneous materials.