PSI - Issue 68

Q.M. Vuong et al. / Procedia Structural Integrity 68 (2025) 887–893

891

Q.M. Vuong et al. / Structural Integrity Procedia 00 (2024) 000–000

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(a) AT1 model

(b) PF-CZM model.

(c) Maximal principle stress equivalent with number ing from left to right

Fig. 3: Comparison using AT1 and PF-CZM models

(a) Experimental re sults Vicentini et al. (2024)

(b) Detail of the crack Path

(c) Results for the Miehe’s decomposition

(d) Results for the Wu’s de composition

Fig. 4: Comparison between the experimental results and the numerical one using both Miehe and Wu’s decompositions.

It can be observed a global agreement of the numerical results when compared to the experimental crack paths. Miehe’s decomposition shows a spreading crack pattern, unlike Wu’s. A bit of large zone at the tip explained by the influence of coarser mesh near the border of specimen. Again, the dependence of mesh and material’s properties is crucial point of phase field approach.

Conclusion

In this study, an experimental setup to investigates frost-induced crack has been modeled in finite element, based on phase field approach. User subroutine has bee, developed to allows the resolution of the coupled problem. Several parametric studies have been conducted to investigates the impact of the chosen phase field assumptions on the numerical cracking process. Phase field approach, however, has been proved relevant in modeling frost heaving impact to fracture on rock and rock-like materials. Further studies should be conducted to get an insight in the capacity of phase field model capture initiation and reduce the sensitivity of model to material’s parameters. Overall, the phase field model o ff ers a flexible and powerful tool for advancing our understanding of rock fracture mechanics under environmental impact and contributes to enhance the e ffi ciency of rock and rock-like structures.