PSI - Issue 81

Oleh Yasniy et al. / Procedia Structural Integrity 81 (2026) 244–250

250

length grows while the average distance between cracks decreases. This indicates progressive densification and intensification of the crack system. Stress fields reveal strong localization near crack tips and interaction zones. These features correlate with the predicted directions of crack growth. The model successfully represents mixed-mode effects and crack path deviation. The introduced geometric limitation allows partial consideration of three-dimensional effects in a two-dimensional formulation. Numerical stability is maintained over a wide range of loading cycles. The simulated trends agree well with physical expectations of thermal fatigue behavior. The results demonstrate the dominant role of crack interaction at advanced stages of damage. The approach provides detailed insight into damage accumulation and structural degradation. It enables quantitative assessment of thermal fatigue resistance under varying loading conditions. Overall, the proposed methodology represents a reliable and efficient tool for predicting thermally induced cracking. References Ahmadi,A., Zenner, H., 2005. Simulation of microcrack growth for different load sequences and comparison with experimental results. International Journal of Fatigue 27(8); 85-3861. Beck, T., Lohe, D., Luft, J., Henne, I., 2007. Damage mechanisms of cast Al-Si-Mg alloys under superimposed thermal-mechanical fatigue and high-cycle fatigue loading. Mater Sci Eng A 468–470; 184–192. Erdogan, F., Sih, G.C., 1963. On the crack extension in plates under plane loading and transverse shear. J. Basic Eng. 85; 519–527. Firouzdor, V., Rajabi, M., Nejati, E., Khomamizadeh, F., 2007. Effect of microstructural constituents on the thermal fatigue life of A319 aluminium alloy. Mater Sci Eng A 454– 455; 528–535. Haddar, N., Fissolo,A., 2005. 2D simulation of the initiation and propagation of crack array under thermal fatigue. Nuclear Engineering and Design 235; 945–964. Haddar, N., Fissolo,A., Maillot, V., 2005. Thermal fatigue crack networks: an computational study International Journal of Solids and Structures 42(2); 771–788. Kamaya, M., Taheri, S., 2008. A study on the evolution of crack networks under thermal fatigue loading. Nuclear Engineering and Design 238(9); 2147–2154. Kasahara, N., Takasho, H., Yacumpai, A., 2002. Structural response function approach for evaluation of thermal striping. Nuclear Engineering and Design 212(1– 3); 281–292. Liu, X.W., Plumbridge, W.J., 2007. Damage produced in solder alloys during thermal cycling. J Electron Mater 36(9); 1111–1120. Maillot, V., Fissolo, A., Degallaix, G., Degallaix, S., 2005. Thermal fatigue crack networks parameters and stability: an experimental study. Int. J. Solids Struct. 42; 759–769. Malésys, N., Vincent, L., Hild, F., 2009. A probabilistic model to predict the formation and propagation of crack networks in thermal fatigue. International Journal of Fatigue 31(3) 2009; 565–574. Mansoor, M., Islam, I., Taquir, A., 2007. Restricted life of after burner manifold assemblies due to stress raisers. Eng Fail Anal 14; 1280–1285. Maruschak P., Danyliuk I., Bishchak R., Vuherer T., 2014. Low temperature impact toughness of the main gas pipeline steel after long-term degradation. Central European Journal of Engineering 4, 408-415. Pasternak, I., Pasternak, R., Sulym, H., 2013. A comprehensive study on the 2D boundary element method for anisotropic thermoelectroelastic solids with cracks and thin inhomogeneities. Engineering Analysis with Boundary Elements 37(2); 419–433. Rémy, L., Alam, A., Haddar, N, Köster, A., Marchal, N., 2007. Growth of small cracks and prediction of lifetime in high temperature alloys. Mater Sci Eng A 468– 470; 40–50. Taheri, S., 2007. Some advances on understanding of high cycle thermal fatigue crazing. J Press Vessel Technol 129(3); 400–410. Tohgo, K., Suzuki, H., Shimamura,Y., Nakayama, G., Hirano, T., 2009. Monte Carlo simulation of stress corrosion cracking on a smooth surface of sensitized stainless steel type 304. Corrosion Science 51(9); 2208–2217. Ubachs,R.J.L.M., Schreurs, P.J.G., Geers, M.G.D., 2007. Elasto-viscoplastic nonlocal damage modeling of thermal fatigue in anisotropic lead-free solder. Mech Mater 39; 685–701. Yasniy, P., Maruschak, P., Bishchak, R., Hlado, V., Pylypenko, A., 2009. Damage and fracture of heat resistance steel under cyclic thermal loading. Theoretical and Applied Fracture Mechanics 52(1) 22–25. Yasniy O., Pyndus Yu., Iasnii V., Lapusta Y., 2017. Residual lifetime assessment of thermal power plant superheater header. Engineering Failure Analysis 82, 390 403.