PSI - Issue 61

Mehmet N. Balci et al. / Procedia Structural Integrity 61 (2024) 331–339 Balci and Yalcin / Structural Integrity Procedia 00 (2019) 000 – 000

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increased for all values of crack length. In the hot shock case, crack-tip stress field is shear-dominant for small cracks but it tends to be opening mode dominant especially for small cracks at larger shock time, and this behaviour is seen in Fig. 5(d).

Fig. 5. The influence of crack length on (a) Normalized mode-I SIF vs time, (b) Normalized mode-II SIF vs time, (c) Total energy release rate vs time, (d) Phase angle vs time in a hot thermal shock Case-A configuration.

Fig. 6 . The influence of surface coating’s elastic modulus on (a) Normalized mode -I SIF vs time, (b) Normalized mode-II SIF vs time, (c) Total energy release rate vs time, (d) Phase angle vs time in a hot/cold thermal shock Case-A configuration.

Fig. 6 shows the fracture parameters of the coating system under hot/cold thermal shock for various values of coating material’s elastic modulus. Solid lines show results of cold shock while dashed lines show results of hot shock. Elastic