PSI - Issue 28

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Giacomo Risitano et al. / Procedia Structural Integrity 28 (2020) 1449–1457 G. Risitano et al./ Structural Integrity Procedia 00 (2019) 000–000

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Fig. 5. Comparison between experimental and numerical temperature vs. applied nominal stress.

Focusing on the first part of the temperature trend (Fig. 6), it is evident how the experimental temperature deviates from the linearity for a nominal macroscopic stress level approximately equal to the limit stress. It is easy to distinguish the two phases: the first where both experimental and simulated temperature show a linear trend and the thermoelastic coefficient K m is able to properly fit it, and the second, where the experimental and simulated temperature have different trends.

Fig. 6. End of the thermoelastic phase. Experimental vs. numerical temperature trend.