PSI - Issue 68

Danilo D’Andrea et al. / Procedia Structural Integrity 68 (2025) 746–755 D’Andrea et al./ Structural Integrity Procedia 00 (2025) 000–000

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is about 31 MPa, in agreement with the stress value obtained with the STM. The stepwise test was performed with a stress ratio R = 0.1.

(a)

(b)

Figure 5. a) Temperature evolution during a stepwise test of Nylon PA12 reinforced with 15% of carbon fibres at frequency of 2 Hz and stress ratio R = 0.1; b) Stabilization temperature versus applied stress level.