PSI - Issue 13

P.N.B. Reis et al. / Procedia Structural Integrity 13 (2018) 1999–2004 Author name / Structural Integrity Procedia 00 (2018) 000 – 000

2001

3

3. Results and discussion

Nominal bending stress versus flexural strain curves for all strain rates are plotted in Fig. 1. All curves exhibit a quasi-linear region followed by a non-linear region, due to homogeneous development of damage. From this figure, it is also evident that higher strain rates promote longer quasi-linear regimens and considerable effects on the flexural properties.

4.25×10 -2 s -1

4.25×10 -6 s -1

Fig. 1. Representative nominal bending stress versus flexural strain curves for all strain rates.

The effect of the strain rate on the flexural properties (modulus, strength and failure strain) is presented in Fig. 2, where the symbols represent the average values.

Bending strain [%]

Fig. 2. Effect of the strain rate on the flexural properties.