PSI - Issue 32

Anatoly M. Bragov et al. / Procedia Structural Integrity 32 (2021) 340–344 Author name / Structural Integrity Procedia 00 (2019) 000–000

343

4

Figure 3. Graphs of specific energy absorption of sand-lime brick at different loading modes by strain rate It can be seen that the dependences energy - strain are nonlinear. Moreover, it is necessary to do more work in order to achieve a certain value of strain at an increase in the strain rate. The shape of the curves of the energy intensity of sand-lime brick is similar to the shape of analogical curves for other brittle media obtained by Bragov et al. (2015).

Figure 4. Influence of strain rate on energy characteristics of sand-lime brick

Table 1. Specific energy absorption coefficients Energy absorption type

A

B

Pre-fracture energy E 1 Post-fracture energy E 2

0.00035 0.00123 0.00158

-0.0356 0.516

Full energy E

0.48

The values of the above-described energy characteristics of sand-lime brick were determined and its dependences versus the strain rate were plotted. The maximum value of the strain rate before fracture was taken in