Issue 53

P. Fathi, Frattura ed Integrità Strutturale, 53 (2020) 457-473; DOI: 10.3221/IGF-ESIS.53.36 465 1. The specimen is placed on the fixed and lower jaw of the machine and the pendulum hits the larger jaw and the impact tensile is applied to the specimen. 2. The specimen that is closed on the pendulum and with the lower jaw pendulum of the larger supporter holding the specimen, hits the bottom of the machine and the impact tensile on the specimen. Figure 7: Failed specimen after testing. Test result Standard number Measurement index 561 ISIRI 10919 Fracture energy of against tensile strength (kJ/m2) 427 523 558 561 526 The ultimate strength response against tensile impact failure Table 5: Impact tensile test results. Figure 8: Failed specimen. N UMERICAL C ALCULATIONS n the design of the model, an attempt has been made to model the failure or rupture of the crush, and this can be seen in the failure patterns of the specimens at the software output. Critical points that begin to fail are connected around the pin hole or visible from the sides and inclined to the back of the pin. In these materials, each layer is supporting a certain amount of stress. If it exceeds the unit value, it means that the layer will fail, but the multilayer may still be able to I