Experimental Research on Dynamic Behavior of Circular Mild Steel Plates with Surface Cracks Subjected to Repeated Impacts in Low Temperature

Table 1

Tensile test results at different temperatures.

Property	Unit	Ambient temperature
		20°C	−40°C
Density		7850	7850
Poisson’s ratio	—	0.3	0.3
Elastic module	GPa	202	212
Yield stress	MPa	168	184
Fracture strength	MPa	441	490
Fracture strain	—	0.42	0.33