The Load Capacity Model and Experimental Tests of a New Yielding Steel Prop

Table 1

Property parameters for the model.

Parameters	Value
Radius of steel ball (/mm)	2.5
The gap distance between inner and outer tube (/mm)	1
Prescribed displacement in direction (/mm)	2
Length of inner tube (/mm)	100
Wall thickness of inner tube (/mm)	10
Young’s modulus of inner tube (/GPa)	210
Poisson’s ratio of steel ball and inner tube	0.3
Friction coefficient between the steel ball and inner tube	0.03
Yield strength of inner tube (/MPa)	690