Investigating the Effect of Preimpact Energy Dissipation on Coefficient of Restitution regarding the Slope-Boulder Interaction

Table 2

Calculation parameters of the slope material.

Material	Unit weight (kN/m^3)	Internal friction angle (°)	Elastic modulus (MPa)	Poisson’s ratio	Thickness (cm)
Plastic simulated turf	6.86	20	7.8	0.24	2
Sand	15.40	30	15.0	0.25	4
Wood	17.15	37	35.0	0.20	2
Concrete	21.56	40	50.0	0.17	4