Extrapolation-Based Scale Effect Model for Granular Heap Modulus

Table 7

Geometric characteristics of the breakable ball pack.

Width of specimen B  B(mm  mm)	Height of specimen H(mm)	Diameter of ball (mm)	Number of balls	Ball material	Initial void ratio
60 × 60	48.2	20	18	PMMA	7.94
		10	9