Study on Joint Damage of Double Prefabricated Fragments Penetrating Finite Thickness Concrete

Table 11

Results of multifactor ANOVA of overall combined damage.

	Sum of squares	df	Mean square	F	p value
Intercept	36	1	36	21.176	0.010
Falling point spacing	7.6	4	1.9	1.118	0.458
Angle of penetration surface	0.4	4	0.1	0.059	0.991
Fragment 1 angle	2.4	4	0.6	0.353	0.831
Fragment 2 angle	3.6	4	0.9	0.529	0.723
Speed combination	5.2	4	1.3	0.765	0.599
Residual	6.8	4	1.7
R^2 = 0.738