Effects of Hole Perpendicularity Error on Mechanical Performance of Single-Lap Double-Bolt Composite Joints

Table 3

Test groups and parameters.

Group	Pattern	β/°	Repeat
P0-0	P0	0	3
P0-0-30	P0	0	1
P1-4	P1	4	3
P1-4-30	P1	4	1
P2-2	P2	2	3
P2-4	P2	4	3
P2-4-30	P2	4	1