Competitive Failure of Loosening and Fatigue of Bolts under Composite Excitation

Table 1

Combinations of composite excitation in competitive failure tests.

Transverse displacement amplitude (mm)	Axial load amplitude (kN)	ξ (mm/kN)	Number of valid specimens
0.5	0	—	2
0.5	5	0.1	3
0.5	6	0.0833	3
0.5	8	0.0625	3
0.6	0	—	2
0.6	2	0.3	5
0.6	4	0.15	5
0.6	6	0.1	3
0.6	8	0.075	3
0.6	9.6	0.0625	3
0.6	10	0.06	3
0.7	0	—	3
0.7	2	0.35	3
0.7	5	0.14	3
0.7	7	0.1	3
0.7	8	0.0875	3
0.7	9	0.0778	3
0.7	11.2	0.0625	3
0.8	0	—	2
0.8	2	0.4	3
0.8	4	0.2	3
0.8	6	0.1333	3
0.8	8	0.1	3
0.8	10	0.08	3
0.8	12	0.0667	3
0.8	12.8	0.0625	3
0.9	0	—	3
0.9	2	0.45	3
0.9	4	0.225	3
0.9	6	0.15	3
0.9	9	0.1	3
0.9	14.4	0.0625	3
1.0	0	—	3
1.0	1	1	3
1.0	2	0.5	3
1.0	4	0.25	3
1.0	10	0.1	3
1.0	12	0.0833	2
0	12	0	1