Effect of Axial Vibration on Sliding Frictional Force between Shale and 45 Steel

Table 4

Summary of experimental results.

Number	Lubricant	(mm)	(Hz)	(mm/min)	(N)	Null		(N)
VS1	Dry	3	15	20	30	1	12.29	2.82	0.094
VS2	Dry	4	16	40	60	2	24.58	5.88	0.098
VS3	Dry	5	17	60	90	3	36.87	9.27	0.103
VS4	Dry	6	18	90	120	4	49.16	14.4	0.12
VS5	Dry	8	20	120	150	5	61.45	16.8	0.112
VS6	Water	3	16	60	150	5	60.80	18.45	0.123
VS7	Water	4	17	90	30	1	12.16	3.42	0.114
VS8	Water	5	18	120	60	2	24.32	6.36	0.106
VS9	Water	6	20	20	90	3	36.48	8.55	0.095
VS10	water	8	15	40	120	4	48.64	11.64	0.097
VS11	WBM	3	17	120	60	4	21.60	5.34	0.089
VS12	WBM	4	18	20	90	5	32.40	5.49	0.061
VS13	WBM	5	20	40	120	1	43.20	8.4	0.07
VS14	WBM	6	15	60	150	2	54.00	11.25	0.075
VS15	WBM	8	16	90	30	3	10.80	2.34	0.078
VS16	OBM	3	18	40	150	3	40.50	5.4	0.036
VS17	OBM	4	20	60	30	4	8.10	1.02	0.034
VS18	OBM	5	15	90	60	5	16.20	2.58	0.043
VS19	OBM	6	16	120	90	1	24.30	4.05	0.045
VS20	OBM	8	17	20	120	2	32.40	3.36	0.028
VS21	SBM	3	20	90	90	2	29.13	6.39	0.071
VS22	SBM	4	15	120	120	3	38.84	9.36	0.078
VS23	SBM	5	16	20	150	4	48.55	9.3	0.062
VS24	SBM	6	17	40	30	5	9.71	1.95	0.065
VS25	SBM	8	18	60	60	1	19.42	4.02	0.067