Study on the Mechanism of Sparks Generated Mechanical Friction

Table 1

Measurement of the flight trajectory of TC4 sparks.

Speed (m/s)	S0 (mm)	S1 (mm)	S2 (mm)	S3 (mm	S4 (mm)	S5 (mm)	S6 (mm)	S7 (mm)	S8 (mm)	S9 (mm)	S10 (mm)
31.4	4.5	0.85	0.775	0.7	0.65	0.55	0.5	0.45	0.4	0.35	0.3
	3.25	0.75	0.65	0.55	0.45	0.35	0.3	—	—	—	—
	4.25	0.95	0.85	0.8	0.7	0.6	0.55	0.5	0.45	0.4	0.35
41.9	4.5	1.05	0.9	0.8	0.7	0.6	0.5	0.45	0.4	0.35	0.3
	3.05	1.05	0.9	0.8	0.7	0.6	0.55	0.5	0.45	0.4	0.35
	2.5	0.85	0.65	0.55	0.45	0.35	0.3	—	—	—	—
52.3	1.75	2.15	1.4	1.15	0.9	0.75	0.65	0.55	0.45	0.4	0.35
	6.25	1.6	1.3	1.05	0.9	0.8	0.7	0.6	0.5	0.45	—
	4.75	1.8	1.5	1.25	1.05	0.9	0.8	0.7	0.6	—	—
62.8	5.75	1.35	1.1	0.9	0.75	0.6	0.5	0.45	0.4	—	—
	5.5	1.5	1.2	1	0.75	0.65	0.55	0.5	0.45	0.4	—
	4	2	1.55	1.3	1.05	0.9	0.75	0.65	0.55	—	—
73.2	6.25	1.1	0.85	0.7	0.65	0.6	0.55	—	—	—	—
	2.5	1.65	1.35	1.1	0.95	0.8	0.7	0.6	0.5	—	—
	1.9	1.85	1.5	1.25	1.05	0.9	0.8	0.65	0.6	—	—