Determination of Stress Intensity Factors in Low Pressure Turbine Rotor Discs

Table 1

Stress intensity factors for different crack lengths and rotational speed.

				𝐾𝐼 [MPa(m)^1/2]
Crack lengths [m]	𝑎=0.0010 m	Rotational speed [o/min]	𝑛=3000	7.3373	7.6519	7.6059	7.5651	7.4727	7.2176
	𝑎=0.0010 m		𝑛=3300	8.6310	8.9799	8.9979	8.9631	8.8407	8.5053
	𝑎=0.0015 m		𝑛=3000	8.2728	8.6502	8.6411	8.6006	8.5149	8.1400
	𝑎=0.0015 m		𝑛=3300	9.7197	10.1864	10.1855	10.1434	10.0165	9.5799
	𝑎=0.0020 m		𝑛=3000	8.5604	9.0005	8.9857	8.9428	8.8593	8.4211
	𝑎=0.0020 m		𝑛=3300	10.0724	10.6150	10.6085	10.5644	10.4798	9.9285
	𝑎=0.0025 m		𝑛=3000	9.0887	9.5932	9.5977	9.5547	9.4731	8.9392
	𝑎=0.0025 m		𝑛=3300	10.6963	11.3151	11.3304	11.2683	11.2036	10.5392
	𝑎=0.0030 m		𝑛=3000	9.3531	9.5389	9.8753	9.8345	9.7341	9.1821
	𝑎=0.0030 m		𝑛=3300	10.8985	11.6519	11.6484	11.6067	11.5023	10.8108
Position of crack tip from the top surface [m]				0	0.002	0.004	0.006	0.008	0.010