Vibration and Constitutive Relations of Viscoelastic Cantilever Beam of HTPB Propellant

Table 2

Relaxation modulus at various temperatures.

T (°C)/t (s)	−40	−20	0	20	40	70
2	16.01	7.50	5.67	4.12	3.94	3.30
5	13.51	6.38	4.87	3.63	3.49	2.92
8	12.39	5.88	4.51	3.41	3.28	2.74
10	11.89	5.65	4.34	3.31	3.19	2.66
15	11.03	5.26	4.06	3.13	3.02	2.52
25	10.03	4.81	3.73	2.92	2.82	2.35
50	8.82	4.26	3.33	2.66	2.58	2.14
80	8.09	3.92	3.08	2.49	2.42	2.01
100	7.76	3.77	2.97	2.42	2.35	1.95
200	6.83	3.34	2.65	2.20	2.15	1.78
250	6.55	3.21	2.55	2.13	2.08	1.73
500	5.76	2.84	2.28	1.94	1.90	1.57
800	5.28	2.61	2.11	1.82	1.79	1.48
1000	5.07	2.51	2.03	1.77	1.73	1.43
1500	4.70	2.34	1.90	1.67	1.64	1.36
1800	4.55	2.27	1.84	1.63	1.61	1.33