Vibration and Constitutive Relations of Viscoelastic Cantilever Beam of HTPB Propellant

Table 1

Relaxation modulus test conditions.

Temperature (°C)	Stretching speed (mm/min)	Initial constant strain (%)	Preload (N)	Relaxation sampling time (s)
−40, −20, 0, 20, 40, 70	500	5	2	2, 4, 8, 20, 40, 80, 120, 200, 400, 600, 1000