Study on master curve of tensile strength of thermal aging composite modified double base propellant

Abstract In order to study the mechanical properties of thermal aging composite modified double-base propellant (CMDB), tensile CMDB were investigated at four temperatures (323, 293, 273, 253 K) and different strain rates (3.3 × 10- 5 - 3.3 2 s −1 ). Uniaxial tests carried out on samples with time (0,10,20,35,50,65,80,100 d). The after studied. results show that maximum strength decreases time, value fluctuates within a certain range (Δσ<30 %). master curve was obtained by using time-temperature equivalence principle (TTSP), equation established. can be used predict in quasi-static rate.