Solid locket propellants are modeled as Maxwell Fluid with single spring and single dashpot in series Complete stress-strain curve is generated for case-bonded composite propellant formulations by taking suitable values of spring constant and damping coefficient Propellants from same lot are tested at different strain rate It is observed that change in spring constant, representing elastic part is very small with strain rate but damping constant varies significantly with variation in strain rate For a typical propellant formulation, when strain rate is varied from 0 00037 to 0 185 per second. spring constant (K) changed nom 5 5 to 7 9 M Pa. but damping coefficient (D) varied from 1400 to 4 M Pas For all strain rates, stress-strain curve is genetated using developed Maxwell model and close matching with actual test curve is observed This indicates validity of Maxwell fluid model for case-bonded solid propellant formulations It is observed that with increases in strain rate, spring constant increases but damping coefficient decreases representing solid rocket propellant as a title viscoelastic material It is also established that at higher strian rate. damping coefficient becomes negligible as compared to spring constant It is also observed that variation of spring constant is logarithmic with strain rate and that of damping coefficient follows cl power law The correlation coefficients are introduced to ascertain swing, constants and clamping coefficients at ally strain rate from that at a reference strain rate Correlation for spring constant needs a coefficient "H" which is function of propellant formulation alone and not of test conditions and the equation developed is K(2) = (K(1)-H) x {In(d epsilon(2)/(dt)/In(d epsilon(1)/dt)} + H Similarly lot damping coefficient (D) also another constant "S" is introduced and prediction formula is given by D(2) = D(1) x {(d epsilon(2)/dt)/(d epsilon(1)/dt)} Evaluating constants "H" and "S" at different strain rates validate this mathematical formulation for different propellant formulations Close matching of test and predicted stress-strain cur ye indicates propellant behavior as viscoelastic Maxwell Fluid Uniqueness of approach is to pi edict complete stress-strain curves. which are not attempted by any other researchers