Abstract:Aiming at the application problem of different liner materials in the multimode warhead, the effects of performance parameters of the liner materials on the forming of dual mode damage elements, explosively formed penetrator (EFP) and jetting projectile charge (JPC) were studied. Based on the Johnson-Cook′s constitutive model, the single variable method was used to change the material parameter values. The influence of material characteristic parameters on the forming of dual mode damage elements was simulated and calculated by ANSYS/LS-DYNA software. X-ray imaging verification test of three kinds of liner materials, aluminum, iron and copper was performed. Results show that the tip velocity and length-diameter ratio of dual mode damage elements, EFP and JPC, are exponentially decreasing with the increase of yield stress, strain hardening coefficient, strain hardening exponent, temperature correlation coefficient and strain hardening exponent under quasi-state. The density has the greatest influence on the tip velocity of the EFP and JPC, and the yield stress and the hardening coefficient have the greatest influence on the length-diameter ratio of the EFP. The formula calculating the tip velocity and length-diameter ratio of the dual mode damage elements considering the influence of material properties were presented by fitting. The error between calculated results and experimental ones for tip velocity and length-diameter ratio of the dual mode damage elements, EFP and JPC formed by three kinds of liner materials, aluminum, iron and copper is less than 10%, revealing that the two results are in good agreement.