Low velocity impact behaviour of curved nano composite Panel- A Numerical study

Abstract

This paper presents a numerical interrogation of the impact behaviour of steel and nano polyurea composite panels of the different radii of curvature (Infinite, 305 ROC, 112 ROC) with 203 mm × 203 mm × 1.5 mm thick subjected to low-velocity impact. Three-dimensional non-linear FE analysis using the LS DYNA code was used to replicate the experimental impact testing. It has been found that the numerical results closely resemble the test results reported in the literature. Based on the validated finite element model, the effect of impact velocity (1.98 m/s, 2.43 m/s & 2.8 m/s), impactor shapes (flat, hemispherical, and conical) and different thickness combinations (0.5 mm nanopolyurea-1 mm steel, 1 mm nanopolyurea-0.5 mm steel, 0.8 mm nano polyurea- 0.7 mm steel, 0.4 mm steel-0.7 mm nano polyurea-0.4 mm steel) on the low-velocity impact were studied. The numerical results make it evident that all the above configurations have a significant impact on the low-velocity impact.