In this study, we numerically and analytically investigate the impact perforation of sandwich panels made 0.8 mm 2024-T3 aluminum alloy skin sheets graded polymeric hollow sphere cores with four different gradient profiles. A suitable numerical model was conducted using LS-DYNA code, calibrated an inverse test, instrumented a Hopkinson bar, validated experimental data from literature. Moreover,...

The effects of both material data uncertainties the constituents and volume fraction deviations from design values caused by manufacturing process on forecasted stresses in a spherical container functionally graded (FGM) are investigated. Specifically, steel/alumina hollow sphere subject to internal pressure homogeneous heating is studied. It shown that even moderate may cause large expectation...