THE NUMERICAL ANALYSIS OF THE CARRYING CAPACITY OF A STIFFENED COMPOSITE PANEL WITH IMPACT DAMAGE

Abstract

The results of numerically analyzing a stringer-stiffened multilayer composite panel under local dynamic loading, followed by axial quasi-static compression of the damaged panel with slowly increasing longitudinal loading, are presented. The analysis was done in the framework of LSDYNA software complex. The effect of impact damage of the panel of a polymeric composite material on the static carrying capacity of a stiffened panel loaded in compression was analyzed. The analysis shows that increasing the mass of the striker from 1 to 10 kg for a fixed kinetic energy of 136 J results in the increase of the damaged zone by 15−20%. The presence of a local dynamic damage zone reduces the carrying capacity of a panel loaded in compression by more than two times. The reliability of the numerical results is corroborated by good agreement between the computational and experimental data.

Keywords: polymeric composite materials, panel, stringer, impact loading, quasi-static compression, carrying capacity, numerical analysis.