The behavior of various thin-walled aluminum prisms subjected by axial impact loading in relation to the energy absorption abilities

Abstract

The thin-walled prism structure is a design that is widely used as impact energy absorbers. Various types of shapes and materials have been proposed to get the most effective design in energy absorption. In this study, a comparison of the various forms of the lidless aluminum prism was formed from the aluminum sheet 200 mm x 150 mm thickness of 1 mm. From this sheet, a prism is formed with a height of 150 mm with a base: circle, triangle, rectangle, pentagon, hexagon, and hexagon. A pounder made of steel weighing 26.49 kg hits a prism with a constant speed of 5 m / s. Deformation that occurs, axial stress and strain, absorbed energy and crushing mode are compared to get the best design. Modeling is designed using ANSYS WORKBENCH 19.1 Explicit Dynamic Student version. From the simulation results, it was found that the shape of the tube has the smallest deformation of 23.1 mm while the largest the triangular prism is 53.6 mm. However, the shape of the tube has the most abundant energy per unit length, which is 14.331,31 J / m, while the triangle shape has the smallest energy per unit length, 6176.09 J / m. Deformation of the tubes and hexagonal prisms shows results that are similar to each other compared to other prism forms.