Theoretical prediction of energy absorption by rectangular metal columns subjected to lateral compression by solid cylindrical indenter

This article derives some theoretical equations to predict the energy absorption capacity by the rectangular columns during the lateral compression between a solid cylindrical indenter and a rigid platen in the quasi-static condition. For this purpose, a new theoretical model of deformation is introduced and based on the energy method the total absorbed energy of the mentioned structure is calculated. To investigate verity of the present theory, some rectangular aluminum specimens were prepared and compressed between the indenter and the platen. The instantaneous absorbed energy-displacement diagram of each specimen was sketched and compared with the corresponding theoretical curve. Comparison of the results indicates a good correlation and it affirms precision and accuracy of the theory. The present theory shows that the total absorbed energy by a rectangular column during the indentation process is dependent on the column material flow stress, column length, wall thickness and indenter radius. The experimental and theoretical results show that by increasing the indenter diameter, the total absorbed energy by the structure increases, too.

کلیدواژه ها:

Energy absorption ، lateral compression ، solid cylindrical indenter ، empty aluminum column ، experimental method ، theoretical equations