Experimental and numerical analysis and multi-objective optimization of quasi-static compressive test on thin-walled cylindrical with internal networking

Abstract

ABSTRACTThe present study aimed at quasi-static compressive test on 6061-O aluminum cylindrical absorbers with internal networking. The cylindrical cellularization was in such a way that a square is welded to a thin-walled cylindrical at the middle of the sides. As one of the design of experiments (DOE) techniques the response surface method (RSM) was used to examine the effect of the parameters on energy absorption, peak force (PF), specific energy absorption per unit mass (SEA) and energy absorption per length (EA). The variables of thickness, height and length of square of the thin-walled cylindrical were considered in three levels. The samples were performed under a quasi-static compressive test at a constant speed of 10 mm/min. Then, the numerical simulation was performed using the finite element software (ABAQUS). The results obtained from the experiments and simulations were consistent. In accordance to the equations obtained from the experimental results, the multi-objective optimization was conducted considering maximum SEA conditions, EA conditions, and minimum PF conditions. The results indicated a direct relationship between thickness and length of square with responses, nonlinear relationship between height and responses, and the effect of thickness was greater than other parameters in all responses. Except for PF response, there was an interaction between the parameters in EA and SEA responses.