Energy Absorption Analysis and Multi-Objective Optimization of Tri-Layer Cups Subjected To Quasi-Static Axial Compressive Loading

In this paper, the energy absorption features of tri-layer explosive-welded deep-drawn cups subjected to quasi-static axial compressive loading are investigated numerically and experimentally. to produce the cups, tri-layer blanks composed of aluminum and stainless steel alloys were fabricated by an explosive-welding process and formed by a deep drawing setup. the quasi-static tests were carried out at a rate of 2 mm/min. based on the structure of the tri-layer cups and to calculate the energy absorption features of these structures, a numerical model was established and validated by experimental findings. moreover, based on a surrogate model and using non-domain sorting genetic algorithm ii, multi-objective optimizations were performed on specific energy absorption and initial peak load. the results indicated that the total absorbed energy and mean crush force of the pure stainless steel tri-layer cup were about 5.8 and 5.7 times the values of those for the pure aluminum specimen, respectively.