This article explores energy absorption related to all types of mobility vehicles, focusing on the use of crash tubes as Energy Absorption Systems (EAS). The study investigates the quasi-static axial crushing of tubular structures made from 304 stainless steel used as an energy dissipating system, aiming to enhance the dissipative capacity of these systems. In fact, the main objective of this experimental investigation is to study the effect of complex loading on the absorbed energy and the deformation mode using a specific device called ACTP, generating differnt complex loadings (simultaneous tensile and compressive stresses). Several configurations of plastic buckling are adopted, including the 53° biaxial (noted Bi-53°), which is the focus of this present study, with the classical uniaxial configuration, by way of reference. The main experimental results show a significant influence of the degree of complexity of the loading applied compared to the conventional uniaxial reference configuration. An increase in the average load and energy absorbed by the ACTP-Biaxial 53° in the order of 27% is obtained. A numerical model was developed using the finite element method to simulate the mechanical behavior of the tubes and, above all, to predict the dissipative capacities of this range of our unconventional systems. The results from this numerical model were then compared with those obtained from experimental crushing tests. The approach and optimized parameters were validated by demonstrating satisfactory agreement between the experimental and modeling results.