Anti-blast properties of 6063-T5 aluminum alloy circular tubes coated with polyurea elastomer: Experiments and numerical simulations

摘要

This study aimed to explore the anti-blast performances of 6063-T5 aluminum alloy circular tubes coated with polyurea. First, quasi-static and dynamic mechanical performance experiments of AP103-type polyurea were carried out, and the basic mechanical parameters of AP103 type polyurea were obtained. The results showed that this type of polyurea has significant super-elastic characteristics at low strain rates, and it underwent yield slip and strain hardening at high strain rates. On this basis, anti-blast performance tests were conducted on 6063-T5 aluminum alloy circular tubes with different thicknesses of polyurea coatings, and the typical damage modes were summarized. The results showed that the anti-blast performances of the polyurea-coated aluminum alloy circular tubes significantly improved in terms of the degree of local deformation and the cross-sectional area. The energy change of the polyurea coating and the transmission of stress waves obtained from the numerical simulations revealed the anti-blast mechanism of the polyurea-coated aluminum alloy circular tubes. An engineering calculation formula for the thickness of the polyurea layer and the degree of local deformation of the aluminum alloy circular tubes was finally established.