Abstract: Based on X-ray electronic computed tomography technology,a three-dimensional finite element model was established to reflect the true structure of closed-cell aluminum foam.Firstly,the quasi-static and dynamic compressive mechanical properties of closed-cell aluminum foam were analyzed based on experiments and numerical simulations.Then the deformation characteristics and mechanical properties of closed-cell aluminum foam were analyzed.Finally,the reliability of the model was verified.The results show that a long platform stage appears on the stress-strain curve of closed-cell aluminum foam under quasi-static and dynamic loading.Under quasi-static compression,the specimens exhibit local plastic deformation mainly along the loading axis at 45°.At low compression rate,the deformation mode is the same as under quasi-static compression,stress concentration occurs first in the structural weakness of the closed-cell aluminum foam specimen,until material plasticity bend.Under high-speed compression,the loading end of the specimen first reaches the yield stress.Comparing the yield strength at different strain rates,the yield strength of closed-cell aluminum foam under dynamic compression is higher than that of quasi-static compression.When the strain rate of closed-cell aluminum foam specimen is 280~700 s^-1,the change of yield strength is not obvious.The strain rate increases to 2 000 s^-1,and the yield strength increases slightly.