[1]https://www.researchgate.net/publication/346231603_Dynamic_mechanical_properties_of_closedcell_aluminum_foams_with_uniform_and_graded_densities

[2]https://www.researchgate.net/publication/251632612_Elastoplastic_constitutive_model_of_aluminum_all oy_foam_subjected_to_impact_loading

[3]https://en.wikipedia.org/wiki/Viscoelasticity#:~:text=Maxwell%20model,- Main%20article%3A%20Maxwell&text=When%20a%20material%20is%20put,as%20the%20stress%20is%20appli ed.