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Crashworthiness of cellular metals with a linear density gradient was analyzed by using cell-based finite element models and shock models.Mechanisms of energy absorption and deformation of graded cellular metals were explored by shock wave propagation analysis.Results show that a positive density gradient is a good choice for protecting the impacting object because it can meet the crashworthiness requirements of high energy absorption,stable impact resistance and low peak stress.
Crashworthiness of cellular metals with a linear density gradient was was analyzed by using cell-based finite element models and shock models. Mechanisms of energy absorption and deformation of graded cellular metals were explored by shock wave propagation analysis. Results show that a positive density gradient is a good choice for protecting the impacting object because it can meet the crashworthiness requirements of high energy absorption, stable impact resistance and low peak stress.