Research development of numerical simulations for blast-induced injury of organisms
Following the requirements of high-precision numerical simulation and evaluation for blast-induced injury of organisms,numerical algorithm of blast-induced injury,mechanical constitutive model and parameter determination methods,and mechanical variables for induced injury in different organs are summarized.Based on current research of numerical simulation for blast-induced injury of organisms,the dominant factors influencing evaluation accuracy of blast-induced injury are analyzed:① Existing constitutive model theory applicable for describing blast-induced injury is uncompleted,it is required to further develop mechanical model considering the nonlinear effects of plasticity,damage,and strain rate effects and to improve the method of parameter determination of the model.② Existing injury characterizing variables of organisms have not been unified,it is necessary to pay attention to comparing numerical and experimental results,determining the dominant mechanical parameters which affect the injury of different organs,and obtaining the accurate injury thresholds.③Compared with explosion in free field,the propagation of shock wave caused by explosion in confined space is more complicated.It is necessary to further develop the high-precision simulated methods of injuries caused by explosion in confined space and to reveal related injury mechanisms.
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