UHPC dynamic constitutive model under impact and explosion load:a state of the art review
The dynamic constitutive model of concrete is the key to the accuracy of numerical simulation under impact and explosion loads.The existing dynamic constitutive models of concrete are based on ordinary concrete and cannot be directly applied to ultra-high performance concrete(UHPC)materials.Currently,there is a lack of widely accepted dynamic constitutive models for UHPC materials.It reviews various dynamic constitutive models for ordinary concrete based on different theories and experiments,summarizes the current research of dynamic constitutive models for UHPC materials,and finally analyzes the dynamic constitutive models for UHPC materials.The analysis shows that the current UHPC dynamic constitutive models are theoretically a damage plastic constitutive model,and the current UHPC dynamic constitutive model is actually an improvement on the existing ordinary concrete dynamic constitutive model.It also the idea of constructing a UHPC constitutive model,and the key is how to combine the mechanical properties of UHPC materials.At the same time,the shortcomings of UHPC dynamic constitutive model research are pointed out,providing a reference for further establishing suitable UHPC dynamic constitutive model.