Dynamic Constitutive Relation Of Cement Treated Macadam And Its Application In The Numerical Simulation In Penetration-explosion

It is of strategic important to study on the responses of multi-layer structure of the airport runway under dynamic loads of penetration and explosion. The dynamic constitutive relation of cement treated base courses is an important component of the study on damage effects for anti-runway penetrating-exploding submunition. In order to meet demand of numerical simulation of penetration-explosion damage effect on the multi-layer structure, dynamic constitutive relation of cement stabilized macadam material was carried out in this study. The main contents include:The component of cement treated macadam was analyzed first in this paper. The constitutive model of concrete material can be used to describe its Behavior Because of the similarity between the two materials. The different performance between the two can be measured by uniaxial compressive strength. Therefore, RHT model is selected as the constitutive model of cement stabilized macadam material under penetration and explosion. Detailed analysis of the RHT model was made and parameters were divided into three categories. A set of methods to determine the values of the parameters of model was summarized. Set the reference value for parameter sensitivity analysis. AUTODYN software was used to establish a medium internal explosion numerical simulation method, which was verified when compared with the experimental data,to analyze the sensitivity of parameter under explosive loading .Damage area was selected as a quantitative index of damage. The area was obtained accurately by photo processing software. The Explosion sensitivity table of each parameter was calculated. Finally, a simulation of was established to describe the whole process of kinetic energy missile's penetration-exploding with the studied cement treated macadam model.