正交各向异性材料的三维动态本构模型及其在脉冲X射线热击波模拟中的应用  

A Dynamic Constitutive Model of Anisotropic Material in Three-Dimensional Strain and Its Application in the Simulation of Thermal Shock Wave Induced by X-Ray Radiation

作　　者：张昆[1] 汤文辉[1] 冉宪文[1] ZHANG Kun;TANG Wen-Hui;RAN Xian-Wen(College of Science ,National University of Defense Technology ,Changsha 410073,China)

机构地区：[1]国防科学技术大学理学院,湖南长沙410073

出　　处：《高压物理学报》2017年第6期727-734,共8页Chinese Journal of High Pressure Physics

摘　　要：基于三维应变条件下的应力-应变关系,利用Grüneisen物态方程、PUFF物态方程以及Tsai-Hill屈服准则和Johnson-Cook强度模型,建立了正交各向异性复合材料的三维动态本构模型。在此基础上,对一种碳酚醛材料在高能脉冲X射线辐照下所产生的热击波传播现象进行了三维模拟,得到了热击波模拟结果,并将各向异性本构模型与各向同性本构模型的模拟结果进行对比。分析表明,各向异性本构模型不仅反映了固体材料各向异性的特点,而且还能描述材料转变为气体后的动力学行为。模型的建立为各向异性复合材料在脉冲辐照环境下的应用打下重要的理论基础。Based on the stress-strain relationship in three-dimensional condition, we established a dynamic constitutive model of an anisotropic composite material using the Griineisen, PUFF equations of state, Tsai- Hill yield criterion and the Johnson-Cook stress model and then simulated the thermal shock wave propagation induced by a high energy density X-ray impulse in a C/TF material. The results for the anisotropic constitutive model and the isotropic constitutive model were compared, and the analysis show that the anisotropic constitu- tive model proposed in this study can not only reflect the anisotropy of the material, but also describe the dy- namic behavior of the vaporized material. Our model lays an important theoretical foundation for the application of anisotropic composite material in irradiation environment.

关 键 词：各向异性材料 本构关系 X射线热击波 

分 类 号：O347[理学—固体力学]