摘要
为了提高SCG模型在冲击高温高压以及静高压等加载条件下的适应性,提出了一个修正的模型。根据第一性原理的计算结果,提出用一种幂函数的形式计算0 K等温状态下材料的剪切模量。考虑了压力、温度对材料剪切模量的交互作用。提出了一个包含压力作用完整项和温度、压力一阶交互作用项的修正模型。模型的相关参数由静高压、高温数据确定。修正模型在冲击高温高压状态下得到了Al、Cu两种材料实验数据的验证。与原始的SCG模型比较,修正的模型在不同材料、不同加载条件下表现了更好的精度和普适性。
In order to improve the precision of SCG model in the states of shock high pressure and high temperature, and its applicability in hydrostatic or other conditions, a modified model is presented. According to the calculation results by the firstprinciple, a kind of power function is applied to compute the shear modulus of material along 0 K isothermal line. The interaction of temperature and pressure on the shear modulus is taken into account. A modified mode including the full pressure action item and one order interaction of pressure and temperature is put forward. The model＇ s parameters are confirmed from high temperature and high-pressure experiment or theoretical calculation data. In shock compress condition, it is verified by experimental results of AI, Cu. Comparing with the original SCG model, the modified form is more precise and universal in conditions for different materials and different kind of loading.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第16期87-90,113,共5页
Journal of Wuhan University of Technology
基金
中国工程物理研究院科学技术基金(10632080)
国防预研基金(51327010101)
关键词
本构关系
SCG模型
剪切模量
冲击波
constitutive relationship
SCG model
shear modulus
shock wave
