摘要
利用超声波测量技术测定了金属材料的一些基本参量 ,利用这些基本参量和传统意义上的损伤定义 ,从宏观、细观角度导出了不同的损伤变量表示式。它在保持损伤变量定义的一致性基础上 ,使材料的非线性特征与其缺陷建立了一定的联系 ,并可进行定量计算。处理后的试验数据表明 ,损伤变量D均随塑性应变量的增大而增大 ,且用基体应变和空穴体积率表示的细观损伤变量敏感程度最高。文中还利用A .C .
The authors make use of the acoustoelastic method to measure some basic parameters of the metal materials, so that various kinds of damage variables can be derived from the angle of macro and mesoscopic analysis. The authors have also found that not only the connections between the defects and non liner characteristics of the material can be established on the basis of consistent definition of damage variables, but also the quantitative calculation can be made. The experimental results have shown that the damage variables will increase with the increase of the plastic strains, and the value of the damage variable described with the basic body strain and the cave volume rate is the most sensitive. In addition, the differences among the damage variables are explained and analyzed in the theory of Continum Physics.
出处
《机械强度》
CAS
CSCD
北大核心
2001年第1期29-31,18,共4页
Journal of Mechanical Strength