脆性材料的各向异性损伤及其测量方法

Anisotropic damage in brittle materials and its experimental measurement method

利用微裂纹扩展区损伤模型，以单向拉伸为例，讨论了脆性材料中微裂纹损伤引起的本构关系各向异性，定量说明了损伤对不同方向的柔度张量分量、波桑比的影响，揭示了脆性材料损伤本构关系的一些规律。并在此基础上提出了一种测量脆性材料损伤状态的柔度等效方法。

By using the damage model of domain of microcrack growth(DMG)for brittle materials,the anisotropy of constitutive relation due to microcracks, taken the uniaxial tension as an illustration,is discussed in this paper. The influences of damage on some components of effective compliance tensor and Poisson's ratios in differnt of damage on some show quantitatively.And based on these analyses,an experimental method of compliance equivalence is suggested to measure the damage state in a brittle material.