研究了引入高精度数字散斑相关法光学测量技术对A９５ 陶瓷材料在准静态压缩试验中的变形过 程，得到了该材料在压缩变形过程不同时刻的试件表面的全场位移分布，推导出应力应变曲线与材料的本构 关系。与传统方法相比较，数字散斑相关法所具有的非接触、高精度、全场测量等特点，避免了人为干扰，可 以对试件表面全场的变形进行研究。

The ceramic materials have a series of excellent physical and mechanical properties.These properties make ceramic materials possess irreplaceable ascendancies in the area of anti-impact and anti-penetration when they act as armors and parts of the engines. And their superhard and superfragile characters will bring many new challenges to researchers, especially in the measurement of strain.The digital speckle correlation technique is introduced in this paper to study the distortion process of ceramic materials under the static loading. The methods of the sub-pixels search and bilinear interpolation are used in the digital image processing. As the digital speckle correlation method (DSCM) can't be directly used in measuring deformation, an improved multilevel DSCM is proposed. The mechanical properties of the A95 ceramic material is measured in the experiments. The results of the experiments are satisfied.