By employing the shear lag theory, the basic equations of interfacial mechanics for the elastic zone and the plastic zone are established respectively.
利用界面应力剪滞理论，分别建立弹性区和塑性区的界面力学基本方程。
The elastic plastic deformation and stresses of the micro composite are studied according to the shear lag theory and strain-hardening law.
按剪滞理论和应变硬化规律研究微复合材料的弹塑性变形和应力状态。
However, Domestic technology lag behind foreign technology in some areas, such as volume control with plastic, sand thickness uniformity control.
但在一些关键技术上，如含胶量控制，夹砂层厚度均匀性控制，与国外同类产品还存在一定的差距。
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