介绍了关魏氏组织形成的贝氏体型切变理论、类马氏体相变理论和扩散型台阶长大理论。
The theories about formation of Widmonstatten, Bainite shear and Martensite transformation are introduced, and the theory about growth of diffusion types of ledge is recommended as well.
本文首先从切削剪切变形和刀具离散化理论出发，推导出高速铣削条件下铣削力和切削速度的关系模型。
A relation model between cutting forces and cutting speed is established for high speed milling condition on the basis of research into the theory of shear distortion and the discrete milling cutter.
抗剪强度和剪切变形是砼的基本力学性能，又是强度理论研究和有限元分析的重要数据。
Shear strength and shear strain are the basic properties in mechanics of concrete. They also serve as important data for finite element and failure criterion research on concrete.
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