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圆管表面斜裂纹应力强度因子和临界裂纹长度仿真分析（Simulation of Stress Intensity Factors and Critical Crack Length of Surface Oblique Crack on Round Tube）
表面斜裂纹 应力强度因子 临界裂纹长度 应变能密度
2010/12/28
针对圆管表面斜裂纹，建立基于弹性断裂理论和复变函数理论的计算模型。研究圆管表面斜裂纹发生扩展时临界状态所对应的应力强度因子和裂纹临界尺寸在各种相关因素影响下的变化规律。以I、II型复合裂纹为例，采用应变能密度理论对其进行了分析。对开裂角、裂纹所处角度及裂纹的几何尺寸等因素的影响进行仿真计算。得到裂纹所处角度对复合型裂纹两个应力强度因子影响的曲线，并对其影响的程度进行了比较。另外，对裂纹所处角度和开...
Chances and factors of economical farming
farming on land multifunctional agriculture environment intensification organic agriculture
2014/3/29
The contribution is focused on an analysis of the existing forms of farming in Czech agriculture which are characterised by an economical way of farming on agricultural land. Forms, an extent and econ...
Factors influencing intensity of competition in the Czech dairy industry
dairy industry branch, competition competitive force concentration growth rate exit barriers
2014/3/28
The paper is a part of solution of the research plan of the FBE MUAF in Brno, No. GAMSM 431100007, and it is focused on analysis of factors influencing intensity of competition fight among the existin...