stress ellipse

Opening point, opening angle and maximal tangential stress on ellipse edge are presented under uniaxial compression, biaxial compression and uniaxial compression with fissure water pressure respectively.

分别给出了单向压力、双向压力、单向压力与裂隙水压力共同作用3种情况下椭圆边缘开裂点的位置、开裂方向和最大切向拉应力值。

Aimed at the problems of the theory of biaxial stress ellipse, a new method for casing strength design under combined loads the triaxial stress theory is put forward.

针对双向应力椭圆理论存在的问题，提出了解决组合载荷下套管柱强度设计的三向应力圆理论；

If the loaded flat extrusion container is predigested as a model of a infinite plane with a ellipse hole in the center, the maximum theoretical stress is quite closed to that measured from the experiment.

如果把扁挤压筒的受力模型简化成中间带椭圆孔的无限大平面的弹性力学模型，理论最大应力值与实验结果比较接近。

The delamination area of GLARE was dual ellipse. Crack propagation and delamination propagation were the two fracture mode during the fatigue cycles of GLARE. They were both related to the fiber bridging stress and interacted, which caused the stable propagation of cracks in GLARE.

分层破坏区域呈双椭圆形，裂纹扩展和分层扩展是GLARE层板疲劳过程中的两种损伤模式，二者均与纤维的桥接应力相关，并相互牵制促使GLARE层板的裂纹相对稳定扩展。

Accident Analysis and Protective Measure on the Stress Corrosion of the Lower Ellipse Head of Reaction Still

反应釜下封头应力腐蚀断裂事故分析和预防措施