作为第四强度理论的近似计算，目前在套管柱强度设计中广泛应用双向应力椭圆理论。
The Bilateral Stress Elliptic(ellipse of plasticity) Theory is widely used in casing strength designing, as an approximate alternative to the four th strength theory.
基于这种裂纹单元，作者引入椭圆参数方程，推出一种计算裂纹前缘点应力强度因子的新方法。
Based on this kind of crack element, and by introducing parametric equation of ellipse, a new method for estimating stress intensity factor is proposed.
在分析受不均匀荷载作用的立井井壁应力和位移的基础上，提出了确定立井井壁椭圆荷载的反分析方法。
On the basis of the analysis of shaft lining stress state and displacement state, proposed the back analytical method for determination of the elliptic load acting on shaft lining.
本文推导了二维无限介质内嵌异性介质椭圆的弹性应力场分布。
For a two-dimensional infinite medium containing an elliptical inclusion of different material, elastic stress distribution formulas are derived.
结果表明，开裂点、开裂角、最大切向拉应力和临界载荷随椭圆的纵横轴比和倾角的不同而变化，由此可得到最危险的倾角。
The results show that opening point, opening angle, maximal tangential stress and critical load vary with aspect ratio and inclined angle. The most dangerous inclined angle is obtained accordingly.
分析了椭圆孔口端点和裂纹端点处的变动态应力。
Stress analysis in variation states at crack tip and notch crown tip is presented.
二次调质后，堆芯段筒体锻件产生了椭圆变形，为了不影响锻件已有性能，采用冷校形加去应力回火方法进行校正。
In order to keep the property of forging pieces which they already have, calibrating in the way of cold correcting the shape with stress release and tempering could get a better result.
计算了成形后交叉缩放椭圆管的残余应力分布并比较了三个典型截面上的残余应力状况。
The three-dimensional distribution of residual stress was investigated and the residual stresses on three representative sections were compared.
本文用椭圆抛物面作为混凝土三向应力时的强度破坏面。
An elliptic paraboloid is proposed as the failure surface for concrete under multiaxial Stresses.
进而通过对椭圆形井眼周围岩石应力分布的分析，对不同岩性的地层确定了不同的井眼稳定性条件。
By analyzing the rock stress state around the elliptic borehole, the stability conditions are established for different types of formation.
研究了开椭圆孔有限板的应力集中问题。
The paper studies the stress concentration of finite plates containing multiple large holes.
本文用边界配置方法计算了不同情形下含偏心裂纹椭圆盘受均布载荷时的应力强度因子。
In this paper, boundary collocation method is used to calculate stress intensity factors of an eccentric crack in an elliptical disc subjected to a uniform tension stress.
从控制成型残余应力峰值和合缝预焊后管口椭圆度的角度出发综合考虑，将管坯成型为扁椭圆较为合理。
It is reasonable takes shape the unfinished piping to the flat ellipse for reduce the remaining stress peak value and ellipticity.
试验和计算的结果表明：弹性角隅的应力集中系数比椭圆弧角隅降低15%左右。
According to results of tests and calculations, it is shown that the stress concentration coefficient of elastic corner is less about 15% than the ellipse arc corner.
阐明了在椭圆荷载作用下立井井壁的应力状态和位移状态。
In this paper described are shaft lining stress state and displacement state.
同时，进行了算例分析，给出了椭圆夹杂内和夹杂基体界面上应力和应变的分布规律。
In addition, numerical examples are given and the distributions of stress and strain inside the inhomogeneity and at the interface are illustrated.
运用薄膜理论分析了旋压椭圆形封头的本质及其应力分布，指出了它与标准椭圆形封头不等效的原因及替代关系。
The reason of non equality and the replacement relation between standard elliptical head and spinning elliptical head are also introduced.
探头周围介质若非各向同性时，应力系数可用椭圆的解析式拟合。
As there are anisotropy in the media surrounding the sonde, the stress coefficients may be fitted with the analytical function of the ellipsoid.
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当轴向应力与剪应力幅值的比值保持不变时，砂土液化强度随着椭圆面积的增大而降低。
For the same ratio of two stress components, the resistance to liquefaction of saturated sand decreased with the increasing area of the elliptical stress path.
通过三维光弹实验测定了轴表面横向半椭圆裂纹的应力强度因子（SIF），并计算了与光弹轴裂纹几何及当地应力相对应的无限大体的SIF，从而求得SIF修正系数。
The SIF and its correction factor of the transverse surface semi-elliptic crack of a photoelastic axle are tested and studied with the method of three dimensional photo-elastics.
通过三维光弹实验测定了轴表面横向半椭圆裂纹的应力强度因子（SIF），并计算了与光弹轴裂纹几何及当地应力相对应的无限大体的SIF，从而求得SIF修正系数。
The SIF and its correction factor of the transverse surface semi-elliptic crack of a photoelastic axle are tested and studied with the method of three dimensional photo-elastics.
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