1) critical maximum principal stress
临界最大主应力
2) maximum principal stress
最大主应力
1.
The multi-point fracturing of oil well vertical to the orientation of the maximum principal stress can improve development effectiveness of the ultra-low permeab.
采用交错井网,用直井注水的方法,在油井水平段垂直于最大主应力方向进行多点有效压裂,能有效地提高特低渗透油藏开发效果。
2.
The soil cutting experiment indicates that the interior friction angle and the shear intensity of soil is reduced;and the maximum principal stress is decreased due to the vibration load;it induces the decrease of digging resistance.
从理论上研究了振动掘削岩土的减阻机理,土壤剪切试验结果表明,振动载荷能够使土壤的内摩擦角变小、抗剪强度下降、最大主应力值减小,从而导致挖掘阻力降低;对土壤在静态载荷和振动载荷作用下的失效过程进行了对比仿真实验研究,可知土壤在振动加载的条件下强度显著下降,并提前于相同条件的静态加载而破坏,同时跟踪X方向的载荷发现,振动掘削最大掘削阻力可降低50%。
3.
Because there was dissension in the maximum principal stress orientation obtained by in-situ stress measurements by different results measurements,the principal stress axis was determined by conjugate joints,fault occurrence,rake angle and shift symbol of fault slip.
针对地应力场测量给出的区域最大主应力方向常常有争执,且不同的测量方法结果也不同。
3) maximal principal stress
最大主应力
1.
This paper proposes two identification methods of maximal principal stress and its orientation by analysing the stress formula of bevelface.
通过对平面应力状态下斜面上正应力公式的分析 ,提出了最大主应力方位的两种判定方
2.
The critical J integral and the maximal principal stress under joint intensity theory was used as the criteria of crack starting of con-rod,the stress,plastic strain and displacement field were analyzed,and the distribution of crack starting points were displa.
对连杆准静态裂解进行了数值模拟分析,对裂纹区网格划分、接触与约束处理、无应力投影功能与自适应加载步长等关键技术进行了探讨;运用临界J积分和最大主应力准则作为连杆启裂的判据,分析了启裂时连杆应力场、塑性场及位移场,给出启裂点的分布状况。
3.
Based on the stresses calculated, the maximal principal stress was taken as the control criterion of the effects of H/B and the distance between bridle rods on the stress of cross section of aqueducts, and the relationship between the aqueduct stress and the rod distance was derived.
利用有限元法详细计算了不同H/B下无拉杆和不同拉杆间距简支梁式矩形渡槽槽身的应力,根据计算应力,以最大主应力作为控制标准,分析了H/B以及拉杆间距对槽身横截面应力的影响,提出了渡槽槽身应力与拉杆间距之间的关系。
4) critical stress
临界应力
1.
Improving buckling critical stress of sheet with the elastic pressure on the surfaces of sheet and it's application
板面弹性压板力对提升板料失稳临界应力的作用及其应用
2.
The distribution of interior critical stress of different casings under different circumstances are analyzed by way of the establishment of nonlinear FEM,also the critical in-situ stress equations of different operating interior pressures are achieved.
通过建立非线性有限元模型,分析了不同条件下不同套管内壁临界应力的变化规律,得到了不同生产内压下的临界地应力方程。
3.
In the paper,based on the governing equations of buckling,the buckling equation of anti-symmetrically laminated plate is established and the critical stresses are calculated under two-axial compressive loads in-plane.
应用屈曲控制方程,导出了反对称层合板在面内双向压缩下的屈曲方程,计算了相应的临界荷载并讨论了层合角对临界应力的影响,分析表明层合角对材料的临界应力有较大的影响。
6) ratio of maximum main stress difference
最大主应力差比
补充资料：主应力
主应力
principal stress
zhuyingli主应力(prineipal stress)没有切应力作用的截面上的法向应力。经数学证明，金属塑性加工时于变形物体内某一点的应力状态可用下式所表示的二次曲面来确定: A“一‘X“十乞丁2+氏Z“+2场叉丫 +2殊yZ十2屯Z尤(1)式中A为任意常数，几、丐、么和rx.、，、几分别为作用在通过该点所引三个相互垂直坐标面上的正应力和切应力，X、Y、Z为此二次曲面上某点的坐标。当所取坐标轴的位置发生变化时，即用新的坐标来表示该曲面时，式中各项的系数将发生变化。这样，通过上述确定应力状态的点总可以引出这样三个相互垂直的平面(与坐标面平行)，在其上仅有正应力而无切应力。主应力符号的脚标分别用l、2、3表示，以分别代替正应力的脚标x、y、z。这样，所得到的三个主应力应为。1、。2、a:，分别作用在三个坐标面上。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条