应力轴

It is found that the wing crack extend along a curved path and gradually approximate to the line which passes the middle point of the main crack and is parallel to the direction of maximum principal stress.

采用数值和试验的方法对翼型裂纹的扩展路径进行分析，发现单轴下张开型裂纹的翼型裂纹的扩展路径逼近于过原主裂纹中心点、平行于最大主应力的一条直线。

With the deformation increasing, failure in the hollow specimen starts from the hole wall for the minor principal stress; and the bearing capacity drops off.

利用中晶和细晶两种人理岩的不同内径孔道大理岩试样，在内孔压力为0时进行常规三轴压缩试验，分析试样内非均匀应力分布对试样承载能力和变形特性的影响。

Vesic's solutions to cavity expansion that include cylindrical cavity expansion and spherical cavity expansion are introduced. Then cylindrical cavity expansion theory is applied to study compaction effect of pile driving in saturated soil. Based on the results of conventional triaxial tests, a trilinear curve model is used to simulate stress-strain curve of strain-softening materials. Meanwhile, trilinear curves are also used to simulate curves of volumetric strain, minor principal strain and major principal strain. By using elasto-plastic theory, analytical solutions to cylindrical cavity expansion in strain-softening soil are presented. According to the mechanism of statically pressed pile driving, compaction effect of pile tip can be viewed as hemispheric cavity expansion. Therefore spherical cavity expansion theory is applied to obtain the solutions to stress, strain, displacement fields and final pressure. Resistance force of pile tip is calculated to estimate static pressure.

介绍了Vesic关于圆孔扩张问题的解答，其中包括柱形孔扩张问题和球形孔扩张问题，并应用柱形孔扩张理论分析了饱和软土中的沉桩挤土效应问题；在常规三轴试验成果的基础上，采用三折线模型模拟具有应变软化性质的岩土材料的应力应变关系曲线，分析了在应变软化土体中沉桩时桩周土的位移场、应力场和应变场的变化，得到了解析解答；分析了静压桩的沉桩机理，并利用球形孔扩张理论，视桩端处的挤土为半个球形孔的扩张，分析了桩端处土的位移场、应力场和应变场的变化，并根据最终扩张压力计算出沉桩时的桩端阻力，可作为压桩力的估算。

Combining with the mechanics theory of yield and fracture of metal in classical mechanics and fracture mechanics,crack formation criteria of ductile metal in stress triaxiality space is deduced by studying fracture stress field in root of notched bar made by ductile metal.

结合经典力学和断裂力学对金属屈服和断裂解释的力学原理，通过对延性金属刻痕杆刻痕根部断裂应力场分析，推导了延性金属在应力三轴空间的微观裂纹形成准则。

Combining mechanics theory of yield and fracture of ductile metal in classical strength theory with microcosmic fracture mechanics,and by studying fracture stress field in root of notched bar made of constructional steel,the author brought forward loci equation of constructional steel in stress triaxiality space.

结合古典强度理论和微观断裂力学对金属屈服和断裂解释的力学原理，通过对结构钢深槽刻痕杆刻痕根部微观断裂应力场的数值模拟，导出了结构钢在应力三轴空间的屈服轨迹方程。

This peak arises from the preferential rotation of the axes of carbon pairs existed in the specimen under the influence of an alternating load.

在外加应力的作用下，这类碳原子对轴的择尤旋转便引起了内耗。根据这个机构并结合内耗测量过程中试样内部碳原子重新分布的情况，可以推导出碳浓度和内耗峰高度之间的定量关系，并从而求出合金的点阵空位形成能和构成碳原子对时所放出的能量。

At the same time, the relationship between screwing length and axial stress distribution of bolt screw thread is studied, which offers reference to the design of nut height.

文中还对旋合长度对螺栓轴向应力分布的影响也进行了研究，为螺母高度的设计提供了参考。

Shear force might be more important to bone adaptation than axial stress.

剪力对骨骼适应机制的作用可能大于轴向应力。

According to the results of triaxial compression test, the relationship of cement soil mixed with or without glass fiber concerning stress and strain in different ages and confining pressures was analyzed. Meanwhile, some parameters of cement soil mixed with glass fiber, such as shearing strength parameter, modulus of deformation and relationship between compression strength and deformation modulus were obtained.

根据玻璃纤维-水泥土的三轴压缩试验结果，分析了其在不同围压与龄期下的应力-应变关系，并得到玻璃纤维-水泥土的剪切强度参数、变形模量E50及变形模量与抗压强度qu的关系。

Then the hazard zone of tire/rim contact area with axial force of cord,Mises stress,shearing strain and strain energy potential were analyzed.

同时运用帘线轴力、M ises应力、剪切应变、应变比能4个力学量对胎圈部的危险区域进行了精细分析。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。