查询词典 shear stress

First, based on the relations of stress and strain between the whole medium and its macroscopically isotropic constituents, an explicit relation between elastic matrices of the whole medium and its constituents was derived. Combining the explicit relation of elastic matrices with the strain's relation, two coefficient tensors were defined and analyzed to get a general relation between the hulk and shear modulus of the whole medium under the assumption that all the field variables are in a unified coordinate system. Secondly, combining these relations with the classical Hashin-Shtrikman elastic modulus bounds, four new expressions of elastic medium of the whole medium were obtained and compared with the original hounds. Last, these formulae were applied in the computation of effective elastic moduli of clean sandstone saturated with pore water.

首先基于整体介质与宏观各向同性组分满足的应力和应变组分关系，推导出整体介质弹性矩阵与组分弹性矩阵之间的显式关系，联合其应变关系，定义和分析了对应的两个系数张童，并据此导出了相关场变量位于统一坐标系时整体介质体积模量与剪切模量的关系；然后将经典的Hashin-Shtrikman弹性模量边界模型与上述关系式结合，得到4个新的整体介质弹性模量的估算公式，再与原始的Hashin-Shtrikman弹性模量边界进行了比较，最后针对饱和水纯净砂岩介质进行了试算。

As an example of application, the study on small scale shear failure of Al-Zn-Mg-Cu plate under complicated strain and stress states, especially within the plastic zone ahead of a pre-crack, would promote our understanding of the fracture mechanism, of the shielding effect caused by cracking path deflection, and of the mechanism of fracture toughness anisotropy of textured high strength aluminium alloys.

作为一个应用实例，本文关于Al-Zn-Mg-Cu厚板在复杂应力应变状态下的小尺度剪切失效机制的研究，对于了解工业高强变形铝合金的断裂过程、了解裂纹扩展途径偏斜所引起的shielding效应、了解断裂特征和断裂韧度的各向异性等实际问题也是很有启发的。并已被Materi-als Science and Technology认为是&an interesting piece of work containingsome original idea s&。

The faults include the fracture of saddle support mat, the breakdowns of saddle support bolt and pin spindle. Based on the analysis on the fracture and surface, the fault causes are analyzed, for the conclusions of the normal fatigue fracture, as well as the deficient gear hardness, higher contact stress of tooth face than the yield limit under shear of material and improper lubrication method, which bring serious abrasion deformation of tooth face.

其中，鞍座底板断裂，鞍座连接螺栓和销轴断裂，通过断口形貌和受力分析，判断故障原因为典型的疲劳断裂；大小齿面磨损变形严重是齿轮硬度不足，齿面接触应力超过材料抗剪屈服极限及润滑方法不当造成。

In this paper, test research have been performed on the two important mechanical properties indicator compressive modulus of elasticity and shear modulus. Numerical simulation has been performed on the base of results of test under the situation uniform and uneven thickness of elastomer layer, which analyze internal stress distribution of the elastomeric bearing, as follows:(1) The traditional test methods of compressive modulus of elasticity test are rather cumbersome and take up experimentalists lots of time. This paper has improved the traditional test methods of compressive modulus of elasticity test, which has collected the holding-load time together to concentrate on holding load. The tests have been performed on different types of bearings, which results show that the results of the improved test method conform to the error range regulated by the standard and can effectively save time for the experimentalists, also eliminate the accumulative error.

本文主要对板式橡胶支座的抗压弹性模量、抗剪弹性模量两个重要力学性能指标进行试验研究，并在试验结果的基础上对均匀胶层厚度和不均匀胶层厚度两种情况进行数值模拟，分析橡胶支座内部应力分布规律，具体内容如下：(1)传统抗压弹性模量试验方法比较繁琐，占用试验人员大量时间，本文对传统抗压弹性模量试验方法进行了改进，将持荷时间集中起来进行集中持荷，通过对不同类型支座进行试验，试验结果表明该改进试验方法所得结果符合标准规定误差范围，为试验人员节省了大量时间，并且还消除了传统方法中的累计误差。

Considered the crustal structure crossing the South Shetland Islands、Bransfield Strait and Antarctic Peninsula,we proposal a two phase rifting tectonical evolution model and layered shear model for the lithospheric deformation under extensional stress field.

通过横穿南设得兰群岛、布兰斯菲尔德海峡和南极半岛的地壳剖面，我们用分层剪切模式解释了在张性应力作用下的岩石圈变形特征。

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。