体应力

The action mechanism of back filling body and the control of back filling on rockbursts two parameters (stress release rate and average jamb stress) are researched in the thesis. The essence of filling reducing rockburst occurrence and increasing of recovery ratio is discovered.

本文研究了充填体的作用机理和充填对岩爆的两个控制参数-应力释放率和平均矿柱应力的控制，揭示了充填减缓岩爆发生、提高矿石回采率的内在本质。

The result showed that,if only the necessary but insufficient condition,the equilibrium condition ,was adopted to deal with the infinite uncertain boundary condition,the solution to the stress was non-unique due to the fact that the boundary problem here was a mal posed mathematic problem.

通过两个典型的半无限体实例，对水平表面作用无限均布压力下弹性地基的应力和位移解答进行研究，结果表明：对边界条件不明确的无限边界仅采用解答的必要非充分条件——平衡条件来等效处理，其应力解答不是唯一的，因为此时该边值问题不是一个适定的数学问题。

MAIN OUTCOME MEASURES: Standing on single or double feet was simulated to measure stress distribution, interface stress, and primary micromotion of femoral prosthesis in the three types.

主要观察指标：分别模拟单足和双足站立状态，测量3种股骨假体的应力分布、界面应力和初始微动情况。

The monotone property of multivariate function proved that the maximum stress strength point exists on the inner surface of

应用多元函数单调性理论，证明了在三轴应力条件下管体中最大应力强度值出现在套管内壁。

This paper analyzes the change of the primary stress in the vessel body and vessel head and the influence on the safety property of pressure vessel caused by the whole shape error based on finite element analysis. Some universal results are achieved.

本文以有限元应力计算为基础，分析了整体形状偏差所造成的筒体和封头的一次应力的变化情况及其对压力容器安全性能的影响，得出了一些具有普遍意义的结果。

The results show that dynamic softening is easy to occur in these ingots and flow stress becomes steady finally; the material constants of hot deformation are procedural parameters that stress-level coefficient α, strain rate sensibility exponent m and deformation activation energy Q are all increased with strain increasing, while stress exponent n is decreased gradually; the values α and m of the alloy homogenized are the biggest and the value n is the smallest, dynamic softening effect of the alloy is the most obvious, which can deform evenly; influence of strain on the value Q of the alloy homogenized is a little and the average value of Q is only 176.5kJ/mol, so the alloy is easy to deform; the alloy matrix shows the regular recrystallization grains when the strain is 50%; dislocation cell structure re-formed in the grains with increase of strain.

结果表明：经不同处理的Al-1Mn-1Mg合金均易发生动态软化并最终呈现稳态流变特征；热变形材料常数是过程量，随应变量的增加，应力水平参数α、应变速率敏感性指数m和热变形激活能 Q 随之增大，而应力指数 n 则逐渐减小；均匀化退火后，铝合金的α和m值最大而n值最小，动态软化效果最明显且变形均匀，在该状态下，铝合金的 Q 值受变形量影响小，平均仅为176.5kJ/mol，易进行热变形；当应变量为0.7时，基体呈现规则的再结晶晶粒组织，随着应变量的增加，晶内重新形成了位错胞结构。

In composite, the thermal residual stress in the matrix is tensile stress, and that in the particle is contract stress.

在复合材料中，基体中存在拉应力，颗粒中存在压应力。

C Taking the short-fiber reinforced and inhomogeneity spreaded composite materials as engineering background, singular integal equations of plane problem of interaction between line inclusion and circular inclusion are deduced, and some particular cases are analysed.

以短纤维和颗粒弥散体复合材料为背景，导出了线夹杂与圆夹杂相互作用平面问题的奇异积分方程，并对一些特殊情形作了退化分析，建立了数值法，给出了圆夹杂和线夹杂两侧的界面应力及线夹杂端点的应力强度因子表达式，同时作了具体的数值计算。

Based on the matrix strength stochastic distribution theory and the fiber failure stochastic distribution theory, the stress-strain behavior and the tangent tensile modulus are obtained for unidirectional composite (0$^\circ$ ply).

基于基体随机开裂、纤维随机断裂分布理论，得到正交铺层结构的应力-应变关系；基于体积平均方法，将纤维束波动部分进行分割，引入强度分析模型，得到纤维束波动部分的应力-应变关系。

By using finite element analysis software ANSYS,the 3-D model of real structure of waste heat boiler was built when the effect of tubesheet interacted with cylinder and tube was taken into account.Based on the mechanical stress analysis,the deformation of the tubesheet and the stress distribution diagram were obtained.

运用有限元分析软件ANSYS，对废热锅炉建立了考虑筒体和换热管影响的管板真正实际结构的三维模型，对其进行机械应力分析，得出管板的变形和应力分布云图。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。