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tangential stress
    FINITE DIFFERENCE ALGORITHM FOR SOLVING THE TANGENTIAL STRESS AT THE BOUNDARY IN THE BOUNDARY ELEMENT METHOD
    边界元法分析中边界切向应力的有限差分算法
    This paper gives a description on the corresponding relationship between the injection pressure at rock breakage and that at sound emission,behavior of the frequency and amplitude of sound wave,and gives fracturing stresses corresponding to zero or negative tangential stress respectively.
    本文记述了模拟野外地壳应力场的室内水压致裂真三轴实验中,岩石产生声发射时的注入压力和岩石破坏时的注入压力的对应关系,以及声发射频率、幅度等方面的表现,记述了岩样在零切向应力及负切向应力时对应的破裂压力。
    It can be seen from this that there is quite different in the distribution of tangential stress σ_θ and the intensity of stress σ_i for elastic-power hardening and power hardening materials.
    计算结果表明对于弹性—幂强化材料和幂强化材料,切向应力σ_0和应力强度σ_i的分布具有明显的差别。
    In this paper, difference method is used for solving tangential stress at the boundary on the basis of BEM.
    本文在边界元法分析的基础上,用差分法计算边界切向应力
    The difference equations for the boundary tangential stress are derived in the case of constant boundary element.
    推导出常边界单元情况下边界切向应力的差分公式。
    The method and equations developed also can been used to calculate the boundary tangential stress in the case of higher boundary element.
    所研究的方法和公式也适用于高次边界单元的边界切向应力的计算。
    The tangential stress at the boundary can not be gained directly in the application of Boundary Element Method to analysing elastic stress.
    在用边界元法作弹性应力分析中,不能直接计算出弹性体边界切向应力
    The difference formulas for the boundary tangential stress are derived for the constant boundary elements.
    推导出常边界元情况下边界切向应力的差分公式。
    The method developed in the article also can be used to calculate the boundary tangential stress of higher boundary elements.
    所研究的方法也适用于高次边界单元的边界切向应力的计算。
    Gradient of tangential stress increases along with the increase of brittle index of rocks, and the maximal tangential stress occures at some distance from the inner surface of the cylinder.
    围岩的切向应力梯度随着材料脆性指数的增加而增大,厚壁圆筒临近整体破坏时,最大切向应力位于距筒壁内表面一定深度处。
    By using linear elastic theory, formulae for tangential stress on ellipse edge are derived.
    根据线弹性理论,导出了椭圆裂纹边缘的切向应力的表达式。
    The main reason for the above results is as following. The Q-system considers the high field stress by introducing σ-θ/σ-c,σ-θ is the maximum tangential stress(estimated from elastic theory),and σ-c the uniaxial compression strength(MPa).
    出现上述现象的主要原因有:Q系统通过最大切向应力与岩石抗压强度的比值σθ/σc的大小,反映高地应力对围岩类别的影响。
    It is proved that the obtained radial and tangential stress curve link glossily at hardening zone radius r= Rs and softening zone radius r= R,and curve of tangential stress σθpo-r a has not up-pinnacled stress concentration especially,the result goes all the way with the experiment result of Japanese scholar Jiuwubosheng.
    证明了所求得的巷道围岩径向和切向应力曲线在硬化区半径r=Rs和软化区半径r=R处均光滑连接,特别是所求得的切向应力σθpo-r a曲线没有尖峰向上的应力集中,此结果与日本学者久武胜保的试验结果一致。
    This paper introduced the results of crustal stress measurement by hydraulic fracturing method within 3 vertical boreholes of a highway tunnel in east China,and the estimation formula of stress in tunnel axis' horizontal plane and the maximum tangential stress in cross section were analyzed and deduced,which was used in the tunnel's shape selection and rockburst possibility judgment.
    通过华东某公路隧洞3个深钻孔的水压致裂法地应力测量结果,分析并推导得到了隧洞轴线水平面上的应力和隧洞轴线横截面内最大切向应力的估算公式,并用于隧洞形状选择及隧洞开挖时岩爆可能性判断。
    DIFFERENCE METHOD FOR SOLVING THE TANGENTIAL STRESS AT THE BOUNDARY BY BEM
    边界元法分析中的边界切向应力差分算法
    DETERMINATION OF FRACTURE CORE REGION AND MODIFIED MAXIMUM TANGENTIAL STRESS CRITERION
    金属材料断裂核区的确定与对最大切向应力断裂准则的修正
    OPTIMIZATION OF HOLE SHAPES BASED ON OPTIMALITY CRITERION-MINIZATION OF THE MAXIMALLY TANGENTIAL STRESS(ABSOLUTE VALUE) ON THE BOUNDARY OF HOLE
    以孔边绝对值最大的切向应力最小为优化准则的孔洞形状优化
    Increment of temperature would produce heat stress, which enlarges wall rock's tangential stress, when rock redistribute' stress exceeds the intension of rock strengthowing to temperature fluctuation as far as easily occur shear failure, consequently resultinduces sand production.
    温度升高会产生了热应力,使围岩的切向应力增大,当由于温度变化产生的膨胀应力和原地应力引起的井壁围岩重新分布的应力超过岩石强度时,就易发生剪切破坏;
    5. Affected by the backfilling, the tangential stress of shotcrete has a tendency is for pressure stress to be tensile stress; it is dangerous to induce the axial cranny.
    ⑤ 采空回填区对曲墙喷层应力影响较大,尤其是对喷层的切向应力有由压应力向拉应力发展的趋势,有诱发纵向张裂隙的危险。
    In the mean time, for the investigation about surface tension effect on micro fluid fountain flow, the simulation in consideration of surface tension was firstly processed and results show surface tension influence on the distribution of velocity and pressure in fountain region is week, but its tangential stress acting on the fluid front leads to large deformation of the shape of front.
    同时,为了研究表面张力效应对喷泉流动的影响规律,在微流体喷泉仿真中首次引入表面张力效应,得出表面张力对微流体前沿喷泉流动区域的速度压力分布影响很小,但其在流体前沿自由表面上产生切向应力使流体前沿的形状出现较大变形。
 

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