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81.
Yu. K. Rubtsov 《International Applied Mechanics》2006,42(7):832-841
The paper discusses the scaled-boundary method as applied to electroelastic problems. As an example, the stress-intensity
factor is calculated for a thin rectangular piezoelectric plate with an edge crack
__________
Translated from Prikladnaya Mekhanika, Vol. 42, No. 7, pp. 124–134, July 2006. 相似文献
82.
HU Yuan-tai 《应用数学和力学(英文版)》2005,26(8):996-1006
IntroductionRecently much attention has been paid to Green’s functions[1 -7]for anisotropic mediabecause of their important applications in boundary element methods used widely inengineering analysis. Generally speaking, it is relatively easy to obtain G… 相似文献
83.
A. M. Khludnev 《Journal of Applied Mechanics and Technical Physics》2005,46(5):717-729
The equilibrium problem for an elastic body containing a crack on the interface between two media is considered. It is proved that there exist invariant (independent of the integration surface) integrals in this problem. The existence of invariant integrals is also established in the problem of a contact between an elastic body and a rigid stamp. Nonlinear boundary conditions of mutual non-penetration are prescribed on the contact boundaries. The physical meaning of invariant integrals is established.__________Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 46, No. 5, pp. 123–137, September–October, 2005. 相似文献
84.
研究条形平板中平行于上下边界的单一裂纹的识别问题。给出了当一声波入射这一条形平板时,裂纹参数与反射、透射系数之间的关系式,并应用遗传算法对裂纹进行了定量识别。计算结果表明本文给出的方法具有较好的识别精度。 相似文献
85.
The non-singular and bounded terms for stresses near the crack tip were investigated. The crack problem in a transversely isotropic piezoelectric solid for the plane problem was dealt with. The principle of superposition and the Plemelj formulation were introduced. The non-singular terms are given by solving Rieman-Hilbert problem. It is shown that the non-singular terms are influenced by the elastic and electric constants. 相似文献
86.
The kinetics of crack growth in a viscoelastic orthotropic plate made of a composite material is analyzed. The external load is the superposition of a cyclic load and a constant tensile load. The level of the tensile load is assumed to exceed the amplitude of the cyclic load. The kinetic curves are compared with the constant tension curves. The effect of the cyclic component is studied.Translated from Prikladnaya Mekhanika, Vol. 40, No. 9, pp. 116–122, September 2004. 相似文献
87.
用解析方法研究了非均匀弹性材料中反平面运动裂纹问题。首先采用余弦变换求解非均匀材料的基本方程,然后根据混合边值条件建立裂纹运动的对偶积分方程,再把对偶积分方程化为第二类Fredholm积分方程。给出了数值算例,计算结果表明材料的非均匀性对动应力强度因子有较大的影响。 相似文献
88.
A fracture criterion of the type of the Neuber-Novozhilov criterion is proposed to describe the fracture in the vicinity of the tip of a V-shaped notch under tensile and shear loading. In the proposed criterion, the limits of averaging of the stresses along the notch axis depend on the presence, location, and size of the initial defects in the material. The crystal lattice parameter of the initial material is chosen for the characteristic linear size. For a V-shaped notch subjected to tension and shear, simple equations are obtained that relate the stress intensity factors for the modified singularity coefficients, the singularity coefficients themselves, and the theoretical tensile and shear strengths of a single crystal of the material taking into account the damage to the material in the vicinity of the notch tip. The equations obtained allow a passage to the limit from a notch to a crack. It is shown that the classical critical stress intensity factor used in the strength analysis of cracked solids is not a material constant.Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 46, No. 1, pp. 106–115, January–February, 2005. 相似文献
89.
J. J. Rushchitsky 《International Applied Mechanics》2005,41(11):1288-1298
General principles are formulated for modeling the elastic deformation of materials and analyzing plane waves in nonlinearly
elastic materials such as hyperelastic, hypoelastic, and those governed by the general law of elasticity. The results of studying
the propagation of plane waves in hypoelastic materials are further outlined. The influence of initial stresses and initial
velocities on the types and number of plane waves is studied. Wave effects characteristic of hypoelastic materials are predicted
theoretically. One of such effects is blocking of certain types of plane waves by initial stresses
__________
Translated from Prikladnaya Mekhanika, Vol. 41, No. 11, pp. 96–107, November 2005. 相似文献
90.
V. O. Yablonskii 《Fluid Dynamics》2005,40(2):256-265
Numerical simulation is used to study the dynamics of non-Newtonian free-surface flow in a cylindrical-conical hydrocyclone. For different angles of taper of the conical section of the hydrocyclone, the pressure and velocity distributions are calculated, together with the dependence of the fluid film thickness on the axial coordinate. The effect of the rheological properties of the fluid and the controlling similarity parameters on the flow dynamics is studied.__________Translated from Izvestiya Rossiiskoi Academii Nauk, Mekhanika Zhidkosti i Gaza, No. 2, 2005, pp. 102–112.Original Russian Text Copyright © 2005 by Yablonskii. 相似文献