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81.
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Stress-strain state of a half-space in the neighborhood of a stiff sphere subjected to a normal load
I. K. Senchenkov V. I. Kozlov I. G. Rubtsova A. B. Oleinikov 《International Applied Mechanics》1988,24(4):331-336
Institute of Mechanics, Academy of Sciences of the Ukrainian SSR, Kiev. Institute of Ultrahard Materials, Academy of Sciences of the Ukrainian SSR, Kiev. Translated from Prikladnaya Mekhanika, Vol. 24, No. 4, pp. 19–25, April, 1988. 相似文献
84.
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The dynamic coupled thermoelastic problem formulation and the thermodynamically consistent theory of inelastic behavior of
materials are used to solve an axisymmetric problem for a steel disk subject to a heat pulse at the center. The temperature
dependence of the physical and mechanical properties of the disk is taken into account. The problem is solved by the FEM.
The evolution in time and features of the strain-stress and thermal states of the disk and the dynamic effects accompanying
the processes of heating and gradual cooling are studied
__________
Translated from Prikladnaya Mekhanika, Vol. 44, No. 5, pp. 45–57, May 2008. 相似文献
88.
Ya. A. Zhuk I. K. Senchenkov O. P. Chervinko G. A. Tabieva 《International Applied Mechanics》2001,37(12):1585-1593
An approximate formulation is given to the axisymmetric dynamic thermoviscoplastic problem with coupled mechanical and thermal fields. The formulation employs an approximate cyclic thermoviscoplastic model based on the concept of complex moduli. The distribution of the field quantities and the temperature— and amplitude—frequency resonant characteristics of a circular disk under forced flexural vibrations are studied. The capabilities of the approximate model in solving this class of problems are also studied 相似文献
89.
Certain aspects of the correct definitions of stress and strain concentration factors for elastic-viscoplastic solids under
cyclic loading are discussed. Problems concerning the harmonic kinematic excitation of cylindrical specimens with a lateral
V-notch are examined. The behavior of the material of a cylinder is modeled using generalized flow theory. An approximate
model based on the concept of complex moduli is used for comparison. Invariant characteristics such as stress and strain intensities
and maximum principal stress and strain are chosen as constitutive quantities for concentration-factor definitions. The behavior
of time-varying factors is investigated. Concentration factors calculated in terms of the amplitudes of the constitutive quantities
are used as representative characteristics over the cycle of vibration. The dependences of the concentration factors on the
loads are also studied. The accuracy of Nueber's and Birger's formulas is evaluated. The solution of the problem in the approximate
formulation agrees with its solution in the exact formulation. The possibilities of the approximate model for estimating low-cycle
fatigue are evaluated.
S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kiev, Ukraine. Translated from Prikladnaya
Mekhanika, Vol. 35, No. 2, pp. 15–22, February, 1999. 相似文献
90.