• Title/Summary/Keyword: Saint-Venant's stress function

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Mathematical Understanding of the Saint-Venant Approximation in Analysis of a Transverse Isotropy (평면이방성 분석에서 Saint-Venant 근사식의 수학적 해석)

  • Park, Chulwhan;Park, Chan;Park, Jung-Wook;Jung, Yong-Bok
    • Tunnel and Underground Space
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    • v.26 no.5
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    • pp.363-374
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    • 2016
  • All five independent elastic constants of a transversely isotropic rock sometimes need to be determined from a single specimen. Saint-Venant approximation has been widely used for a long time in the analysis of single specimen test. This paper has proven how this empirical equation can be mathematically transformed into a form of the apparent Young's modulus based on theory of elasticity. The transformed equation is a monotonous function on anisotropic angle and can be useful in the analysis of the in-situ stress measurement in an anisotropic rock mass. The estimations of data in literatures have shown that the measured values of $G^2$ are uniform on anisotropic angles and smaller than that of Saint-Venant's case. This decrement may be caused by sliding of the interface of strata and the decrement rate is inferred to relate well with the combination of bonding condition of strata and strength of rock material. Accumulation of these kinds of studies in the future enables to define the decrement and to determine elastic constants of a transversely isotropic rock from a single specimen from modifying Saint-Venant approximation.

The Stress Field in a Body Caused by the Tangential Force of a Rectangular Patch on a Semi-Infinite Solid

  • Cho, Yong-Joo;Kim, Tae-Wan;Lee, Mun-Ju
    • KSTLE International Journal
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    • v.2 no.1
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    • pp.29-34
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    • 2001
  • The stress field in a body caused by the tangential loading of a rectangular patch on a semi-infinite solid has been solved analytically using a potential function. The validity of the results of this study was preyed by Saint-Venant's principle in the remote region and by the superposition of point loads in the vicinity of the surface.

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The stress field in the body by tangential loading of a rectangular patch on a semi-infinite solid (반 무한체 위의 사각조각 면에 작용하는 접선하중에 의한 반 무한체내의 응력 해석)

  • 이문주;조용주
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 1999.06a
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    • pp.20-29
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    • 1999
  • The stress field in the body by tangential loading of a rectangular patch on a semi-infinite solid has been solved analytically using Boussinesque's potential function. Its validity was proved by saint-venant's principle in remote region of the and in the vicinity of the surface with superposition of point loads.

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The Stress Field in the Body by Tangential Loading of a Rectangular Patch on a Semi-Infinite Solid (반 무한체 위의 사각조각 표면에 작용하는 접선하중에 의한 반 무한체내의 응력 해석)

  • Lee, Mun-Ju;Gu, Yeong-Pil;Jo, Yong-Ju
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.24 no.4 s.175
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    • pp.1032-1038
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    • 2000
  • The stress field in the body by tangential loading of a rectangular patch on a semi-infinite solid has been solved analytically using potential function. The validity of result of this study was proved by Saint-Venant's principle in the remote region and in the vicinity of the surface with superposition of point loads.

On the Thermal Stress and Residual Stress Distributions in a Aluminum Alloy Plate due to Resistance Spot Welding (알루미늄합금(合金)의 저항용접(抵抗熔接)에 따른 열응력(熱應力) 및 잔류응력(殘留應力)의 해석(解析))

  • Zae-Geun,Kim;Hyo-Chul,Kim
    • Bulletin of the Society of Naval Architects of Korea
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    • v.9 no.2
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    • pp.21-32
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    • 1972
  • The problems of thermal stress and residual stress in resistance spot welding are studied from two standpoint namely, effect of temperature distributions and effect of the radius of free boundary. The radius of the region where the temperature distributions are occured is taken as a function of time after welding and as a finite size, 6 times of heated zone. The region of the radial stress distribution is treated as a function of time under Saint-Venant's principle and 6 or 12 times of originally heated zone. Thermal stresses and strains are obtained by analytic solution under constant mechanical properties and by the finite difference method for varing properties under temperature variation. From the computed results following conclusions are derived (1) For the engineering purpose, the region of temperature distribution and stress distribution can be treated as a finite region, $R=r_o=6r_e$ (2) If the maximum temperature of the aluminum alloy plate is less than $500^{\circ}F$, thermal stresses and strains can be obtained with constant mechanical properties. (3) The residual stresses and strains will be remained in welds and its vicinity.

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Torsional rigidity of arbitrarily shaped composite sections by hybrid finite element approach

  • Darllmaz, Kutlu;Orakdogen, Engin;Girgin, Konuralp;Kucukarslan, Semih
    • Steel and Composite Structures
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    • v.7 no.3
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    • pp.241-251
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    • 2007
  • The purpose of this study is to calculate the torsional rigidity of arbitrarily shaped composite sections on the basis of hybrid finite element approach. An analogy is used between the torsion problem and deformation of a plate which exhibits only shear behavior. In the analysis a simple hybrid finite element based on Hellinger-Reissner functional is presented and a set of numerical examples are performed to demonstrate and asses the performance of the developed element in practical applications.