Results 181 to 190 of about 16,551 (232)
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Wellbore Stability Analysis Using Elastoplastic and Thermo-Elastoplastic Approaches
ADIPEC, 2022Abstract Wellbore stability modeling has been known in the oil and gas industry and academia for a long time. The instability-related issues significantly impact field developments, especially in complex deep reservoirs. This instability can substantially jeopardize the drilling objectives, leading to poor wellbore conditions.
Osman Hamid, Gbenga Oluyemi, Reza Sanaee
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Elastoplastic Model for Cemented Soils
Journal of Geotechnical and Geoenvironmental Engineering, 2001This paper presents a model for bonded or cemented soils within the framework of hardening plasticity. The model is based on the concepts that (1) the strength of a cemented soil can be considered to be made up of two components, the usual strength of the soil skeleton and the strength of cementation bonds; and (2) the deformation of the soil is ...
Vatsala, A +2 more
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On the Numerical Implementation of Elastoplastic Models
Journal of Applied Mechanics, 1984A closed-form solution is given for the way stresses evolve during an elastoplastic time step under conditions of purely kinematic hardening or softening. When isotropic effects are included, the analysis becomes more difficult, so a perturbation solution is developed.
Yoder, P. J., Whirley, R. G.
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Elastoplastic Waves in Granular Materials
Journal of Applied Mechanics and Technical Physics, 2003For a description of the deformation of materials with different resistances to tension and compression, the conventional rheological diagram is supplemented by a new element --- rigid contact. It is used to construct a model of an ideal granular material possessing elastic and plastic properties.
Sadovskaya, O. V., Sadovskii, V. M.
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Eigenvalues of the Elastoplastic Constitutive Operator
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 1994The authors studied the eigenvalues of the elastoplastic constitutive operator. Although the elastoplastic operator has been studied extensively, little information seems to be known about its eigenvalues. In this paper a formal solution to the eigenvalue problem of the elastoplastic constitutive operator is presented.
Bigoni, Davide, D. Zaccaria
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1984
Rubbers are polymers whose glass transition temperatures lie below the application temperature. Soft rubbers are lightly chemically cross-linked and hard rubbers are strongly chemically cross-linked. Elastoplasts are polymers which are physically cross-linked at the application temperature, but they can be worked like thermoplasts at higher ...
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Rubbers are polymers whose glass transition temperatures lie below the application temperature. Soft rubbers are lightly chemically cross-linked and hard rubbers are strongly chemically cross-linked. Elastoplasts are polymers which are physically cross-linked at the application temperature, but they can be worked like thermoplasts at higher ...
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An interior‐point algorithm for elastoplasticity
International Journal for Numerical Methods in Engineering, 2006AbstractThe problem of small‐deformation, rate‐independent elastoplasticity is treated using convex programming theory and algorithms. A finite‐step variational formulation is first derived after which the relevant potential is discretized in space and subsequently viewed as the Lagrangian associated with a convex mathematical program.
Krabbenhoft, K. +3 more
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Runge–Kutta methods in elastoplasticity
Applied Numerical Mathematics, 2002zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Büttner, Jörg, Simeon, Bernd
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Elastoplastic torsion: twist and stress
Computing in Science & Engineering, 2004Consider a long rod made of metal, plastic, rubber, or some other homogeneous material. Hold the rod at the ends and twist one end clockwise and the other end counterclockwise. This torsion (twisting) causes stresses in the rod. If the force we apply is small enough, the rod behaves as an elastic body: when we release it, it will return to its original
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STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS
Within the framework of the planar cross-section hypothesis, the construction of calculation formulas for determining stresses and deformations in cross- sections of an elastoplastic member under conditions of planar transverse bending is considered. The rod material works according to a bilinear tensile pattern and resists both tension and compression
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Within the framework of the planar cross-section hypothesis, the construction of calculation formulas for determining stresses and deformations in cross- sections of an elastoplastic member under conditions of planar transverse bending is considered. The rod material works according to a bilinear tensile pattern and resists both tension and compression
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