Results 11 to 20 of about 14,048,300 (182)
A wellbore creep model based on the fractional viscoelastic constitutive equation
Petroleum Exploration and Development, 2017 To simulate the evolution of wellbore creep accurately, predict and prevent severe accidents such as borehole wall sloughing, casing collapse and sticking of the drill, based on previous studies, the springpot element was introduced into the classical ...
Yu PENG, Jinzhou ZHAO, Yongming LI
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Creep behaviour and constitutive model of coal filled with gas
International Journal of Mining Science and Technology, 2017 Coal exhibits different creep behaviours when filled with different amounts of gas. Creep tests of coal filled with 0 and 0.5 MPa gas were performed, and strain under different axial stress was compared.
Xiangchun Li +6 more
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Underground SpaceSince the classical element model cannot describe the nonlinear characteristics of rock during the entire compressive creep process, nonlinear elements and creep damage are generally introduced in the model to resolve this issue.
Tianbin Li +5 more
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The creep behavior of simple structures with a stress range-dependent constitutive model [PDF]
, 2012 High temperature design remains an issue for many components in a variety of industries. Although finite element analysis for creep is now an accessible tool, most analyses outside the research domain use long standing and very simple constitutive models
Boyle, James
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Metals, 2022 The tensile, creep, fatigue and creep-fatigue tests of the nickel-based superalloy GH4169 were carried out. According to the deformation characteristics of GH4169 alloy, the Ohno-Karim kinematic model (O-K model) can be used to describe the tensile ...
Xuteng Hu +4 more
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The viscoplastic constitutive model of TC4 alloy under high temperature
Xibei Gongye Daxue Xuebao, 2023 TC4 alloy is widely used in the high temperature environment. This paper proposed an ununified viscoplastic constitutive model according to the uniaxial creep experiment and high temperature tensile experiment of TC4 alloy.
HE Yuxin, MA Yu'e
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An elastic-viscoplastic creep model for describing creep behavior of layered rock
Frontiers in Materials, 2023 To describe the full-stage creep behavior of layered rock accurately, a new elastic-viscoplastic creep model is proposed based on fractional order theory in this manuscript, which consists of a Hooke elastomer, a fractional Abel dashpot, a Kelvin body ...
Yukun Li +3 more
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Preliminary analysing of experimental data for the development of high Cr Alloy Creep damage Constitutive Equations [PDF]
, 2012 This conference paper presents the current research of preliminary analysing of experimental data for the development of high Cr Alloy Creep damage Constitutive Equations (such as P91 alloy). Firstly, it briefly introduces the background of general creep
Xu, Qiang +3 more
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Applied Sciences, 2022 With the increase in engine power density, the temperature and stress carried by the cylinder head during operation also increase. The thermal engine fatigue life prediction of the cylinder head needs to consider accurate and reasonable creep ...
Guoxi Jing +5 more
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Determination of the material constants of creep damage constitutive equations using Matlab optimization procedure [PDF]
, 2015 Creep damage constitutive equations based in continuum damage mechanics are characterized by their complexity due to the coupled form of the multi-damage state variables over a wide range of stresses.
Xu, Qiang +3 more
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