Results 11 to 20 of about 1,100 (217)
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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Study on Creep Characteristics and Constitutive Relation of Fractured Rock Mass
Shock and Vibration, 2020 In order to effectively describe the whole creep process of fractured rock mass, triaxial unloading creep tests were carried out on prefractured coal samples using constant axial pressure and graded unloading confining pressure, and the axial and lateral
Maotong Li +4 more
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Creep–Fatigue Life Estimation of Gr.91 Steel and Its Welded Joints
Metals, 2023 A series of creep–fatigue tests of Gr.91 steel were performed at 600 °C. Fatigue life was reduced by tensile strain holding. The minimum life reduction factor was approximately 0.3.
Isamu Nonaka
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A Fractional Order Creep Damage Model for Microbially Improved Expansive Soils
Frontiers in Earth Science, 2022 Microbial Induced Calcite Precipitation method was used to improve the expansive soils of Nanning, Guangxi. The nonlinear shear creep behavior of microbially improved expansive soil was studied by triaxial consolidation drainage shear test.
Tian Xuwen +6 more
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Bone creep-fatigue damage accumulation
Journal of Biomechanics, 1989 Creep and fatigue tests were performed on human femoral cortical bone and the results were compared to a cumulative damage model for bone fracture. Fatigue tests in tension, compression, and reversed loading with a tensile mean stress were conducted at 2 Hz and 0.02 Hz.
W E, Caler, D R, Carter
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Shuiwen dizhi gongcheng dizhi, 2023 The creep characteristics of rock are closely related to the long-term stability of rock mass. With the excavation of deep buried tunnels in west China, in order to ensure the safety of engineering and the long-term stability of underground buildings, it
Xiao HE +8 more
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Viscoelastic-plastic damage creep model for rock
Yantu gongcheng xuebao, 2020 Based on the classical element model, the nonlinear element and the creep damage are introduced to solve the problem that the classical element model cannot describe the non-linear characteristics of rock during the whole compressive creep process ...
ZHANG Liang-liang , WANG Xiao-jian
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A Nonlinear Creep-damage Constitutive Model of Mudstone Based on the Fractional Calculus Theory [PDF]
Journal of Petroleum Science and Technology, 2017 During the flood development in an oil field, the creep characteristic of mudstone is one of the important factors causing casing damage. In this study, based on the theory of fractional order differential and taking into account the creep damage ...
Zhang Jun, Zeng Jia
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Pore structure evolution and damage creep model of shale subjected to freeze-thaw treatment
Journal of Materials Research and Technology, 2022 To solve the long-term instability problem of engineering project in the seasonal frozen region, we carried out the freeze-thaw (F-T) cycle experiments of shale under different F-T temperatures and numbers of cycles, nuclear magnetic resonance (NMR), and
Zhang-qing Xuan +5 more
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Effect of Time and Stress on Creep Damage Characteristics of Cement-Based Materials
BuildingsIn the realm of daily life, ensuring the safety of building structures and civil engineering projects remains a paramount research focus. The creep properties of materials significantly influence their long-term loading process.
Yifan Zhang +5 more
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