Results 41 to 50 of about 8,196 (223)
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Drilling fluids used in high‐performance well operations often struggle to maintain rheological stability, colloidal dispersion, and filtration control under harsh downhole conditions. This study engineered a multifunctional Fe3O4@Saponin/Cu(II) nanocomposite to address these challenges.
Kassem Al Attabi +9 more
wiley +1 more source
Thermo-micro-mechanical simulation of bulk metal forming processes
, 2019 The newly proposed microstructural constitutive model for polycrystal viscoplasticity in cold and warm regimes (Motaman and Prahl, 2019), is implemented as a microstructural solver via user-defined material subroutine in a finite element (FE) software ...
Haase, Christian +3 more
core +1 more source
The Canadian Journal of Chemical Engineering, EarlyView.Abstract Accurately simulating multiphase flows at low capillary numbers remains challenging due to spurious currents and interface discretization errors. We present a systematic comparison of four volume‐of‐fluid (VOF) solvers within the OpenFOAM framework for pressure‐driven Poiseuille–Bingham flow over grooved surfaces: interFoam with classical ...
Amir Joulaei +2 more
wiley +1 more source
Plastic strain of the bimetal tube subjected to inner pressure [PDF]
Известия Саратовского университета. Новая серия: Математика. Механика. ИнформатикаThe problem of deformation of a two-layer (bimetallic) thick tube under inner pressure is considered. A dependence of critical load from physical and geometrical properties of the product at which plastic flow is occurred at the beginning of either inner
Firsov, Sergey Viktorovich
doaj +1 more source
Combined creep and plastic analysis with numerical methods [PDF]
, 2013 The combination of plastic and creep analysis formulation are developed in this paper. The boundary element method and the finite element method are applied in plates in order to do the numerical analysis.
Kryvko, A. +2 more
core
, 2014 We develop a model for sheared gouge layers that accounts for the local increase in temperature at the grain contacts during sliding. We use the shear transformation zone (STZ) theory, a statistical thermodynamic theory, to describe irreversible ...
Carlson, Jean M., Elbanna, Ahmed E.
core +1 more source
Creep properties and constitutive model of diabase in deep water conveyance tunnels
Deep Underground Science and Engineering, EarlyView.The axial and lateral creep characteristics of diabase were analyzed based on compression creep tests. The nonlinear viscoelastic‐plastic model capable of describing the whole creep process was established based on the fractional derivative and damage theories.
Zhigang Tao +5 more
wiley +1 more source
Analysis of an improved Nishihara creep model considering plastic strain accumulation
Frontiers in Materials, 2023 Rock-engineering structures, particularly subway excavation rock-engineering structures, are subjected to the long-term effects of external loading that may gradually damage and cause creep and severe plastic deformations or even progressive failure. The
Yang Cheng, Liangliang Zhang
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu +4 more
wiley +1 more source
Bayesian parameter identification in plasticity [PDF]
, 2017 To evaluate the cyclic behaviour under different loading conditions using the kinematic and isotropic hardening theory of steel a Chaboche visco-plastic material model is employed.
Adeli, Ehsan +3 more
core