Results 1 to 10 of about 35,481 (310)

Performance investigation of quasi-Newton-based parallel nonlinear FEM for large-deformation elastic-plastic analysis over 100 thousand degrees of freedom

Mechanical Engineering Journal, 2021
Quasi-Newton-based nonlinear finite element methods were extensively studied in the 1970s and 1980s. However, they have almost disappeared due to their poorer convergence performance than the Newton-Raphson method.
Yasunori YUSA, Shota MIYAUCHI, Hiroshi OKADA   +2 more
doaj   +1 more source

Analysis of Tunnel Deformation Using Elastoplastic Stillinger Weber (SW) Potential Embedded Discretized Virtual Internal Bond (DVIB) Method

Applied Sciences
Tunnel deformation induced by excavation in brittle and quasi-brittle rock masses involves complex interactions among stress redistribution, plastic deformation, and fracture evolution.
Dina Kon, Shu Jisen, Alphonse Kakanda, Dave Mbako   +3 more
doaj   +1 more source

Simulation of Lueders bands using regularized large strain elasto-plasticity

Archives of Mechanics, 2021
This paper deals with the numerical simulation of an instability phenomenon called Lueders bands with two regularized material models: viscoplasticity and gradient-enhanced plasticity.
M. Mucha, B. Wcisło, J. Pamin
doaj   +1 more source

The Impact of Elastoplastic Deformation Behavior on the Apparent Gas Permeability of Deep Fractal Shale Rocks

Fractal and Fractional
Deep shale gas reservoirs are vital sources of unconventional natural gas and present unique challenges for exploration and development due to their multiscale flow characteristics and elastoplastic deformation behavior of reservoir rocks.
Xu Zhou, Zhaoqin Huang, Aifen Li, Jun Yao, Xu Zhang   +4 more
doaj   +1 more source

ON MULTISCALE DAMAGE MODELLING OF HETEROGENEOUS MATERIALS USING NONLOCAL CONTINUUM THEORY

Brodogradnja, 2021
An overview of the modelling of quasi-brittle as well as ductile damage is given. The multiscale procedure employing the nonlocal continuum theory is described in more detail.
Jurica Sorić, Tomislav Lesičar, Filip Putar, Zdenko Tonković   +3 more
doaj   +1 more source

Closed form solution of the return mapping algorithm in elastoplasticity [PDF]

, 2017
In the present work a return mapping algorithm is discussed for small strain elastoplasticity boundary value problems with an exact closed form solution of the local constitutive equations.
De Angelis, Fabio, Taylor, Robert L.
core  

Equilibrium and stability of beams with elastoplastic semi-rigid joints [PDF]

Archives of Civil Engineering
The classical theory of beams admits two types of connections between structural elements: perfectly rigid and perfectly flexible. However, the engineering reality calls for a more general approach to joint modelling.
Grzegorz Dzierżanowski
doaj   +1 more source

An elastoplastic framework for granular materials becoming cohesive through mechanical densification. Part II - the formulation of elastoplastic coupling at large strain

, 2010
The two key phenomena occurring in the process of ceramic powder compaction are the progressive gain in cohesion and the increase of elastic stiffness, both related to the development of plastic deformation.
Alessandro Gajo, Andrea Piccolroaz, Bigoni, Bigoni, Bigoni, Borja, Callari, Davide Bigoni, Gajo, Hill, Hill, Hill, Hill, Hoger, Ibrahimbegovic, Itskov, Lee, Ogden, Ortiz, Peric, Petryk, Petryk, Rouainia, Sansour, Schieck, Simo, Simo, Truesdell, Willis   +28 more
core   +1 more source

Strain localization analysis using a multiscale model [PDF]

, 2007
In order to analyze the formability of steels in sheet metal forming, a ductility loss criterion is coupled with a multiscale model. The behavior at the mesoscopic (grain) scale is modeled by a large strain micromechanical constitutive law, which is then
ABED-MERAIM, Farid, BEN ZINEB, Tarak, BERVEILLER, Marcel, FRANZ, Gérald, LEMOINE, Xavier   +4 more
core   +8 more sources

Coupled numerical simulation of a tailings deposit by FEM

REM: International Engineering Journal
Researchers have found that a valuable alternative for predicting the mechanical behavior of landfill construction is numerical simulation based on the finite element method.
Ana Luiza Coelho Braga, Christianne de Lyra Nogueira   +1 more
doaj   +1 more source