Results 31 to 40 of about 738 (114)

Fluid boundary of a viscoplastic Bingham flow for finite solid deformations [PDF]

, 2010
The modelling of viscoplastic Bingham fluids often relies on a rheological constitutive law based on a "plastic rule function" often identical to the yield criterion of the solid state. It is also often assumed that this plastic rule function vanishes at
Lacaze, Laurent, Thual, Olivier
core   +4 more sources

Numerical Investigation Into Mechanical Behavior of Metastable Olivine During Phase Transformation: Implications for Deep‐Focus Earthquakes

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 2, February 2025.
Abstract One hypothesized mechanism that triggers deep‐focus earthquakes in oceanic subducting slabs below ∼300 km depth is transformational faulting due to the olivine‐to‐spinel phase transition. This study uses finite element modeling to investigate phase transformation‐induced stress redistribution and material weakening in olivine.
S. Sindhusuta, Sheng‐Wei Chi, Craig Foster, Timothy Officer, Yanbin Wang   +4 more
wiley   +1 more source

A depth‐integrated SPH framework for slow landslides

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 48, Issue 16, Page 3848-3875, November 2024.
Abstract Slow and very slow landslides can cause severe economic damage to structures. Due to their velocity of propagation, it is possible to take action such as programmed maintenance or evacuation of affected zones. Modeling is an important tool that allows scientists, engineers, and geologists to better understand their causes and predict their ...
Manuel Pastor, Andrei Hernández, Saeid M. Tayyebi, Gustavo A. Trejos, Ginés Suárez, Junwei Zheng   +5 more
wiley   +1 more source

Granular material regime transitions during high energy impacts of dry flowing masses: MPM simulations with a multi‐regime constitutive model

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 48, Issue 15, Page 3699-3724, 25 October 2024.
Abstract The dynamic interaction between granular flowing masses and rigid obstacles is a complex phenomenon characterised by both large displacements and high strain rates. In case the flowing mass is modelled as a continuum, its numerical simulation requires both advanced computational tools and constitutive relationships capable of predicting the ...
Pietro Marveggio, Matteo Zerbi, Irene Redaelli, Claudio di Prisco   +3 more
wiley   +1 more source

A Comparative Study of Vibrations of Elasto-Viscoplastic Shells and Plates

Engineering Transactions, 1995
A method of solution of the problem of nonlinear vibrations of elasto-viscoplastic plates and shells is presented, based on the first order shear deformation-moderate rotation theory of the laminated shells. Viscoplastic material behaviour is taken into
P. Kłosowski, K. Woźnica, D. Weichert
doaj  

Numerical modeling of strain rate hardening effects on viscoplastic behavior of metallic materials [PDF]

, 2017
The main goal of the present work is to provide a finite strain elasticviscoplastic framework to numerically account for strain, strain rate hardening, and viscous effects in cold deformation of metallic materials. The aim is to provide a simple and robust
Dos Santos, Tiago, Maghous, Samir, Rosa, Pedro A. R., Rossi, Rodrigo   +3 more
core  

Fundamental structure of steady plastic shock waves in metals [PDF]

, 2004
The propagation of steady plane shock waves in metallic materials is considered. Following the constitutive framework adopted by R. J. Clifton [Shock Waves and the Mechanical Properties of Solids, edited by J. J. Burke and V.
Molinari, A., Ravichandran, G.
core   +1 more source

m‐AGC tangent visco‐plastic operator with hardening/softening, and application to the visco‐plastic relaxation analysis of stable and unstable problems using fracture‐based geomechanical interfaces

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 48, Issue 11, Page 2762-2789, 10 August 2024.
Abstract A previous perfect visco‐plastic constitutive formulation of the Perzyna type incorporating the concepts of prescribed stress increments and m‐AGC tangent operator (m‐Assumed algorithmic generalized compliance tangent operator) is extended to the case of Hardening/Softening (H/S).
Irene Jaqués, Ignacio Carol
wiley   +1 more source

Mixed Finite Element Solution of Quasi-Static Problems of Viscoplastic Plates

Engineering Transactions, 1980
The paper is concerned with the numerical analysis of rigid, viscoplastic and elastic viscoplastic plates subjected to static loading. The small deflection theory of thin plates is employed.
M.J. Mikkola, K. Saloviin
doaj  

On the Interplay Between Distributed Bulk Plasticity and Local Fault Slip in Evolving Fault Zone Complexity

Geophysical Research Letters, Volume 51, Issue 14, 28 July 2024.
Abstract We numerically investigate the role of plastic strain accumulation on the mechanical response of a planar strike‐slip fault. Our models show that fault‐zone strength significantly impacts the ensuing sequence of earthquakes. Weaker fault zones accumulating more plastic strain promote more complexity in the seismicity pattern through aperiodic ...
Mohamed Abdelmeguid, Md Shumon Mia, Ahmed Elbanna   +2 more
wiley   +1 more source