Results 31 to 40 of about 932,059 (284)

Calibration of Micromechanical Parameters for the Discrete Element Simulation of a Masonry Arch using Artificial Intelligence

Infrastructures, 2023
This study focuses on an old but still unresolved problem of automatically calibrating the constitutive parameters of discrete element models. Instead of the troublesome and time-consuming manual trial-and-error method, which is typical today, the ...
Ghulam Kibriya, Ákos Orosz, János Botzheim, Katalin Bagi   +3 more
doaj   +1 more source

Boundary element method based on preliminary discretization [PDF]

Mathematical Models and Computer Simulations, 2014
The final publication is available at Springer via http://dx.doi.org/10.1134/S2070048214020082 A new numerical method for solving wave diffraction problems is given. The method is based on the concept of boundary elements; i.e., the unknown values are the field values on the surface of the scatterer. An analog of a boundary element method rather than a
Poblet-Puig, Jordi, Valyaev, Valery, Shanin, Andrey   +2 more
openaire   +4 more sources

Discrete Element Analysis of Grouting Reinforcement and Slurry Diffusion in Overburden Strata

Applied Sciences
Research on the grouting reinforcement mechanism of overburden is constrained by the concealed and heterogeneous nature of geotechnical media, posing dual challenges in theoretical analysis and process visualization.
Pengfei Guo, Weiquan Zhao, Yahui Ma, Huiling Gen   +3 more
doaj   +1 more source

Convergence and Optimality of Adaptive Mixed Finite Element Methods

, 2009
The convergence and optimality of adaptive mixed finite element methods for the Poisson equation are established in this paper. The main difficulty for mixed finite element methods is the lack of minimization principle and thus the failure of ...
Chen, Long, Holst, Michael, Xu, Jinchao
core   +2 more sources

Quasi-optimal nonconforming methods for symmetric elliptic problems. I -- Abstract theory [PDF]

, 2017
We consider nonconforming methods for symmetric elliptic problems and characterize their quasi-optimality in terms of suitable notions of stability and consistency.
Veeser, Andreas, Zanotti, Pietro
core   +2 more sources

Hybrid Finite-Discrete Element Modelling of Excavation Damaged Zone Formation Process Induced by Blasts in a Deep Tunnel

Advances in Civil Engineering, 2020
A brief literature review of numerical studies on excavation damage zone (EDZ) is conducted to compare the main numerical methods on EDZ studies. A hybrid finite-discrete element method is then proposed to model the EDZ induced by blasts.
Huaming An, Hongyuan Liu, Haoyu Han
doaj   +1 more source

Dynamic mesh refinement for discrete models of jet electro-hydrodynamics

, 2016
Nowadays, several models of unidimensional fluid jets exploit discrete element methods. In some cases, as for models aiming at describing the electrospinning nanofabrication process of polymer fibers, discrete element methods suffer a non constant ...
Akima, Apostolou, Barnes, Carroll, Carroll, Carroll, Coluzza, de Boor, Dorr, Feng, Greengard, Kowalewski, Kowalewski, Lauricella, Lauricella, Lauricella, Lauricella, Li, Luo, Montinaro, Persano, Pisignano, Pontrelli, Ramakrishna, Reneker, Reneker, Reneker, Thompson, Weinan, Wendorff, Wijshoff, Yang, Yarin   +32 more
core   +1 more source

Experimental Methods for Model Parameters in the Discrete Element Method

KONA Powder and Particle Journal
The Discrete Element Method (DEM) is a widely used numerical method for studying, analyzing, and optimizing particulate processes. Based on contact models, DEM can predict the interactions of particles and particles with wall surfaces.
Fabian Krull, David Strohner, Sergiy Antonyuk   +2 more
doaj   +1 more source

‘They Need to Hear You Say It’: Healthcare Professionals’ Perspectives on Barriers and Enablers to End‐of‐Life Discussions With Adolescents and Young Adults With Cancer

Pediatric Blood &Cancer, EarlyView.
ABSTRACT End‐of‐life conversations with adolescents and young adults (AYAs) with cancer rarely occur without the guidance of healthcare professionals. As a part of the ‘Difficult Discussions’ study, focused on palliative care and advance care planning discussions with AYAs with cancer, we investigated the factors that healthcare professionals identify ...
Justine Lee, Holly Evans, Claire E. Wakefield, Antoinette Anazodo, Richard J. Cohn, Brittany C. McGill, Elizabeth A. Lobb, Lori Wiener, Madeleine L. Juhrmann, Ursula M. Sansom‐Daly   +9 more
wiley   +1 more source

Slope Failure of Noncohesive Media Modelled with the Combined Finite–Discrete Element Method

Applied Sciences, 2019
Slope failure behaviour of noncohesive media with the consideration of gravity and ground excitations is examined using the two-dimensional combined finite⁻discrete element method (FDEM).
Xudong Chen, Hongfan Wang
doaj   +1 more source