Recent progress in adaptive multiscale molecular dynamics simulations of soft matter

SO Nielsen, RE Bulo, PB Moore… - Physical Chemistry …, 2010‏ - pubs.rsc.org
Understanding mesoscopic phenomena in terms of the fundamental motions of atoms and
electrons poses a severe challenge for molecular simulation. This challenge is being met by …

A multiscale multi-permeability poroplasticity model linked by recursive homogenizations and deep learning

K Wang, WC Sun - Computer Methods in Applied Mechanics and …, 2018‏ - Elsevier
Many geological materials, such as shale, mudstone, carbonate rock, limestone and rock
salt are multi-porosity porous media in which pores of different scales may co-exist in the …

[PDF][PDF] Advances in discrete element method applied to soil, rock and concrete mechanics

FV Donzé, V Richefeu, SA Magnier - Electronic Journal of …, 2009‏ - academia.edu
ABSTRACT The use of Discrete Element Methods (DEM) to investigate mechanical
properties of geomaterials is growing fast and their applications in geotechnics have …

Ghosts and machines: regularized variational methods for interactive simulations of multibodies with dry frictional contacts

C Lacoursiere - 2007‏ - diva-portal.org
A time-discrete formulation of the variational principle of mechanics is used to provide a
consistent theoretical framework for the construction and analysis of low order integration …

Discrete geometric optimal control on Lie groups

MB Kobilarov, JE Marsden - IEEE Transactions on Robotics, 2011‏ - ieeexplore.ieee.org
We consider the optimal control of mechanical systems on Lie groups and develop
numerical methods that exploit the structure of the state space and preserve the system …

Review of the exponential and Cayley map on SE (3) as relevant for Lie group integration of the generalized Poisson equation and flexible multibody systems

A Müller - Proceedings of The Royal Society A, 2021‏ - royalsocietypublishing.org
The exponential and Cayley maps on SE (3) are the prevailing coordinate maps used in Lie
group integration schemes for rigid body and flexible body systems. Such geometric …

Screw and Lie group theory in multibody dynamics: recursive algorithms and equations of motion of tree-topology systems

A Müller - Multibody System Dynamics, 2018‏ - Springer
Screw and Lie group theory allows for user-friendly modeling of multibody systems (MBS),
and at the same they give rise to computationally efficient recursive algorithms. The inherent …

Integrating rotations using nonunit quaternions

C Rucker - IEEE Robotics and Automation Letters, 2018‏ - ieeexplore.ieee.org
In this letter, we propose and demonstrate a method for integration of rotations using nonunit
quaternions. Unit quaternions are commonly used to represent rotation, in which case the …

Geometric methods and formulations in computational multibody system dynamics

A Müller, Z Terze - Acta mechanica, 2016‏ - Springer
Multibody systems are dynamical systems characterized by intrinsic symmetries and
invariants. Geometric mechanics deals with the mathematical modeling of such systems and …

A comparative study of finite element and spectral element methods in seismic wavefield modeling

Y Liu, J Teng, H Lan, X Si, X Ma - Geophysics, 2014‏ - library.seg.org
The computational accuracy and efficiency of finite element method and spectral element
method (SEM) are investigated thoroughly in time-domain elastic wavefield modeling. The …