Results 101 to 110 of about 2,895,298 (310)

MODELLING OF THE PRESSURE AND DENSITY SENSITIVE BEHAVIOUR OF SAND WITHIN THE FRAMEWORK OF HYPOPLASTICITY

open access: yesTASK Quarterly, 2000
In this paper a hypoplastic model proposed by Gudchus and Bauer is presented which is apt to describe the mechanical behaviour of loose and dense sand within a wide range of pressures and densities using a single set of constants.
ERICH BAUER
doaj  

The Lagrange multipliers method in covariant formulations of micropolar continuum mechanics theories

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2018
Linear model of micropolar elastic continuum (known also as the Cosserat continuum) is considered. Kinematics and strain measures are discussed.
Yuri N Radayev
doaj   +1 more source

Characteristic Classes and Weyl Tensor: Applications to General Relativity [PDF]

open access: yesProceedings of the National Academy of Sciences, 1970
In a recent paper, Chern and Simons proved that the Pontrjagin forms of a Riemannian manifold remain invariant under a conformal deformation. We show that these forms can be expressed uniquely in terms of the conformal curvature tensor: this provides a new proof of their result.
openaire   +2 more sources

Arts et éducation relative à l’environnement : un maillage incontournable [PDF]

open access: yes, 2017
L’histoire fourmille d’exemples où le pouvoir mobilisateur et transformateur de l’art a servi différentes causes sociales, politiques, religieuses, voire commerciales.
Bouchard-Valentine, Vincent
core   +1 more source

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

open access: yesAdvanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi   +3 more
wiley   +1 more source

Source separation and localisation via tensor decomposition for distributed arrays

open access: yesThe Journal of Engineering, 2019
This study focuses on the problem of power spectra separation and localisation of multiple sources using distributed arrays. First, the array structure and signal model are discussed. By cross-correlating the multi-channel received signals in time-domain,
Yuanbing Cheng, Yapeng He
doaj   +1 more source

Remarks on the Relative Tensor Degree of Finite Groups

open access: yes, 2014
The present paper is a note on the relative tensor degree of finite groups. This notion generalizes the tensor degree, introduced recently in literature, and allows us to adapt the concept of relative commu-tativity degree through the notion of ...
A. M. A. Alghamdi, F. G. Russo
core  

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev   +2 more
wiley   +1 more source

An efficient Q-tensor-based algorithm for liquid crystal alignment away from defects

open access: yes, 2010
We develop a fast and accurate approximation of the normally stiff equations which minimize the Landau–de Gennes free energy of a nematic liquid crystal. The resulting equations are suitable for all configurations in which defects are not present, making
M. Kaczmarek   +5 more
core   +1 more source

On the convergence of the combination technique [PDF]

open access: yes, 2013
Sparse tensor product spaces provide an efficient tool todiscretize higher dimensional operator equations. The direct Galerkin method in such ansatz spaces may employ hierarchical bases, interpolets, wavelets or multilevel frames. Besides, an alternative
Griebel, Michael   +3 more
core   +1 more source

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