Results 81 to 90 of about 1,486,164 (204)

Modeling anisotropic damage in elasto-plastic materials with structural defects [PDF]

, 2013
The paper deals with models for elasto-plastic materials with continuously distributed micro defects (micro cracks, micro voids, extra-matte), compatible with the principle of imbalance of the free energy.
Cleja-Tigoui, Sanda, Tigoui, Victor
core  

Multi-Instantons and Exact Results II: Specific Cases, Higher-Order Effects, and Numerical Calculations

, 2004
In this second part of the treatment of instantons in quantum mechanics, the focus is on specific calculations related to a number of quantum mechanical potentials with degenerate minima.
Andrianov, Bailey, Brézin, Brézin, Buslaev, Damburg, Herbst, Itzykson, Jean Zinn-Justin, Jentschura, Jentschura, Jentschura, Lipatov, Lipatov, Lipatov, Press, Richardson, Seznec, Shifman, Ulrich D. Jentschura, Wichmann, Wolfram, Zinn-Justin, Zinn-Justin   +23 more
core   +1 more source

Quantum versus Classical Dynamics in a driven barrier: the role of kinematic effects

, 2012
We study the dynamics of the classical and quantum mechanical scattering of a wave packet from an oscillating barrier. Our main focus is on the dependence of the transmission coefficient on the initial energy of the wave packet for a wide range of ...
E. Katifori, E. Mavrommatis, F. K. Diakonos, K. Husimi, P. K. Papachristou, S. E. Koonin, T. Dittrich, V. Constantoudis   +7 more
core   +1 more source

Photothermal Conversion Characteristics of Silver Nanoparticle Dispersions [PDF]

, 2014
This paper was presented at the 4th Micro and Nano Flows Conference (MNF2014), which was held at University College, London, UK. The conference was organised by Brunel University and supported by the Italian Union of Thermofluiddynamics, IPEM, the ...
4th Micro and Nano Flows Conference (MNF2014), Chen, HJ, Lin, G, Wen, D, Zhang, H   +4 more
core  

An optimization technique based on mechanical specific energy concept to improve drilling efficiency: a case study

Записки Горного института
For years attempts have been made in the drilling industry to increase the drilling efficiency and decrease the associated costs. The drilling efficiency can be evaluated by comparing applied energy, i.e., mechanical specific energy, with rock strength ...
Sajjad Khoshro, Seyyed Shahab Tabatabaee Moradi   +1 more
doaj  

Mechanical limits of viral capsids

, 2007
We study the elastic properties and mechanical stability of viral capsids under external force-loading with computer simulations. Our approach allows the implementation of specific geometries corresponding to specific phages such as $\phi$29 and CCMV. We
DiDonna, Dubois, Helgstrand, Klug, Kumar, M. Buenemann, Olson, P. Lenz, QUINTERO GARCIA, Riemer, Seung, Smith, Tao, Xiao   +13 more
core   +2 more sources

Mechanical specific energy versus depth of cut in rock cutting and drilling

International Journal of Rock Mechanics and Mining Sciences, 2017
Abstract The relationship between Mechanical Specific Energy (MSE) and the Rate of Penetration (ROP), or equivalently the depth of cut per revolution, provides an important measure for strategizing a drilling operation. This study explores how MSE evolves with depth of cut, and presents a concerted effort that encompasses analytical, computational ...
Yaneng Zhou, Wu Zhang, Isaac Gamwo, Jeen-Shang Lin   +3 more
openaire   +2 more sources

Numerical Simulation on Rock-breaking and Temperature Characteristics of Sawtooth PDC Cutter

Shiyou jixie
Most of the researches on bionic teeth focus on the wave tooth shape, and there are few reports on the rock-breaking properties of sawtooth cutters.Based on plasto elasticity and Drucker-Prager rock failure criteria, a finite element model of interaction
Wu Zebing, Yuan Ruofei, Zhang Wenxi, He Xiaolin, Liu Jiale   +4 more
doaj  

Entropy-Preserving Coupling Conditions for One-dimensional Euler Systems at Junctions

, 2018
This paper is concerned with a set of novel coupling conditions for the $3\times 3$ one-dimensional Euler system with source terms at a junction of pipes with possibly different cross-sectional areas.
Lang, Jens, Mindt, Pascal
core   +1 more source

The Importance of Molecular Structure for Textural and Physicochemical Properties of Extruded Wheat Flour

Foods
This study elucidated the mechanistic interplay between the extrusion parameters (temperature and screw speed), starch molecular architecture (chain-length distribution), and key physicochemical properties of wheat flour extrudates.
Yuan Chai, Ruibin Wang, Bo Zhang, Yonglu Tang, Chaosu Li, Boli Guo, Ming Li   +6 more
doaj   +1 more source