Results 51 to 60 of about 75,364 (297)

Angle of repose revisited: When is a heap a cone?

EPJ Web of Conferences, 2017
The angle of repose is a frequently reported value in bulk solids characterisation and its popularity is based on the simple measurement setup. It can be useful to estimate the flowability of a bulk material or to estimate the inner friction coeffcient ...
Rackl Michael, Grötsch Florian E., Günthner Willibald A.   +2 more
doaj   +1 more source

Granular flow down a rough inclined plane: transition between thin and thick piles

, 2002
The rheology of granular particles in an inclined plane geometry is studied using molecular dynamics simulations. The flow--no-flow boundary is determined for piles of varying heights over a range of inclination angles $\theta$.
Aguirre M. A., Aguirre M. A., Ahn H., Ancey C., Ancey C., Andreotti B., Aradian A., Aranson I. S., Bagnold R. A., Bocquet L., Cundall P. A., Daerr A., Daerr A., Ertaş D., Gary S. Grest, Hanes D. M., James W. Landry, Lemieux P.-A., Leonardo E. Silbert, Louge M. Y., Mehta A., Mills P., Nerone N., Pouliquen O., Pöschel T., Sadjadpour M., Silbert L. E., Silbert L. E., Silbert L. E., Silbert L. E., Silva M. D., Walton O. R., Zheng X. M., Zhou Y. C.   +33 more
core   +1 more source

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source

Calibration of Contact Parameters for Moist Bulk of Shotcrete Based on EDEM

Advances in Materials Science and Engineering, 2022
To obtain the contact parameters of the moist bulk of shotcrete accurately and quickly, this study calibrated the contact parameters of the moist bulk of shotcrete by physical stacking test and simulation method.
Guanguo Ma, Zhenjiao Sun, Hui Ma, Pengcheng Li   +3 more
doaj   +1 more source

Vortex microavalanches in superconducting Pb thin films

, 2003
Local magnetization measurements on 100 nm type-II superconducting Pb thin films show that flux penetration changes qualitatively with temperature. Small flux jumps at the lowest temperatures gradually increase in size, then disappear near T = 0.7Tc ...
A. M Campbell, B.U. Runge, C. Heiden, C.A. Duran, C.P. Bean, E.R. Nowak, F.L. Barkov, G.T. Seidler, H. A. Radovan, H. Kirchner, I. Aranson, K. Behnia, P. Leiderer, R. J. Zieve, R.A. Richardson, R.J. Zieve, S. Field, S.S. James, S.T. Stoddart, T.H. Johansen, T.H. Johansen, W. Barford, Z.W. Zhao   +22 more
core   +1 more source

Transfer of Energy and Momentum Between Magnetoactive Surface Microstructure and a Solid Object

Advanced Engineering Materials, EarlyView.
We demonstrate that magnetoactive multilamellar arrays subjected to a rotating magnetic field can function as platforms for controlled transport of physical objects. Through systematic experimental investigation, we elucidate the underlying physical mechanisms determining the upper limit of the achievable transportation speed in such magnetic “conveyor‐
Arne Geldof, Jan Kopačin, Izidor Straus, Raphael Kriegl, Gaia Kravanja, Luka Hribar, Matija Jezeršek, Mikhail Shamonin, Gašper Kokot, Irena Drevenšek‐Olenik   +9 more
wiley   +1 more source

A two-species continuum model for aeolian sand ripples [PDF]

, 1999
We formulate a continuum model for aeolian sand ripples consisting of two species of grains: a lower layer of relatively immobile clusters, with an upper layer of highly mobile grains moving on top.
A. Mehta, A. Mehta, A. Mehta, A. Mehta, Anita Mehta, H. M. Jaeger, H. M. Jaeger, H. Nishimori, H. Nishimori, H. Nishimori, J. Ungar, K. Pye, L. Prigozhin, N. B. Ouchi, P. Biswas, R. A. Bagnold, R. B. Hoyle, R. E. Hunter, R. Greeley, R. P. Sharp, R. S. Anderson, R. S. Anderson, R. S. Anderson, R. S. Anderson, Rebecca B. Hoyle, S. B. Forrest, S. F. Edwards, S. K. Lele, S. Mitha, W. Landry   +29 more
core   +2 more sources

Bimetallic (NiFe) and Trimetallic (NiFeCr) Nanoalloys from Metal Oxides Using a Microwave Hydrogen Plasma

Advanced Engineering Materials, EarlyView.
Bimetallic (NiFe) and trimetallic (NiFeCr) nanoalloys (NAs) are synthesized using corresponding oxide mixtures using microwave hydrogen plasma within a few milliseconds. The process simultaneously 1) reduces metal oxides to metals; 2) downsizes the particles from micrometers to nanometers; and 3) blends the metals to form NAs.
Sachin Kumar, Mohammad Kazemi, Zichang Xiong, Thomas Cameron, Julian Held, Uwe Kortshagen   +5 more
wiley   +1 more source

Discrete Element Model of Oil Peony Seeds and the Calibration of Its Parameters

Agriculture
Oil peony is an important oil crop that is primarily sown by using artificial methods at present. Its seeder encounters the problems of low efficiency of seeding that significantly limits the highly efficient mechanized production of high-quality peony ...
Hao Zhou, Kangtai Li, Zhiyu Qin, Shengsheng Wang, Xuezhen Wang, Fengyun Sun   +5 more
doaj   +1 more source

Competition and cooperation:aspects of dynamics in sandpiles

, 2005
In this article, we review some of our approaches to granular dynamics, now well known to consist of both fast and slow relaxational processes. In the first case, grains typically compete with each other, while in the second, they cooperate.
Anita Mehta, Bagnold R A, Berg J, Bernal J D, Bollobas B, Brown R L, Caballero G, Coniglio A, Doi M, Edwards S F, Edwards S F, Edwards S F, Fukushima E, G C Barker, J M Berg, J M Luck, Kurchan J, Liu C H, Luck J M, Luck J M, Luck J M, Luck J M Mehta A, Marinari E, Mehta A, Mehta A, Mehta A, Mehta A, Mehta A, Mehta A, Mézard M, Reynolds O, Smoluchowski M V   +31 more
core   +1 more source