Results 71 to 80 of about 81,279 (338)

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

3D‐Printed Serial Snap‐Through Architectures for Programmable Mechanical Response

Advanced Engineering Materials, EarlyView.
A serial snap‐through architecture is realized using compact 3D‐printed von Mises truss units arranged in a staged cascade. Their geometry and boundary conditions program multistage mechanical responses with plateaux and re‐hardening regimes. An inverted‐compliance model predicts these behaviors and enables analytical design of programmable force ...
Filipe A. Santos
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

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

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

Advanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai, Md Shakhawath Hossain, Nhat Minh Nguyen, Yongliang Chen, Chaohao Chen, Xiaoxue Xu, Quang Thang Trinh, Toan Dinh, Toan Trong Tran   +8 more
wiley   +1 more source

Virtual parameter calibration of pod pepper seeds based on discrete element simulation

Heliyon
In order to achieve numerical optimization of the pod pepper seed sowing device, the contact parameters of pod pepper seeds were calibrated, with the angle of repose used as the response value.
Xingye Chen, Xinzhong Wang, Jing Bai, Weiquan Fang, Tianyu Hong, Nan Zang, Gaoliang Wang   +6 more
doaj   +1 more source

Nonequilibrium Phase Transitions in a Driven Sandpile Model [PDF]

, 1994
We construct a driven sandpile slope model and study it by numerical simulations in one dimension. The model is specified by a threshold slope $\sigma_c\/$, a parameter $\alpha\/$, governing the local current-slope relation (beyond threshold), and $j_ ...
Dhar S K, Ligget T M, R Pandit, S K Dhar, S Ramaswamy, Schmittmann B   +5 more
core   +2 more sources

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 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