Results 71 to 80 of about 361,375 (298)

Study of the Dependence Between the Belts Width and the Loading Method of Granular Materials in the Case of Conveyors Belt

Scientific Bulletin of Valahia University: Materials and Mechanics
In this study we will focus on the problems that arise due to the high travel speeds that the piston of a hydraulic motor develops during operation. These speeds lead to an increase in the value of the kinetic friction coefficient.
Despa Veronica, Vlădescu Mircea
doaj   +1 more source

Non-Dissipative Structural Evolutions in Granular Materials

EPJ Web of Conferences, 2017
The structure of the contact network in granular assemblies can evolve due to either dissipative mechanisms such as sliding at contact points, or non-dissipative mechanisms through the phenomenon of contact gain and loss. Being associated with negligible
Pouragha Mehdi, Wan Richard
doaj   +1 more source

Photoelastic force measurements in granular materials

, 2016
Photoelastic techniques are used to make both qualitative and quantitative measurements of the forces within idealized granular materials. The method is based on placing a birefringent granular material between a pair of polarizing filters, so that each ...
Frocht M., Hecht E., James G. Puckett, Jonathan E. Kollmer, Karen E. Daniels, Shattuck M. D., Timoshenko S., Utter B.   +7 more
core   +1 more source

Shear Flows of Rapidly Flowing Granular Materials [PDF]

, 1987
Shear flows of granular materials are studied in an open channel. The wall shear is calculated from an open channel momentum equation which includes the density variations in the flow.
Brennen, C. E., Patton, J. S., Sabersky, R. H.   +2 more
core   +1 more source

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Diffusion as mixing mechanism in granular materials

, 2000
We present several numerical results on granular mixtures. In particular, we examine the efficiency of diffusion as a mixing mechanism in these systems. The collisions are inelastic and to compensate the energy loss, we thermalize the grains by adding a ...
A.M. Scott, B.Ö. Anarson, C. Henrique, C.S. Cambell, D. Bideau, E. Guyon, G. Batrouni, G.H. Rosato, I. Ippolito, J. Duran, J. Lemaitre, J. Talbot, J.B. Knight, J.T. Jenkins, L. Verlet, L.T. Fan, M.Y. Louge, P.M.C. Lacey, R. Julien, S.B. Savage, T.P.C. Van Noije, Y. Limon Duparcmeur   +21 more
core   +1 more source

Mechanisms for slow strengthening in granular materials [PDF]

, 1999
Several mechanisms cause a granular material to strengthen over time at low applied stress. The strength is determined from the maximum frictional force F_max experienced by a shearing plate in contact with wet or dry granular material after the layer ...
A. Ruina, A.J. Liu, C. Marone, C. Marone, C. Scholz, C.H. Liu, D. Howell, D.M. Hanes, E. Aharonov, F. Radjai, G. Hähner, H.M. Jaeger, J. Krim, J. P. Gollub, J.-C. Géminard, J.C. Géminard, J.H. Dieterich, J.K. Morgan, J.K. Morgan, L. Bocquet, L. Vanel, M. Nakatani, M.E. Cates, O. Reynolds, P. Berthoud, P.A. Thompson, S. Nasuno, S. Nasuno, S. Nasuno, S.F. Edwards, S.L. Karner, T. Baumberger, W. Losert, Y. Zhang   +33 more
core   +2 more sources

Vibrational dynamics of confined granular materials [PDF]

Physical Review E, 2006
By means of two-dimensional contact dynamics simulations, we analyze the vibrational dynamics of a confined granular layer in response to harmonic forcing. We use irregular polygonal grains allowing for strong variability of solid fraction. The system involves a jammed state separating passive (loading) and active (unloading) states.
Azéma, Emilien, Radjai, Farhang, Peyroux, Robert, Dubois, Frédéric, Saussine, Gilles   +4 more
openaire   +5 more sources

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source

New shakedown criterion and permanent deformation properties of unbound granular materials

Journal of Modern Transportation, 2019
Unbound granular material specifications for road pavements in Australia are primarily based on physical material specification rather than mechanical characterisation.
Ali Alnedawi, Kali Prasad Nepal, Riyadh Al-Ameri   +2 more
doaj   +1 more source