Zobrazeno 1 - 10
of 130
pro vyhledávání: '"Nicholas Sitar"'
Autor:
Peng Tan, Nicholas Sitar
Publikováno v:
PEER Reports.
We present a systematic investigation of computational approaches to the modeling of granular materials. Granular materials are ubiquitous in everyday life and in a variety of engineering and industrial applications. Despite the apparent simplicity o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a7c345a5658df9ff6d2dc0509931b74
https://doi.org/10.55461/kmiz5819
https://doi.org/10.55461/kmiz5819
Autor:
Nathaniel Wagner, Nicholas Sitar
Publikováno v:
Geo-Congress 2022.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8aa0b48f732d250e3ae859cd06aa1fea
https://doi.org/10.1061/9780784484029.045
https://doi.org/10.1061/9780784484029.045
Publikováno v:
Granular matter, vol 24, iss 1
Granular Matter
Granular Matter
The orientation of, and contacts between, grains of sand reflect the processes that deposit the sands. Grain orientation and contact geometry also influence mechanical properties. Quantifying and understanding sand microstructure thus provide an oppo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5dc4171449a3562e4cb49e0f7ad07bd6
https://escholarship.org/uc/item/40f340gg
https://escholarship.org/uc/item/40f340gg
Autor:
Michael Gardner, Nicholas Sitar
Publikováno v:
International Journal for Numerical and Analytical Methods in Geomechanics, vol 43, iss 14
Author(s): Gardner, M; Sitar, N | Abstract: Interaction between solid particles and fluid is of fundamental interest to scientists and engineers in many different applications—cardiopulmonary flows, aircraft and automobile aerodynamics, and wind lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66130f9ff1f3fe2cceab6759e25696c6
https://doi.org/10.1002/nag.2972
https://doi.org/10.1002/nag.2972
Autor:
Nicholas Sitar, Michael Gardner
Publikováno v:
Rock Mechanics and Rock Engineering, vol 52, iss 12
Scour of rock is a challenging and interesting problem that combines rock mechanics and hydraulics of turbulent flow. On a practical level, rock erosion is a critical issue facing many of the world’s dams at which excessive scour of the dam foundat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2360a26d9dc60b66bfe04d4a7f4f86d5
https://escholarship.org/uc/item/30w3m555
https://escholarship.org/uc/item/30w3m555
Publikováno v:
Zheng, F; Jiao, YY; & Sitar, N. (2018). Generalized contact model for polyhedra in three-dimensional discontinuous deformation analysis. International Journal for Numerical and Analytical Methods in Geomechanics, 42(13), 1471-1492. doi: 10.1002/nag.2798. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/3pc3n3g9
International Journal for Numerical and Analytical Methods in Geomechanics, vol 42, iss 13
International Journal for Numerical and Analytical Methods in Geomechanics, vol 42, iss 13
Author(s): Zheng, F; Jiao, YY; Sitar, N | Abstract: We present a generalized contact computation model for arbitrarily shaped polyhedra to simplify the contact analysis in discontinuous deformation analysis. A list of generalized contact constraints
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc36a177fda29c5f24ecfb722c5360a5
https://doi.org/10.1002/nag.2798
https://doi.org/10.1002/nag.2798
Autor:
Xuguo Shi, Robert E. Kayen, Xudong Wang, Houjun Jiang, Lu Zhang, Nicholas Sitar, Shengwen Qi, Xie Hu
Publikováno v:
Remote Sensing of Environment. 265:112664
Landslides are common geohazards associated with natural drivers such as precipitation, land degradation, toe erosion by rivers and wave attack, and ground shaking. On the other hand, human alterations such as inundation by water impoundment or rapid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1c9bd210a5518096ba7b29916cd7dea
https://doi.org/10.1016/j.rse.2021.112664
https://doi.org/10.1016/j.rse.2021.112664
Publikováno v:
Gardner, M; Kolb, J; & Sitar, N. (2017). Parallel and scalable block system generation. Computers and Geotechnics, 89, 168-178. doi: 10.1016/j.compgeo.2017.05.001. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/3q84x9jh
© 2017 Elsevier Ltd Generating a realistic representation of a fractured rock mass is a first step in many different analyses. Field observations need to be translated into a 3-D model that will serve as the input for these analyses. The block syste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ff7012db1ec90f1e49c01a076fbc9b6
https://doi.org/10.1016/j.compgeo.2017.05.001
https://doi.org/10.1016/j.compgeo.2017.05.001
Publikováno v:
Computers and Geotechnics. 87:76-85
A fast direct search (FDS) algorithm is presented to increase the efficiency of contact detection for convex polygonal and polyhedral particles. All contact types are detected using only a small subset of these contact types: vertex-to-edge for polyg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a41aafb355a651aa961b63ff8d21695
https://doi.org/10.1016/j.compgeo.2017.02.001
https://doi.org/10.1016/j.compgeo.2017.02.001
Autor:
Nicholas Sitar, Nathaniel Wagner
Publikováno v:
Wagner, N; & Sitar, N. (2016). On seismic response of stiff and flexible retaining structures. Soil Dynamics and Earthquake Engineering, 91, 284-293. doi: 10.1016/j.soildyn.2016.09.025. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/8gb0j4mz
© 2016 Elsevier Ltd This paper presents an overview of the results of experimental and analytical studies of the seismic response of stiff and flexible retaining structures. These studies were motivated by very large dynamic forces in areas of high
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab671d411cc742b39844991091a35c12
https://doi.org/10.1016/j.soildyn.2016.09.025
https://doi.org/10.1016/j.soildyn.2016.09.025