東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Response of Granular Materials to Sh...

Wang, Dong.

FindBook

Google Book

Amazon

博客來

Response of Granular Materials to Shear: Origins of Shear Jamming, Particle Dynamics, and Effects of Particle Properties.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Response of Granular Materials to Shear: Origins of Shear Jamming, Particle Dynamics, and Effects of Particle Properties./
作者:	Wang, Dong.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	121 p.
附註:	Source: Dissertations Abstracts International, Volume: 79-11, Section: B.
Contained By:	Dissertations Abstracts International79-11B.
標題:	Physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10749267
ISBN:	9780355907933

Response of Granular Materials to Shear: Origins of Shear Jamming, Particle Dynamics, and Effects of Particle Properties.
Wang, Dong.

Response of Granular Materials to Shear: Origins of Shear Jamming, Particle Dynamics, and Effects of Particle Properties. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 121 p.

Source: Dissertations Abstracts International, Volume: 79-11, Section: B.

Thesis (Ph.D.)--Duke University, 2018.

This item is not available from ProQuest Dissertations & Theses.

Granular materials under shear are common in nature and industry. Previous results show changes of system behaviors when friction is added and particle shapes are varied, e.g. shear jamming for frictional grains. Understanding these changes depends on characterization of deformation induced by shear. However, previous studies mainly focus on yielding processes and are locally symmetric, e.g. shear transformation zones (STZ's). Besides, the grain scale explanation is lacking. In this thesis, I study the shear response of granular materials with various particle properties in two dimension, utilizing a novel setup that suppresses shear banding. Particles made of photoelastic materials can reveal inter-particle contact forces and be customized to have different friction and shapes. I propose novel minimum structures, trimers and branches, that account for shear jamming. These structures are locally asymmetric, which is contrary to STZ's. Systems with three different friction coefficients μ are studied: 0.15, 0.7 and one higher than 1.7. Shear jamming is still observed for the lowest μ studied, with the lowest value of packing fraction &phis; for shear jamming, &phis;S, increasing as μ decreases. Furthermore, these systems for all μ show abnormal diffusion under cyclic shear. The diffusion exponents show transitions as &phis; increases, with a μ-dependent onset &phis;. This behavior is consistent with the non-affine displacements under linear shear. In addition, systems composed of ellipses exhibit novel structural and mechanical responses different from disks, e.g., nematic ordering and local density variability under shear.

ISBN: 9780355907933Subjects--Topical Terms:

516296
Physics.

Response of Granular Materials to Shear: Origins of Shear Jamming, Particle Dynamics, and Effects of Particle Properties.
LDR:02822nmm a2200325 4500 001 2210313
005 20191121124202.5
008 201008s2018 ||||||||||||||||| ||eng d
020 $a 9780355907933
035 $a (MiAaPQ)AAI10749267
035 $a (MiAaPQ)duke:14510
035 $a AAI10749267
040 $a MiAaPQ $c MiAaPQ
100 1 $a Wang, Dong. $3 1044042
245 1 0 $a Response of Granular Materials to Shear: Origins of Shear Jamming, Particle Dynamics, and Effects of Particle Properties.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 121 p.
500 $a Source: Dissertations Abstracts International, Volume: 79-11, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Behringer, Robert P.
502 $a Thesis (Ph.D.)--Duke University, 2018.
506 $a This item is not available from ProQuest Dissertations & Theses.
506 $a This item must not be sold to any third party vendors.
520 $a Granular materials under shear are common in nature and industry. Previous results show changes of system behaviors when friction is added and particle shapes are varied, e.g. shear jamming for frictional grains. Understanding these changes depends on characterization of deformation induced by shear. However, previous studies mainly focus on yielding processes and are locally symmetric, e.g. shear transformation zones (STZ's). Besides, the grain scale explanation is lacking. In this thesis, I study the shear response of granular materials with various particle properties in two dimension, utilizing a novel setup that suppresses shear banding. Particles made of photoelastic materials can reveal inter-particle contact forces and be customized to have different friction and shapes. I propose novel minimum structures, trimers and branches, that account for shear jamming. These structures are locally asymmetric, which is contrary to STZ's. Systems with three different friction coefficients μ are studied: 0.15, 0.7 and one higher than 1.7. Shear jamming is still observed for the lowest μ studied, with the lowest value of packing fraction &phis; for shear jamming, &phis;S, increasing as μ decreases. Furthermore, these systems for all μ show abnormal diffusion under cyclic shear. The diffusion exponents show transitions as &phis; increases, with a μ-dependent onset &phis;. This behavior is consistent with the non-affine displacements under linear shear. In addition, systems composed of ellipses exhibit novel structural and mechanical responses different from disks, e.g., nematic ordering and local density variability under shear.
590 $a School code: 0066.
650 4 $a Physics. $3 516296
690 $a 0605
710 2 $a Duke University. $b Physics. $3 1035984
773 0 $t Dissertations Abstracts International $g 79-11B.
790 $a 0066
791 $a Ph.D.
792 $a 2018
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10749267