Dilatancy, shear jamming, and a generalized jamming phase diagram of frictionless sphere packings

doi:10.1039/d0sm02186e

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	Dilatancy, shear jamming, and a generalized jamming phase diagram of frictionless sphere packings
	Babu, Varghese ; Pan, Deng 1; Jin, Yuliang 1,2; Chakraborty, Bulbul 3; Sastry, Srikanth
刊名	SOFT MATTER
	2021
卷号	17 期号:11 页码:3121-3127
关键词	DENSE EQUILIBRIUM SOFT
ISSN号	1744-683X
DOI	10.1039/d0sm02186e
英文摘要	Granular packings display the remarkable phenomenon of dilatancy, wherein their volume increases upon shear deformation. Conventional wisdom and previous results suggest that dilatancy, also being the related phenomenon of shear-induced jamming, requires frictional interactions. Here, we show that the occurrence of isotropic jamming densities phi (j) above the minimal density (or the J-point density) phi (J) leads both to the emergence of shear-induced jamming and dilatancy in frictionless packings. Under constant pressure shear, the system evolves into a steady-state at sufficiently large strains, whose density only depends on the pressure and is insensitive to the initial jamming density phi (j). In the limit of vanishing pressure, the steady-state exhibits critical behavior at phi (J). While packings with different phi (j) values display equivalent scaling properties under compression, they exhibit striking differences in rheological behaviour under shear. The yield stress under constant volume shear increases discontinuously with density when phi (j) > phi (J), contrary to the continuous behaviour in generic packings that jam at phi (J). Our results thus lead to a more coherent, generalised picture of jamming in frictionless packings, which also have important implications on how dilatancy is understood in the context of frictional granular matter.
学科主题	Chemistry ; Materials Science ; Physics ; Polymer Science
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27305]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Jawaharlal Nehru Ctr Adv Sci Res, Jakkur Campus, Bengaluru 560064, India 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 4.Brandeis Univ, Martin Fisher Sch Phys, Waltham, MA 02454 USA
推荐引用方式 GB/T 7714	Babu, Varghese,Pan, Deng,Jin, Yuliang,et al. Dilatancy, shear jamming, and a generalized jamming phase diagram of frictionless sphere packings[J]. SOFT MATTER,2021,17(11):3121-3127.
APA	Babu, Varghese,Pan, Deng,Jin, Yuliang,Chakraborty, Bulbul,&Sastry, Srikanth.(2021).Dilatancy, shear jamming, and a generalized jamming phase diagram of frictionless sphere packings.SOFT MATTER,17(11),3121-3127.
MLA	Babu, Varghese,et al."Dilatancy, shear jamming, and a generalized jamming phase diagram of frictionless sphere packings".SOFT MATTER 17.11(2021):3121-3127.