Shear strength and microstructure of polydisperse packings: The effect of size span and shape of particle size distribution.
Identifieur interne : 000759 ( PubMed/Corpus ); précédent : 000758; suivant : 000760Shear strength and microstructure of polydisperse packings: The effect of size span and shape of particle size distribution.
Auteurs : Emilien Azéma ; Sandra Linero ; Nicolas Estrada ; Arcesio LizcanoSource :
- Physical review. E [ 2470-0053 ] ; 2017.
Abstract
By means of extensive contact dynamics simulations, we analyzed the effect of particle size distribution (PSD) on the strength and microstructure of sheared granular materials composed of frictional disks. The PSDs are built by means of a normalized β function, which allows the systematic investigation of the effects of both, the size span (from almost monodisperse to highly polydisperse) and the shape of the PSD (from linear to pronouncedly curved). We show that the shear strength is independent of the size span, which substantiates previous results obtained for uniform distributions by packing fraction. Notably, the shear strength is also independent of the shape of the PSD, as shown previously for systems composed of frictionless disks. In contrast, the packing fraction increases with the size span, but decreases with more pronounced PSD curvature. At the microscale, we analyzed the connectivity and anisotropies of the contacts and forces networks. We show that the invariance of the shear strength with the PSD is due to a compensation mechanism which involves both geometrical sources of anisotropy. In particular, contact orientation anisotropy decreases with the size span and increases with PSD curvature, while the branch length anisotropy behaves inversely.
DOI: 10.1103/PhysRevE.96.022902
PubMed: 28950486
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E</title><idno type="eISSN">2470-0053</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">By means of extensive contact dynamics simulations, we analyzed the effect of particle size distribution (PSD) on the strength and microstructure of sheared granular materials composed of frictional disks. The PSDs are built by means of a normalized β function, which allows the systematic investigation of the effects of both, the size span (from almost monodisperse to highly polydisperse) and the shape of the PSD (from linear to pronouncedly curved). We show that the shear strength is independent of the size span, which substantiates previous results obtained for uniform distributions by packing fraction. Notably, the shear strength is also independent of the shape of the PSD, as shown previously for systems composed of frictionless disks. In contrast, the packing fraction increases with the size span, but decreases with more pronounced PSD curvature. At the microscale, we analyzed the connectivity and anisotropies of the contacts and forces networks. We show that the invariance of the shear strength with the PSD is due to a compensation mechanism which involves both geometrical sources of anisotropy. In particular, contact orientation anisotropy decreases with the size span and increases with PSD curvature, while the branch length anisotropy behaves inversely.</div></front></TEI><pubmed><MedlineCitation Status="In-Data-Review" Owner="NLM"><PMID Version="1">28950486</PMID><DateCreated><Year>2017</Year><Month>09</Month><Day>27</Day></DateCreated><DateRevised><Year>2017</Year><Month>09</Month><Day>27</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">2470-0053</ISSN><JournalIssue CitedMedium="Internet"><Volume>96</Volume><Issue>2-1</Issue><PubDate><Year>2017</Year><Month>Aug</Month></PubDate></JournalIssue><Title>Physical review. E</Title><ISOAbbreviation>Phys Rev E</ISOAbbreviation></Journal><ArticleTitle>Shear strength and microstructure of polydisperse packings: The effect of size span and shape of particle size distribution.</ArticleTitle><Pagination><MedlinePgn>022902</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1103/PhysRevE.96.022902</ELocationID><Abstract><AbstractText>By means of extensive contact dynamics simulations, we analyzed the effect of particle size distribution (PSD) on the strength and microstructure of sheared granular materials composed of frictional disks. The PSDs are built by means of a normalized β function, which allows the systematic investigation of the effects of both, the size span (from almost monodisperse to highly polydisperse) and the shape of the PSD (from linear to pronouncedly curved). We show that the shear strength is independent of the size span, which substantiates previous results obtained for uniform distributions by packing fraction. Notably, the shear strength is also independent of the shape of the PSD, as shown previously for systems composed of frictionless disks. In contrast, the packing fraction increases with the size span, but decreases with more pronounced PSD curvature. At the microscale, we analyzed the connectivity and anisotropies of the contacts and forces networks. We show that the invariance of the shear strength with the PSD is due to a compensation mechanism which involves both geometrical sources of anisotropy. In particular, contact orientation anisotropy decreases with the size span and increases with PSD curvature, while the branch length anisotropy behaves inversely.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Azéma</LastName><ForeName>Emilien</ForeName><Initials>E</Initials><AffiliationInfo><Affiliation>Laboratoire de Mécanique et Génie Civil (LMGC), Université de Montpellier, CNRS, Montpellier, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Linero</LastName><ForeName>Sandra</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>University of Newcastle, Faculty of Engineering and Build Environment, University Dr Callaghan NSW2308, Australia.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>SRK Consulting (Australasia) Pty Ltd, 10 Richardson St WA6005, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Estrada</LastName><ForeName>Nicolas</ForeName><Initials>N</Initials><AffiliationInfo><Affiliation>Departamento de Ingeniería Civil y Ambiental, Universidad de Los Andes, Bogotá, Colombia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Lizcano</LastName><ForeName>Arcesio</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>SRK Consulting (Canada) Inc, 1066 West Hastings St, BC V6E 3X2, Canada.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2017</Year><Month>08</Month><Day>14</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Phys Rev E</MedlineTA><NlmUniqueID>101676019</NlmUniqueID><ISSNLinking>2470-0045</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2017</Year><Month>04</Month><Day>18</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>9</Month><Day>28</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2017</Year><Month>9</Month><Day>28</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2017</Year><Month>9</Month><Day>28</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">28950486</ArticleId><ArticleId IdType="doi">10.1103/PhysRevE.96.022902</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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