{"title":"Numerical investigation of granular interfaces kinematics","authors":"A. Zervos, I. Vardoulakis, M. Jean, P. Lerat","doi":"10.1002/(SICI)1099-1484(200005)5:4<305::AID-CFM96>3.0.CO;2-W","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1484(200005)5:4<305::AID-CFM96>3.0.CO;2-W","url":null,"abstract":"The numerical method of Contact Dynamics is used in order to simulate the Ring Simple Shear Experiment of a granular medium model (Schneebeli material). The numerical results on the discrete medium are then post-processed in order to construct the displacement fields of an equivalent continuum, and the formation of a shear interface layer is observed. The existence and magnitude of individual grain rotations imply that the equivalent continuum could be a Cosserat continuum in this case, at least for the material inside the interface layer. Porosity profiles are presented, showing the progressive loosening of the granular medium, while its dilation is also measured.","PeriodicalId":100899,"journal":{"name":"Mechanics of Cohesive-frictional Materials","volume":"226 1","pages":"305-324"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77481568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Evaluation of different strategies for the integration of hypoplastic constitutive equations: Application to the CLoE model","authors":"C. Tamagnini, G. Viggiani, R. Chambon, J. Desrues","doi":"10.1002/(SICI)1099-1484(200005)5:4<263::AID-CFM93>3.0.CO;2-Q","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1484(200005)5:4<263::AID-CFM93>3.0.CO;2-Q","url":null,"abstract":"","PeriodicalId":100899,"journal":{"name":"Mechanics of Cohesive-frictional Materials","volume":"27 1","pages":"263-289"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78737841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fracture evolution during indentation of a brittle elastic solid","authors":"A. Selvadurai","doi":"10.1002/(SICI)1099-1484(200005)5:4<325::AID-CFM98>3.0.CO;2-K","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1484(200005)5:4<325::AID-CFM98>3.0.CO;2-K","url":null,"abstract":"This paper examines the problem of crack extension during the indentation of a brittle elastic half-space by a cylindrical punch with a smooth #at contact surface. The paper develops a procedure for locating the point of nucleation of the crack within the brittle elastic solid and employs a boundary element technique to locate the progress of crack evolution as the force on the punch is increased. The numerical results illustrate the in#uence of the extent of crack development on the load}displacement relationship for the indentor. Copyright ( 2000 John Wiley & Sons, Ltd.","PeriodicalId":100899,"journal":{"name":"Mechanics of Cohesive-frictional Materials","volume":"53 1","pages":"325-339"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76767510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of damage and disorder on structural response of quasi-brittle materials","authors":"A. Carpinteri, F. Ciola","doi":"10.1002/(SICI)1099-1484(200005)5:4<255::AID-CFM88>3.0.CO;2-D","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1484(200005)5:4<255::AID-CFM88>3.0.CO;2-D","url":null,"abstract":"SUMMARY The tensile mechanical behaviour of quasi-brittle materials, such as concrete, has been the subject of numerous studies from which there has unequivocally emerged the centrality of the cracking phenomenon. The present study highlights this aspect by evaluating the tensile structural response of an in\"nite plate with an in\"nite set of collinear cracks that are spaced at a constant distance apart and are of variable length according to a distribution of self-similarity. The \"rst part of this paper describes the general features of the method of the pseudo-tractions used to determine the stress-intensity factors, which is based on the application of the principle of superposition. Subsequently, by means of a numerical simulation, in which account is taken of crack propagation and coalescence (excluding overlapping), the link is obtained between critical tensile stress and the incremental displacement due to the damage present in the material, accounting for typical aspects of structural response, such as the strain-softening phenomenon. Copyright ( 2000 John Wiley & Sons, Ltd.","PeriodicalId":100899,"journal":{"name":"Mechanics of Cohesive-frictional Materials","volume":"5 1","pages":"255-262"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74738704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}