Bifurcation and Periodicity in Granular Soils:  Implicationsto Geomechanics and Hazard Mitigation
{'Code': '07030000', 'Directorate': {'Abbreviation': 'ENG', 'LongName': 'Directorate For Engineering'}, 'Division': {'Abbreviation': 'CMMI', 'LongName': 'Div Of Civil, Mechanical, & Manufact Inn'}}
{'SignBlockName': 'J. Eleonora Sabadell', 'PO_EMAI': None, 'PO_PHON': None}
The project will construct an internal, length-dependent plastic                theory for granular materials to be applied to the study of                     instability phenomena.  Analytical, numerical and experimental                  evaluation of this concept will be conducted to determine the ability           of this approach to provide information on the growth and wave                  length selection of the associated deformation inhomogeneities.  The            internal length scale will be introduced either through a Cosserat-             type modification characterizing the assymetry of stress, or a                  gradient-dependent term characterizing the heterogeneity of the                 plastic flow-rule.  The merits and drawbacks of both approaches will            be examined and the simplest possible form will be used to study                three classes of hazard-related problems:  shear banding, surface               instabilities, and liquefaction.  This work will provide a better               understanding of the physical failure processes are fundamental for             the development of appropriate mitigation measures.
{'FirstName': 'Ioannis', 'LastName': 'Vardoulakis', 'PI_MID_INIT': 'G', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Ioannis G Vardoulakis', 'EmailAddress': None, 'NSF_ID': '000385667', 'StartDate': '07/01/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of Minnesota-Twin Cities', 'CityName': 'MINNEAPOLIS', 'ZipCode': '554552009', 'PhoneNumber': '6126245599', 'StreetAddress': '200 OAK ST SE', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Minnesota', 'StateCode': 'MN', 'CONGRESSDISTRICT': '05', 'CONGRESS_DISTRICT_ORG': 'MN05', 'ORG_UEI_NUM': 'KABJZBBJ4B54', 'ORG_LGL_BUS_NAME': 'REGENTS OF THE UNIVERSITY OF MINNESOTA', 'ORG_PRNT_UEI_NUM': None}
{'Name': 'University of Minnesota Institute of Technology', 'CityName': 'Minneapolis', 'StateCode': 'MN', 'ZipCode': '554143208', 'StreetAddress': '2642 Univ Avenue SE', 'CountryCode': 'US', 'CountryName': 'United States', 'StateName': 'Minnesota', 'CountryFlag': '1', 'CONGRESSDISTRICT': '05', 'CONGRESS_DISTRICT_PERF': 'MN05'}
[{'Code': '1448', 'Text': 'GEOTECHNICAL I'}, {'Code': '1474', 'Text': 'NAT & MAN-MADE HAZARD MITIGATI'}]
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8800381.xml'}