The Incorporation of Localized Softening in a Constitutive  Model for Frictional Materials
{'Code': '07030000', 'Directorate': {'Abbreviation': 'ENG', 'LongName': 'Directorate For Engineering'}, 'Division': {'Abbreviation': 'CMMI', 'LongName': 'Div Of Civil, Mechanical, & Manufact Inn'}}
{'SignBlockName': 'William Hakala', 'PO_EMAI': None, 'PO_PHON': None}
The focus of this research is to investigate a formulation that yields          simultaneously the essence of softening and localization phenomena.             The three-dimensional model will be based on viscoplasticity in which           the yield function contains a strain gradient in addition to the usual          internal variables.  The non-local formulation circumvents many of the          arguments against the existence of strain softening.  An investigation          will be made of a numerical scheme to obtain solutions to structural            problems with localized softening features.  The accuracy of the model          and the usefulness of the approach for predicting softening will be             demonstrated by making comparisons between theoretical and experimental         data on concrete specimens and on reinforced concrete beams subjected           to combined transverse and axial loading.
{'FirstName': 'Howard', 'LastName': 'Schreyer', 'PI_MID_INIT': 'L', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Howard L Schreyer', 'EmailAddress': 'schreyer@me.unm.edu', 'NSF_ID': '000326508', 'StartDate': '08/15/1985', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of New Mexico', 'CityName': 'ALBUQUERQUE', 'ZipCode': '87131', 'PhoneNumber': '5052774186', 'StreetAddress': '1700 LOMAS BLVD NE STE 2200', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'New Mexico', 'StateCode': 'NM', 'CONGRESSDISTRICT': '01', 'CONGRESS_DISTRICT_ORG': 'NM01', 'ORG_UEI_NUM': 'F6XLTRUQJEN4', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF NEW MEXICO', 'ORG_PRNT_UEI_NUM': None}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '144200', 'Text': 'CONSTRUCTION AND INFRASTRUCTUR'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1985&All=true', 'xml': '8511786.xml'}