Strain Softening Modeling of Concrete in the Post-Fracture  Range
{'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}
In this project, it is intended to study the theoretical basis of               strain-softening plasticity in modeling deformational and failure               behaviors of concrete materials in the post-fracture range; to develop          a comprehensive three-dimensional stress-strain relation for concrete           based on the theoretical studies covering a wide range of stress                conditions including the post-fracture softening behavior; to implement         the model into a three-dimensional nonlinear finite element analysis            program, and to verify the program by solving some boundary value               problems of practical significance.  In this study, special emphasis            will be placed on strain-softening modeling of concrete material in the         post-fracture range, within the general framework of strain-space               formulation of plasticity based on Ilyushin's postulate and the                 fracture theory.  A more general strain-space formulation, which                accounts for both plastic and fracturing of concrete, will be                   developed.
{'FirstName': 'Wai-Fah', 'LastName': 'Chen', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Wai-Fah Chen', 'EmailAddress': 'chenwf@wiliki.eng.hawaii.edu', 'NSF_ID': '000454904', 'StartDate': '10/01/1985', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Purdue University', 'CityName': 'WEST LAFAYETTE', 'ZipCode': '479061332', 'PhoneNumber': '7654941055', 'StreetAddress': '2550 NORTHWESTERN AVE # 1100', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Indiana', 'StateCode': 'IN', 'CONGRESSDISTRICT': '04', 'CONGRESS_DISTRICT_ORG': 'IN04', 'ORG_UEI_NUM': 'YRXVL4JYCEF5', 'ORG_LGL_BUS_NAME': 'PURDUE UNIVERSITY', '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': '1442', 'Text': 'CONSTRUCTION AND INFRASTRUCTUR'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1985&All=true', 'xml': '8500398.xml'}