Mechanics of Interfaces/The Mechanics of Adhesion Testing   of Flexible Films
{'Code': '07030000', 'Directorate': {'LongName': 'Directorate For Engineering'}, 'Division': {'LongName': 'Div Of Civil, Mechanical, & Manufact Inn'}}
{'SignBlockName': 'Jerome Sackman'}
High strength material performance at elevated temperatures is a                critical concern in the design of power generating systems.  The                micromechanics of material failure near the tip of a macroscopic crack          will be analyzed.  At elevated temperatures, cracks usually propagate           along grain boundaries that have been weakened by the nucleation and            subsequent growth of cavities.  The objective of this research is to            analyze in detail the nucleation and growth of cavities near                    pre-existing cracks and to determine the effects of size and spacing of         second-phase particles which nucleate cavities (e.g., carbides or               sulphides) on the conditions for crack propagation.  The solution of            such problems will improve our basic understanding of the                       micromechanisms responsible for material failure at elevated                    temperatures and will identify macroscopic fracture parameters.
{'FirstName': 'Nikolaos', 'LastName': 'Aravas', 'EmailAddress': None, 'StartDate': '07/15/1993', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of Pennsylvania', 'CityName': 'Philadelphia', 'ZipCode': '191046205', 'PhoneNumber': '2158987293', 'StreetAddress': 'Research Services', 'CountryName': 'United States', 'StateName': 'Pennsylvania', 'StateCode': 'PA'}
{'Code': '1441', 'Text': 'MECHANICS'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1986&All=true', 'xml': '8657860.xml'}