Extension of State Variable Theories to High Temperature    Multiaxial Cyclic Loading
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{'SignBlockName': 'Barbara Weatherly', 'PO_EMAI': 'bweather@nsf.gov', 'PO_PHON': '7032927384'}
Prediction of component failure at high temperature such as in gas              turbine engines and rocket engines is an extremely complex issue                because of the combined effects of creep, plasticity and strength, and          modulus degradation with time and temperature.  The prediction becomes          even more complex when cyclic loads are encountered and when the state          of stress is multiaxial and non-proportional.  The research program             addresses this important class of problems through the use of state             variable cyclic viscoplasticity theory to model the behavior of the             material under isothermal conditions.
{'FirstName': 'David', 'LastName': 'McDowell', 'PI_MID_INIT': 'L', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'David L McDowell', 'EmailAddress': 'david.mcdowell@me.gatech.edu', 'NSF_ID': '000403912', 'StartDate': '07/01/1986', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
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{'Code': '1441', 'Text': 'MECHANICS'}
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