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Probabilistic lifetime strength of aerospace materials via computational simulationThe results of a second year effort of a research program are presented. The research included development of methodology that provides probabilistic lifetime strength of aerospace materials via computational simulation. A probabilistic phenomenological constitutive relationship, in the form of a randomized multifactor interaction equation, is postulated for strength degradation of structural components of aerospace propulsion systems subjected to a number of effects of primitive variables. These primitive variables often originate in the environment and may include stress from loading, temperature, chemical, or radiation attack. This multifactor interaction constitutive equation is included in the computer program, PROMISS. Also included in the research is the development of methodology to calibrate the constitutive equation using actual experimental materials data together with the multiple linear regression of that data.
Document ID
19910020315
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Boyce, Lola (Texas Univ. San Antonio, TX, United States)
Keating, Jerome P. (Texas Univ. San Antonio, TX, United States)
Lovelace, Thomas B. (Texas Univ. San Antonio, TX, United States)
Bast, Callie C. (Texas Univ. San Antonio, TX, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1991
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.26:187178
NASA-CR-187178
Accession Number
91N29629
Funding Number(s)
CONTRACT_GRANT: NAG3-867
PROJECT: RTOP 505-63-5B
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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