NDLI: Fracture mechanics life analytical methods verification testing

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Fracture mechanics life analytical methods verification testing

Content Provider	NASA Technical Reports Server (NTRS)
Author	Ingraffea, A. R. Clemons, T. G. Wawrzynek, P. A. Riddell, W. T. Favenesi, J. A.
Copyright Year	1994
Description	The objective was to evaluate NASCRAC (trademark) version 2.0, a second generation fracture analysis code, for verification and validity. NASCRAC was evaluated using a combination of comparisons to the literature, closed-form solutions, numerical analyses, and tests. Several limitations and minor errors were detected. Additionally, a number of major flaws were discovered. These major flaws were generally due to application of a specific method or theory, not due to programming logic. Results are presented for the following program capabilities: K versus a, J versus a, crack opening area, life calculation due to fatigue crack growth, tolerable crack size, proof test logic, tearing instability, creep crack growth, crack transitioning, crack retardation due to overloads, and elastic-plastic stress redistribution. It is concluded that the code is an acceptable fracture tool for K solutions of simplified geometries, for a limited number of J and crack opening area solutions, and for fatigue crack propagation with the Paris equation and constant amplitude loads when the Paris equation is applicable.
File Size	11112104
Page Count	274
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19950017686
Archival Resource Key	ark:/13960/t8pc7x98q
Language	English
Publisher Date	1994-09-16
Access Restriction	Open
Subject Keyword	J Integral Fatigue Life Creep Properties Fracture Mechanics Program Verification Computers Crack Propagation Cracks Stress Intensity Factors Elastoplasticity Stress Distribution Fatigue Materials Cracking Fracturing Applications Programs Computers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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