NDLI: Elastic plastic fracture mechanics methodology for surface cracks

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Elastic plastic fracture mechanics methodology for surface cracks

Content Provider	NASA Technical Reports Server (NTRS)
Author	Boatwright, D. W. Ernst, Hugo A. Curtin, W. J. Lambert, D. M.
Copyright Year	1993
Description	The Elastic Plastic Fracture Mechanics (EPFM) Methodology has evolved significantly in the last several years. Nevertheless, some of these concepts need to be extended further before the whole methodology can be safely applied to structural parts. Specifically, there is a need to include the effect of constraint in the characterization of material resistance to crack growth and also to extend these methods to the case of 3D defects. As a consequence, this project was started as a 36 month research program with the general objective of developing an EPFM methodology to assess the structural reliability of pressure vessels and other parts of interest to NASA containing defects. This report covers a computer modelling algorithm used to simulate the growth of a semi-elliptical surface crack; the presentation of a finite element investigation that compared the theoretical (HRR) stress field to that produced by elastic and elastic-plastic models; and experimental efforts to characterize three dimensional aspects of fracture present in 'two dimensional', or planar configuration specimens.
File Size	3014720
Page Count	114
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19940006257
Archival Resource Key	ark:/13960/t76t5kp36
Language	English
Publisher Date	1993-08-01
Access Restriction	Open
Subject Keyword	Structural Mechanics J Integral Crack Tips Fracture Mechanics Structural Reliability Planar Structures Computer Programs Crack Propagation Finite Element Method Crack Opening Displacement Elastoplasticity Stress Distribution Crack Geometry Mathematical Models Fracture Strength Surface Cracks 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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