NDLI: Test-free fracture toughness (Document No: 20030063910)

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Test-free fracture toughness (Document No: 20030063910)

Content Provider	NASA Technical Reports Server (NTRS)
Author	Minnetyan, Levon Chamis, Christos C. Technical Monitor
Copyright Year	2003
Description	Computational simulation results can give the prediction of damage growth and progression and fracture toughness of composite structures. The experimental data from literature provide environmental effects on the fracture behavior of metallic or fiber composite structures. However, the traditional experimental methods to analyze the influence of the imposed conditions are expensive and time consuming. This research used the CODSTRAN code to model the temperature effects, scaling effects and the loading effects of fiber/braided composite specimens with and without fiber-optic sensors on the damage initiation and energy release rates. The load-displacement relationship and fracture toughness assessment approach is compared with the test results from literature and it is verified that the computational simulation, with the use of established material modeling and finite element modules, adequately tracks the changes of fracture toughness and subsequent fracture propagation for any fiber/braided composite structure due to the change of fiber orientations, presence of large diameter optical fibers, and any loading conditions.
File Size	1569685
Page Count	79
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20030063910
Archival Resource Key	ark:/13960/t01z9551z
Language	English
Publisher Date	2003-06-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Optical Fibers Finite Element Method Shear Properties Stress-strain Relationships Fiber Composites Mechanical Properties Fiber Orientation Computerized Simulation Fracture Strength Computer Programs Loads Forces Crack Propagation 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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