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Fracture Test Methods for Plastically Responding COPV LinersAn experimental procedure for evaluating the validity of using uniaxial tests to provide a conservative bound on the fatigue crack growth rate behavior small cracks in bi-axially loaded Composite Overwrapped Pressure Vessel (COPV) liners is described. The experimental procedure included the use of a laser notch to quickly generate small surface fatigue cracks with the desired size and aspect ratios. An out-of-plane constraint system was designed to allow fully reversed, fully plastic testing of thin sheet uniaxial coupons. Finally, a method was developed to determine to initiate small cracks in the liner of COPVs.
Document ID
20090019678
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Dawicke, David S. (Analytical Services and Materials, Inc. Hampton, VA, United States)
Lewis, Joseph C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
May 4, 2009
Subject Category
Structural Mechanics
Report/Patent Number
AIAA Paper 2009-2516
LF99-8561
Report Number: AIAA Paper 2009-2516
Report Number: LF99-8561
Meeting Information
Meeting: 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
Location: California
Country: United States
Start Date: May 4, 2009
End Date: May 7, 2009
Sponsors: American Inst. of Aeronautics and Astronautics
Distribution Limits
Public
Copyright
Public Use Permitted.

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