A Method for Preventing Catastrophic Failure in Aluminum Stressed Skin Panels

reportActive / Technical Report | Accession Number: AD0866206 | Open PDF

Abstract:

Crack arrest and residual strength tests were conducted on 12-inch- wide bare and clad T6 aluminum alloy specimens to determine the effects of thin straps of fiberglass tape bonded to the specimens. The tests indicated that running cracks can be arrested by the fiberglass straps. Significant increases in the crack arrest behavior of up to 48 percent were obtained with two 0.75- inch by 0.010-inch straps spaces 2.75 inches apart on the front and back sides of the specimen. Residual static strength values for a specimen with a 2-4 inch-long crack approaching the ultimate tensile strength of the material were achieved by this method.

Author(s):
Roach, Charles D. ; Figge, Sr, I. E.,
Author Organization(s):
ARMY AVIATION MATERIEL LABS FORT EUSTIS VA
Descriptive Note:
Technical note
Pagination:
0036

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
USAAVLABS-TN-1
Task Number(s):
1F162204A17003
Project Number(s):
DA-1-F-162204-A-170
Monitor Series:
USAAVLABS
 Subject Terms
Joint Capability Areas:
JCA_8_Building Partnerships; JCA_3_Force Application; JCA_8.2_Shape; JCA_3.2_Engagement; JCA_3.2.1_Kinetic Means; JCA_8.1_Communicate; JCA_5_Command and Control; JCA_3.1.3_Maneuver to Influence; JCA_3.1_Maneuver; JCA_8.1.1_Inform Domestic and Foreign Audiences; JCA_8.1.3_Influence Adversary and Competitor Audiences; JCA_8.2.1_Partner with Governments and Institutions; JCA_8.2.2_Provide Aid to Foreign Partners and Institutions; JCA_8.2.3_Build the Capabilities and Capacities of Partners and Institutions; JCA_8.2.5_Strengthen Global Defense Posture
Modernization Areas:
Directed Energy
Communities of Interest:
Weapons Technologies
Descriptor(s):
*ALUMINUM ALLOYS, *GLASS TEXTILES, *REINFORCING MATERIALS, BONDING, COMPOSITE MATERIALS, CRACK PROPAGATION, CRACKS, LOADS(FORCES), STRESSES, SUBSTRATES, TAPES, TOUGHNESS
Field(s)/Group(s):
Aircraft, Coatings, Colorants and Finishes, Mechanics
Keyword(s):
*AIRPLANE PANELS, ALUMINUM ALLOY 7075
Report Date:
1969 Dec 01