Accession Number:

AD0488707

Title:

EFFECT OF CORROSION CONTROL TECHNIQUES ON FATIGUE LIFE OF TYPICAL AIRCRAFT JOINTS.

Descriptive Note:

Rept. for Feb 65-Mar 66,

Corporate Author:

NATIONAL CASH REGISTER CO DAYTON OH

Report Date:

1966-06-01

Pagination or Media Count:

31.0

Abstract:

Riveted lap-shear joints fastened using bare rivets and rivets coated with encapsulated MIL-P-8585 zinc chromate primer, encapsulated MIL-S-8802 sealant, wet dipped MIL-P-8585 primer and molybdenum disulfude dry film fastener lubricant and with bare faying surfaces and faying surfaces coated with MIL-S-8802 sealant, preformed polysulfide film, and preformed polyester film Mylar coated with encapsulated MIL-S-8802 sealant were evaluated by tension-tension fatigue testing. Test results indicated that fatigue life was reduced when any of the previous materials were applied to the fasteners or fastener holes with bare faying surfaces as compared to the fatigue life of joints containing bare rivets with bare faying surfaces. However, when MIL-S-8802 sealant or preformed polysulfide film was sandwiched between the faying surfaces of the joint prior to riveting, fatigue life of specimens having rivets coated with any of the preceding materials was equal to or exceeded the fatigue life of specimens having bare rivets with bare specimen faying surfaces. Specimens having encapsulated sealant coated Mylar film between the faying surfaces had slightly lower fatigue lives than specimens having bare rivets with bare faying surfaces. Author

Subject Categories:

  • Aircraft
  • Properties of Metals and Alloys
  • Fabrication Metallurgy
  • Plastics
  • Couplers, Fasteners and Joints

Distribution Statement:

APPROVED FOR PUBLIC RELEASE