Transcription of Avoiding knife-edge countersinks in GLARE through dimpling
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Avoiding knife-edge countersinks in GLARE through dimpling
Page 1 of 21 Avoiding knife -edge countersinks in GLARE through dimpling Submitted to Fatigue and Fracture of Engineering Materials and Structures on March 4, 2004 C. Rans*, Straznicky Department of Mechanical and Aerospace Engineering Carleton University 1125 Colonel By Drive Ottawa, Ontario, Canada, K1S 5B6 ABSTRACT Traditional machine countersinking practices create a knife -edge condition in one or more of the outer aluminum layers in riveted GLARE joints. Press countersinking ( dimpling ) provides an alternative method of countersinking that prevents the formation of a knife -edge; however, its application and potential benefits to fatigue performance in GLARE are not known. This paper investigates the dimple forming process and its application to GLARE , and the resulting benefits in fatigue crack initiation life in unfilled rivet holes.
Page 1 of 21 Avoiding knife-edge countersinks in GLARE through dimpling Submitted to Fatigue and Fracture of Engineering Materials and Structures on March 4, 2004 C. Rans*, P.V. Straznicky Department of Mechanical and Aerospace Engineering
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