NDLI: An equivalent uniaxial fatigue stress model for analyzing landing gear fuse pins

Content Provider	Springer Nature Link
Author	Narayan, K. Behdinan, K. Vanderpol, P.
Copyright Year	2006
Abstract	We study the biaxial stress state conditions in landing gear fuse pins in the fuse groove. This biaxial state comprises a combination of shear stresses which are usually the largest stresses in the fuse pin by design, and compressive stresses which keep the half-section of the fuse pin in equilibrium. Conventional fatigue analysis techniques use an equivalent uniaxial stress, based on the Mises stress of a pure-shear condition. The respective predicted fatigue damages are much higher than those obtained from fuse pin cyclic tests. A new equivalent uniaxial fatigue stress model is proposed that includes the additional compressive stress as a relief on the fatigue damage in the fuse groove, thereby explaining the observations from fuse pin tests. The model is used in conventional uniaxial strain-life fatigue software (Goodrich Aerospace’s Fatigue Life V2) to predict the fatigue damage on a landing gear fuse pin with a sample load spectrum. The results are then compared to the pure shear model, and to a biaxial finite element fatigue analysis. As compared to the equivalent Mises model, the proposed model provides less conservative estimation of the fuse pin fatigue life, the latter value being higher than that provided by the two-dimensional finite element calculation.
Starting Page	278
Ending Page	288
Page Count	11
File Format	PDF
ISSN	00392316
Journal	Strength of Materials
Volume Number	38
Issue Number	3
e-ISSN	15739325
Language	English
Publisher	Kluwer Academic Publishers-Consultants Bureau
Publisher Date	2006-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	landing gear biaxial stress state fatigue two-dimensional finite element calculation Characterization and Evaluation Materials Mechanics Structural Mechanics
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials

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