Vector space model: Difference between revisions
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'''Bulging factor''' is an [[engineering]] term describing the [[geometry]] of out-of [[plane (geometry)|plane]] [[Deformation (engineering)|deformations]] of the surface of a crack on a [[pressurized]] [[fuselage]] structure. It is used in evaluating the damage tolerance of [[airframe]] fuselages.<ref name="America. Federal Aviation Administration 2004. pp.1-3">United States of America. Federal Aviation Administration. Bulging Factor Solutions for Cracks in Longitudinal Lap Joints of Pressurized Aircraft Fuselages. Springfield, 2004. pp.1-3,10</ref> | |||
The single curved geometry and pressure differential causes a [[longitudinal]] crack to bulge out or protrude from the original shape. This change in geometry, or “bulging effect”, significantly increases the [[stress intensity factor]] at the crack tips. The effects of this [[structural load|loading]] condition can trigger different types of failure mechanisms. | |||
For the case of unstiffened shell structures, the bulging factor can be defined as the ratio of stress-intensity (SIF) of a curved shell to the stress-intensity factor of a flat panel: | |||
<math>bulging factor = SIF(curved)/SIF(flat)</math> | |||
The representation of this phenomenon becomes rather complex due to the [[biaxial]] and internal pressure load and structural configuration.<ref name="America. Federal Aviation Administration 2004. pp.1-3" /> | |||
==References== | |||
{{reflist}} | |||
Lazghab Tarek, Fayza Ayari, Lotfy Chelbi. Crack growth in cylindrical aluminum shells with inner reinforcing foam layer. Springer, 2006. pp. 151. | |||
{{DEFAULTSORT:Bulging Factor}} | |||
[[Category:Pressure vessels]] | |||
{{engineering-stub}} |
Revision as of 13:49, 25 November 2013
Bulging factor is an engineering term describing the geometry of out-of plane deformations of the surface of a crack on a pressurized fuselage structure. It is used in evaluating the damage tolerance of airframe fuselages.[1]
The single curved geometry and pressure differential causes a longitudinal crack to bulge out or protrude from the original shape. This change in geometry, or “bulging effect”, significantly increases the stress intensity factor at the crack tips. The effects of this loading condition can trigger different types of failure mechanisms.
For the case of unstiffened shell structures, the bulging factor can be defined as the ratio of stress-intensity (SIF) of a curved shell to the stress-intensity factor of a flat panel:
The representation of this phenomenon becomes rather complex due to the biaxial and internal pressure load and structural configuration.[1]
References
43 year old Petroleum Engineer Harry from Deep River, usually spends time with hobbies and interests like renting movies, property developers in singapore new condominium and vehicle racing. Constantly enjoys going to destinations like Camino Real de Tierra Adentro.
Lazghab Tarek, Fayza Ayari, Lotfy Chelbi. Crack growth in cylindrical aluminum shells with inner reinforcing foam layer. Springer, 2006. pp. 151.
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