News Updates Tuesday 25th Apr 2017 :
  • Welcome to International Press Corporation, world's leading publishers, We have served more than 10000+ authors
  • Articles are invited in engineering, science, technology, management, industrial engg, biotechnology etc.
  • Paper submission last date of March/April 2017 extended to 25 April 2017, Submit online or at editor.ijcet@inpressco.com
  • Our journals are indexed in University of Regensburg Germany, Google Scholar, Cross Reference data bases
  • Applications for reviewers are invited and can be sent directly to concerned editor's mail

Design and Analysis of Crack Stopper


Author : Sairam.Kotari , S.M.Gangadhar A. Amala Ḃ, P.Poornima , P.Janaki Ramulua

Pages : 558-562, DOI:http://Dx.Doi.Org/10.14741/Ijcet/Spl.2.2014.106
Download PDF
Abstract

One of the fail-safe design features is the two-bay crack arrest capability of the airframe. In particular two-bay longitudinal and two-bay circumferential crack arrest feature is the main aspect of design for damage tolerance of the pressurized fuselage cabin. Under fuselage pressurization load cycles fatigue cracks develop at location of maximum tensile stress. There are locations on the airframe which are favorable for the initiation of longitudinal cracks and other locations for circumferential cracks. This investigation identifies one such location from where a longitudinal crack can initiate and studies the fast fracture and crack arrest features under the action of uni-axial hoop stress. The main crack arresting features are the bulkheads and crack stopper straps. A finite element modeling and analysis approach will be used for a realistic consideration of bulkheads and crack stopper straps and their role in the two-bay crack arrest capability of the aircraft. In particular through a stress analysis at a hoop stress corresponding to the design limit load, the load carrying ability of the bulkheads and the crack stopper straps will be assessed. For a realistic representation of two-bay cracking scenario it will be examined under what condition a two-bay crack can be arrested. For the evaluation of crack arrest capability of bulkheads in the stiffened panel with and without the presence of tear strap is studied. The SIF(stress intensity factor) value for different crack length is calculated by analytical (FEM) method.

Keywords: Damage tolerance, circumferential crack, fracture, bulkhead, tear strap, Finite element analysis, fail-safe design.

Article published in International Conference on Advances in Mechanical Sciences 2014, Special Issue-2 (Feb 2014)

 

 

 

Call for Papers
  1. IJCET- March/April-2017 Issue

    Submission Last Date extended to 25 April
  2. IJTT-March-2017
  3. IJAIE-March-2017
  4. IJCSB-March-2017
  • Inpressco Google Scholar
  • Inpressco Science Central
  • Inpressco Global impact factor
  • Inpressco aap

International Press corporation is licensed under a Creative Commons Attribution-Non Commercial NoDerivs 3.0 Unported License
©2010-2017 INPRESSCO® All Rights Reserved