Axial crack propagation and arrest in a pressurized cylinder: An experimental-numerical analysis |
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Authors: | M Kosai A Shimamoto C T Yu A S Kobayashi P W Tan |
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Institution: | 1. Boeing Commercial Airplane Group, 98124-2207, Seattle, WA 2. Saitama Institute of Technology, 369-02, Saitama, Japan 3. Applied Precision, 98027-8929, Issaquah, WA 4. University of Washington, 98195-2600, Seattle, WA 5. Federal Aviation Administration, Technical Center, Atlantic City International Airport, 08405, NJ
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Abstract: | The feasibility of using a previously developed crack-kinking criterion to predict crack arrest at a tear strap in a pressurized
fuselage was studied with instrumented axial rupture tests of 21 models of an idealized fuselage. A rapidly propagating axial
crack, which was initiated from a precrack, kinked immediately upon extension and propagated diagonally until it turned circumferentially
and propagated along the tear straps. An elastodynamic finite element analysis of the rupturing model fuselage yielded the
mixed-mode stress intensity factors,K
I
andK
II
, and the remote stress component, σ
OX
. This numerical procedure was also used to predict the crack trajectories in full-scale fuselage rupture tests. All numerical
results agreed well with their measured counterparts regardless of size. |
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Keywords: | |
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