Axial Multiple Crack Propagation and Crack Kinking Criteria in Pressurized Fuselage

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概要

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• In order to clarify the effect of tear strap in airplane fuselage on crack arrest, experimental research and numerical simulation were carried out in this study. Interaction of multiple axial pre-cracks in a pressurized fuselage was investigated using a small-scale model of an idealized fuselage. The strain between multiple cracks under the situation of rapid crack propagation was measured. The experimental results of a rupturing model fuselage represented the variations of stress intensity factors K_I and K_<II> in the mixed mode and the remote stress components σ_<0X> with crack extension. Deformation at the tips of asymmetrical cracks along the stringer was analyzed by a hybrid method using a finite element analysis program, MDC DYTRAN. The recorded crack velocities were in good agreement with the results of finite element analysis. The crack kinking location, kinking angle and the off-axis crack trajectory were also predicted by numerical analysis and the validity of the calculated results was discussed in comparison with the experimental data.

• 社団法人日本材料学会の論文
• 2004-03-15

著者

• KOBAYASHI Albert

  Department of Mechanical Engineering, University of Washington

• Shimamoto Akira

  Department Of Mechanical Engineering Saitama Institute Of Technology

• Ju Dong-ying

  Department Of Mechanical Engineering Saitama Institute Of Technology

• OGUCHI Toshihiro

  SUMITA Optical Glass, Inc., R&D Division

• Kobayashi Albert

  Department Of Mechanical Engineering University Of Washington

• Oguchi Toshihiro

  Sumita Optical Glass Inc. R&d Division

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