Investigation of Stiffener Run-Out Failure
The interface weakness is of major concern in stiffener run-out regions where the stiffener is terminated due to a cut-out, intersecting rib, or some other structural feature which interrupts the load path. More damage tolerant stiffener run-outs are clearly required and these are investigated in this paper. Using a parametric Finite Element analysis, the run-out region was optimised for stable debonding crack growth. The baseline and modified run-out designs were manufactured and tested. Damage initiation and propagation were investigated in detail using state-of-the-art monitoring equipment including Acoustic Emission and Digital Image Correlation. As expected, the baseline configuration failed catastrophically. The modified run-out showed slightly improved stability, but delamination failure in the stiffener promptly led to catastrophic failure. The FE model was revised to include delamination, and a second design and experimental iteration was carried out, leading to a design with increased damage tolerance.
Stiffener run-out Design Composite Failure Bonding
S.Psarras S.T.Pinho B.G.Falzon
Dpt. Aeronautics, Imperial College London, SW7 2AZ, United Kingdom Dpt. Mechanical and Aerospace Engineering, Monash University, Victoria, 3800, Australia
国际会议
2011年亚太航空航天技术学术会议(APISAT 2011)
澳大利亚
英文
1-10
2011-02-28（万方平台首次上网日期，不代表论文的发表时间）