| Budget Amount *help |
¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
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| Outline of Final Research Achievements |
This study aimed to establish an integrity evaluation technology for aircraft composite structures against bird strike events and developed a numerical method to predicting bird-strike damage of CFRP laminates. More specifically, we developed an improved smoothed particle hydrodynamics (SPH) that achieved inhomogeneous initial particles arrangement and resulting reduction of calculation cost. Moreover, a material softening model was introduced into the constitutive equation of a particle to represent energy absorption due to crack extension. This approach enabled us to analyze extension of delamination in composite laminates. We finally predicted bird-strike damage of CFRP cross-ply laminates, and demonstrated that the present method could represent the damage extension observed in the experiments.
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