| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
Explosive loads are applied to uniformly expand symmetrical structural components s : tubular cylinders, spherical shells and rings of a steel and light alloys to fragmentation and transfer planar shock waves into plates to spallation with unique explosive initiation techniques, and in addition damage reduction measures : wall doubling of cylinders and notch machining effects on the free surfaces of the plates are evaluated experimentally and numerically. As the results, applicability of a fragmentation model and a penetration model to the fracture of components and the shatterproof of wall doubling cylinders are confirmed, and a spall damage evaluation chart are suggested for damage reduction of plates.
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