期刊
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
卷 139, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijimpeng.2020.103533
关键词
Hybrid design; Fluid filling; Sandwich beam; Foam projectile; Impact resistance
资金
- National Key Research and Development Program of China [2017YFB1102801]
- National Natural Science Foundation of China [11972185]
- Key Laboratory of Intense Dynamic Loading and Effect [KLIDLE1801]
- Aviation Science Foundation [20170970002]
- State Key Laboratory of Mechanics and Control of Mechanical Structures(Nanjing University of Aeronautics and astronautics) [MCMS-E0219K02]
The effect of fluid filling on the dynamic response of corrugated sandwich beams under simulated blast loading with close-celled metallic foam projectile was systematically investigated. Deformation and failure modes as well as displacement/contact force/energy absorption histories of water-filled sandwich beams were obtained at different impact levels and compared with those of empty sandwich beams. Subsequently, a combined smoothed particle hydrodynamics-finite element (SPH-FE) model was employed to simulate the dynamic responses of water-filled sandwich beams, explore the underlying mechanisms, and assess the influence of fluid-filling and sealing material on permanent beam deflection. Good agreement was achieved between numerical simulations and experimental measurements. Under impact loading, the filled liquid provides strong interaction between fluid and sandwich components owing to its inertia and incompressibility. Fluid-filling led to not only significantly reduced permanent deflection of both face sheets but also considerably enhanced resistance of the corrugated core against plastic buckling and progressive folding
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