Blast attacks due to land mines and explosives have raised serious concerns in recent years due to the fatal injury and catastrophic damage they have caused in the war zones and homeland. The ultimate goal of this project is to improve the design of lightweight manned ground vehicles to fight against antitank landmines and explosives. Owing to their lightweight and complex damage process, fiber-reinforced composite materials have been found to have higher energy absorption capability and can generate less lethal debris than conventional metals when subjected to blast loading. In order to characterize the blast resistance of composite materials, a pistonassisted shock tube has been modified for simulating blast and ballistic impact tests due to its high safety, controllability, repeatability, accessibility with low cost. Although real blasts can be performed relatively easily by using TNT or other explosive chemicals, they, however, cannot be done in general laboratories like many material and structure testing machines due to their potential danger and restriction, hence hindering the developement of new armor materials for fighting against blast attacks. By carefully controlling the types of input gases and their pressure levels and the profile of pressure wave, the piston-assisted shock tube testing facility has been found to be able to simulate various blast waves up to some extent when compared with computational fluid dynamic analysis and a real blast test. Besides achieving high fidelity for blast loading, a measuring technique capable of recording the deformation history of specimens during blast loading is also critically important to the success of the blast simulation technique. Tests on several composites, including laminated woven composite plates and beams, have been explored. Both fixed boundary condition and simply supported boundary condition have been enhanced to meet the highly dynamic blast conditions. The experimental results have shown the feasibility of the laboratory based facility for screening materials and structures for lightweight armors.


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    Titel :

    Response of composite materials to high pressure waves


    Weitere Titelangaben:

    Verwendung von Compositwerkstoffen für Schockwellenbelastung


    Beteiligte:
    Liu, D. (Autor:in) / Li, G. (Autor:in) / Raju, B. (Autor:in)


    Erscheinungsdatum :

    2009


    Format / Umfang :

    10 Seiten, 8 Bilder, 6 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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