Three types of polycrystalline graphites, the size of which is 65 mm in diameter and 30 mm in thickness, are impacted by a 4 mm diameter steel sphere accelerated from 1200 m/s to 1900 m/s. Spallation on the back-surface of them were observed by a high speed shutter camera. After ejection of smaller fragments from the central parts, larger fragments of periphery are ejected. The fracture behavior depends on specimen's properties or microstructures. When the projectile does not penetrate through the specimens, specimen shows different fracture. The penetration of a projectile must play an important role on crack initiation and on fragment ejection. Spall area could be affected by graphite's particle size and their effective fracture energy.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren




    Dynamic fracture toughness and Charpy impact properties of wheel and axle materials for high speed train

    Kwon, S. J. / Ito, Y. / Ogawa, K. et al. | British Library Conference Proceedings | 2003


    High-speed Video Observation of Engine Oil Aeration

    Manz, D. L. / Cowart, J. S. / Cheng, W. K. | SAE Technical Papers | 2004


    High-speed video observation of engine oil aeration

    Manz,D.L. / Cowart,J.S. / Cheng,W.K. et al. | Kraftfahrwesen | 2004


    Fracture Mechanisms of Composite Materials under Hypervelocity Impact

    Katz, S. / Grossman, E. / Gouzman, I. et al. | British Library Conference Proceedings | 2006