STP664

    High-Speed Liquid Jet and Drop Impact on Brittle Targets

    Published: Jan 1979


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    Abstract

    Two methods are described for producing high-velocity liquid impacts. The first involves projecting a jet of liquid at a stationary target while in the second specimens are fired at suspended drops. An objective of the study was to place the jet method on a quantitative basis. Detailed studies of jets, using high-speed photography, allowed the conditions for producing stable and reproducible jets to be obtained for a range of jet velocities (up to ∼1000ms-1) and jet diameters (0.4 to 3.2 mm). The relation between jet impact and drop impact damage was achieved after experiments in which high-speed photography, pressure measuring techniques, and damage studies played important roles. The quantitative establishment of the jet method has practical implications since it has advantages in its ease of operation, its ability to simulate large drops, and in having the target stationary. Finally, a hydrostatic test apparatus for measuring the residual strength of brittle specimens following impact and examples of measurements on glasses and silicon nitride are described. Factors affecting the shape of residual strength curves are discussed.

    Keywords:

    erosion, liquid impact, rain erosion, jet method, high-speed photography, fracture, mechanical properties, residual strengths, pressure measurements, glasses, polymers, silicon nitride


    Author Information:

    Field, JE
    Physics and Chemistry of Solids, Cavendish Laboratory, Cambridge,

    Gorham, DA
    Physics and Chemistry of Solids, Cavendish Laboratory, Cambridge,

    Rickerby, DG
    Physics and Chemistry of Solids, Cavendish Laboratory, Cambridge,


    Paper ID: STP35806S

    Committee/Subcommittee: G02.10

    DOI: 10.1520/STP35806S


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