STP664: Damage Mechanisms in Polymers and Composites Under High-Velocity Liquid Impact

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

    Matthewson, MJ
    Physics and Chemistry of Solids, Cavendish Laboratory, Cambridge,

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

    Pages: 23    Published: Jan 1979


    Abstract

    This paper presents results from recent liquid impact studies of a variety of glass and carbon fiber reinforced and nonreinforced thermoplastic and thermosetting polymers. Basic damage modes from single impacts in the velocity range 500 to 1000 m s-1 are described and the mechanisms of failure are analyzed. The thermosetting resins studied are essentially brittle, in contrast to the very ductile thermoplastics, and these fundamental differences are emphasized when fibrous reinforcement is added. The effects of matrix properties, reinforcement geometry, the condition of the impacted surface, and impact angle are illustrated and discussed. The main conclusion is that, although no ideal solution exists to withstand all impact situations, it is possible to establish general rules which assist in the design of composites for specific purposes. In particular, reinforced thermoplastic resins are found to have considerable advantages over reinforced thermosetting resins for many practical situations, particularly when the postimpact material strength needs to be maximized.

    Keywords:

    erosion, rain erosion, impingement, impact, liquid impact, composite materials, fiber reinforcement, glass fibers, carbon fibers, polymers, thermoplastics, thermosets


    Paper ID: STP35807S

    Committee/Subcommittee: G02.10

    DOI: 10.1520/STP35807S


    CrossRef ASTM International is a member of CrossRef.