High-speed photographic study of impact on fibers and woven fabrics

John E. Field; Q. Sun

doi:10.1117/12.23993

1 April 1991 High-speed photographic study of impact on fibers and woven fabrics

John E. Field, Q. Sun

Proceedings Volume 1358, 19th Intl Congress on High-Speed Photography and Photonics; (1991) https://doi.org/10.1117/12.23993
Event: 19th International Congress on High-Speed Photography and Photonics, 1990, Cambridge, United Kingdom

Abstract

The paper describes a study of the behaviour of fibres and woven fabrics when impacted at velocities in the range up to - l000m 1. The projectiles, typically steel balls of 2 or 5mm diameter, were accelerated by a double diaphragm gas gun which allowed velocities to be controlled within a few metres per second. The impact events were viewed using high-speed photography. Photography at microsecond framing intervals was made using an image converter camera (the Hadland Imacon). This camera was triggered when the projectile interrupted a laser beam positioned just in front of the specimen. In experiments with single fibres, it was possible to measure the transverse wave speeds. Experiments were made with a number of fibre materials covering a wide range of moduli and strength properties. A number of experiments were also made with woven fabrics of different densities and laminates. The velocity range covered included non-penetrating and penetrating events. The fibre materials which had the best ballistic performance were those which combined a high dynamic modulus with the ability to reach large strains before failure. The high modulus is important since it affects both the strength and the stress wave velocities. If a material has high wave velocities it can spread the load onto other fibres and layers more quickly which is beneficial.

Citation Download Citation

John E. Field and Q. Sun "High-speed photographic study of impact on fibers and woven fabrics", Proc. SPIE 1358, 19th Intl Congress on High-Speed Photography and Photonics, (1 April 1991); https://doi.org/10.1117/12.23993

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