Volume 2, Issue 5 (May 2005)

    Progress in the Characterization of the Cutting Resistance of Protective Materials

    (Received 19 December 2003; accepted 4 October 2004)

    Published Online: 2005

    CODEN: JAIOAD

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    Abstract

    A sliding sharp edge that penetrates a material is one of the most dangerous cases of cutting because it requires the smallest applied normal load. This study aims to analyze the cutting mechanics and mechanism of protective rubber materials in the presence of friction and the effect of the material's mechanical behavior and the blade's sliding velocity on the material's cut resistance. The International Standard ISO 13997 cut test method, which consists of measuring the distance that a straight blade slides horizontally to cut through a material under a constant applied normal force, was used to investigate the cutting phenomena. In practice, the cut resistance of a material is given by the contribution of the material's intrinsic strength and the frictional distribution between the material and the blade that slides and penetrates it. This study demonstrates that two types of friction are involved in material cutting: a macroscopic friction induced by the gripping of the material and by the applied normal load on the two sides of the blade; and a sliding friction associated with cut-through of the material that occurs along the face of the blade tip. For rubber materials, commonly used in protective gloves, the adhesion force due to the gripping of the material on the blade edge could be several times greater than the friction due to the applied normal force. Thus, the cutting energy required to break the molecular chains in rubber materials is much smaller than the energy dissipated by friction. For these materials, the elastic modulus, the structure of the material, as well as the sliding velocity, have a significant effect on the friction. Therefore, all of these properties can affect the cutting resistance results. A better understanding of the cutting mechanism in protective materials is a fundamental step in developing better performing protective materials.


    Author Information:

    Vu, TBN
    Université du Québec — École de technologie supérieure, Département de génie mécanique, Montreal, Québec

    Vu-Khanh, T
    Université du Québec — École de technologie supérieure, Département de génie mécanique, Montreal, Québec

    Lara, J
    Institut de Recherche Robert Sauvé en santé et en sécurité du travail, Montréal, Québec


    Stock #: JAI12148

    ISSN: 1546-962X

    DOI: 10.1520/JAI12148

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    Author
    Title Progress in the Characterization of the Cutting Resistance of Protective Materials
    Symposium Performance of Protective Clothing: Global Needs and Emerging Markets: 8th Symposium, 2004-01-15
    Committee F23