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  • 1.
    Stigh, Ulf
    University of Skövde, School of Technology and Society.
    Continuum Damage Mechanics and the Life-Fraction rule2006In: Journal of applied mechanics, ISSN 0021-8936, E-ISSN 1528-9036, Vol. 73, no 4, p. 702-704Article in journal (Refereed)
    Abstract [en]

    This paper gives a short review of two different methods for life prediction at high temperature; namely continuum damage mechanics (CDM) and the linear life-fraction rule (LFR). It is well known that the class of CDM theories with a separable evolution law gives a life prediction in accordance with the LFR. However, it appears to be an open question if this is a necessary condition. It is here shown that in order for a CDM theory to comply with the LFR it must have a separable evolution law. That is, if we can assume that a material follows the LFR, it is necessary to chose a separable evolution law for this material. The reverse is also true, to get a life-fraction different from unity, we must chose a nonseparable evolution law.

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