Abstract
Stress intensity factors as a function of time near interacting cracks during creep in plates made of linear viscoelastic materials are investigated. The interaction of collinear as well as parallel cracks disposed on different levels perpendicular to the tensile stress was studied. It was found that during interaction of collinear cracks, the stress intensity factor K1(t) grew in creep and varied mainly due to the change in the distance between the tips of interacting cracks. There was practically no increase in the length of the crack. During interaction of parallel cracks, the value of K1(t) decreased slightly in time, which was also due to an increase in the distance between the tips of the cracks in creep.
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References
R. A. Shepery, “Viscoelastic behavior of composite materials”, in: Mechanics of Composite Materials [in Russian], Mir, Moscow (1978), pp. 102–195.
P. S. Theocaris and C. P. Spyropoulos, “Photoelastic determination of complex stress intensity factors for slant cracks under biaxial loading with higher-order term effects”, Acta Mech.,48, 57–70 (1983).
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Institute of Mechanics, Lomonosov Moscow State University, Moscow, Russia. Translated from Mekhanika Kompozitnykh Materialov, Vol. 34, No. 5, pp. 643–650, September–October, 1998.
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Netrebko, V.P. Investigation of stress intensity factors near interacting cracks in linear viscoelastic plates. Mech Compos Mater 34, 457–462 (1998). https://doi.org/10.1007/BF02254709
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DOI: https://doi.org/10.1007/BF02254709