Brittle fracture materials in development "narrow" isolated defects
UDC
539.375Abstract
We obtain a macroscopic criterion of brittle fracture in the formation of an isolated defect in the form of "narrow" reveals cracks (undercut) in two cases: in the first conformal mapping of the exterior of the unit circle on a plane with a defect in the form of the undercut is given a rational function; and the second is like a conformal segment display given by power series. It is shown that in both cases, the limit curve is identical to the case where a defect is defined "narrow ellipse". At the same crack as focused or perpendicular tensile stress or compressive stress along. Hence it is that the shape and geometrical properties "quite narrow" isolated defect does not affect the values of critical loads required for the start of its development. Proposed in the criterion allows to evaluate the strength of the various brittle materials under the single static load at a constant temperature of experience.
Keywords:
brittle fracture materials, development isolated defects, form isolated defects, fracture limit curve, drop-crackReferences
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Copyright (c) 2015 Dunaev V.I., Moldavanov S.Yu., Lozovoy S.B., Georgiyadi V.G.
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