This article is cited in 1 paper

Mechanical properties, strength physics and plasticity

Application of nonlocal criteria for destruction in problems with a nonuniform stress field

A. A. Chevrychkina, A. A. Gruzdkov, Yu. V. Petrov

Saint Petersburg State University

Abstract: The dependence of the critical load on the degree of nonuniformity of the stress field is considered on the example of polymethylmethacrylate beams and plates with a round hole or a sharp notch. It is proposed to use nonlocal criteria for brittle fracture to describe the behavior of a nonuniformly stressed material. Among the criteria considered, the structural criterion is the most universal, because, in this case, the distance parameter d is least dependent on the test configuration. The distance parameters in problems with a regular concentrator are of the same order of magnitude, as in problems with a singular stress concentrator. A further modification of the criterion that takes into account the properties of the fracture process will probably make it possible to obtain a unique value for the length parameter for any degree of nonuniformity of the stress field.

Received: 22.12.2016
Revised: 16.02.2017

DOI: 10.21883/FTT.2017.08.44760.456

 English version: Physics of the Solid State, 2017, 59:8, 1594–1599

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