Improved method for determining the stress relaxation at the crack tip

A. V. Grinevich; V. S. Erasov; V. V. Avtaev

doi:10.1134/S0036029517100081

Improved method for determining the stress relaxation at the crack tip

Authors: Grinevich A.V.¹, Erasov V.S.¹, Avtaev V.V.¹
Affiliations:
1. All-Russia Institute of Aviation Materials VIAM
Issue: Vol 2017, No 10 (2017)
Pages: 901-904
Section: Diagnostics and Mechanical Test Techniques
URL: https://journal-vniispk.ru/0036-0295/article/view/171804
DOI: https://doi.org/10.1134/S0036029517100081
ID: 171804

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Abstract

A technique is suggested to determine the stress relaxation at the crack tip during tests of a specimen of a new type at a constant crack opening fixed by a stay bolt. The shape and geometry of the specimen make it possible to set the load and to determine the crack closure force after long-term exposure using the force transducer of a tensile-testing machine. The stress relaxation at the crack tip is determined in a V95pchT2 alloy specimen at elevated temperatures.