Vol. 3, No. 9, 2008

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ISSN: 1559-3959
Determination of strain gage locations for the accurate measurement of opening mode stress intensity factors

B. Kaushik, K. S. R. K. Murthy and P. S. Robi

Vol. 3 (2008), No. 9, 1757–1771
Abstract

The accuracy of measurement of opening mode stress intensity factors using the strain gage techniques largely depends on location of the gages. The radial position of the strain gages is a major issue in measurement of the stress intensity factors. This paper describes an approach to resolve this problem. The present work proposes a method for practically accurate determination of a vital parameter designated as (rmax) which in turn is extremely useful in judging the valid positions of the strain gages. The results of the present investigation clearly show that the proposed method is simple and accurate values of rmax can be determined.

Keywords
stress intensity factors, cracks, fracture, strain gage, finite element analysis
Milestones
Received: 18 August 2008
Revised: 7 September 2008
Accepted: 22 September 2008
Published: 1 November 2008
Authors
B. Kaushik
Tata Motors Limited
Pune
India
K. S. R. K. Murthy
Department of Mechanical Engineering
Indian Institute of Technology Guwahati
Guwahati - 781 039
Assam
India
P. S. Robi
Department of Aerospace Engineering
Indian Institute of Space Science and Technology
Thiruvananthapuram - 695 022
India