Von mises stress distribution along the cruciform specimen under biaxial loading: geometric variation effect

Von mises stress distribution along the cruciform specimen under biaxial loading: geometric variation effect

Abdul Mateen Mohammed, Jaya KandaSamy, Bhavani Venkata Yashwanth Dasari, Lingala Syam Sundar

Abstract. The aim of this work is to optimize the geometry of the cruciform specimen required for in-plane biaxial testing where the failure has to occur in the central gauge region. The specimen has three different zones with three different thickness, i.e., (i) along the arm, (ii) Milled region and (iii) along the central gauge region. The geometric variables in the specimen are the radii at four different locations in the geometry (i) central gauge (ii) radius of the slots milled along the arm, corner radius at (iii) Milled region and (iv) at the intersection of arms. The Taguchi method was realized for the design of experiments considering these four factors varied at three level. However, the effect of the variation in the thickness was studied independently. During which the thickness at the central region was maintained constant to 0.7mm, whereas the thickness at the other two positions were varied from 3 mm to 3.5mm and 1 to 1.5 mm respectively. In the first set of experiments the Von Mises stress was maximum at the gauge section along with a portion of it also being appearing along the milled region on the arm of the specimen. However, for the second set of experiments the maximum stress occurred along the gauge region for the three geometries. Later, Taguchi analysis indicated the radius of the slots milled along the arm is the prime statistically influencing factor and the radius at the interface of the arm section is the second statistically influencing factor. Whereas the other two radii are found to be statistically non-influencing factor when considered individually. However, a strong interaction has been observed between all the four parameters.

Keywords
Biaxial Stress, Cruciform Specimen, Taguchi, Stress-Strain

Published online 8/10/2023, 13 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Abdul Mateen Mohammed, Jaya KandaSamy, Bhavani Venkata Yashwanth Dasari, Lingala Syam Sundar, Von mises stress distribution along the cruciform specimen under biaxial loading: geometric variation effect, Materials Research Proceedings, Vol. 31, pp 385-397, 2023

DOI: https://doi.org/10.21741/9781644902592-40

The article was published as article 40 of the book Advanced Topics in Mechanics of Materials, Structures and Construction

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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