Abstract
This paper presents experimental, analytical and numerical studies of testing O-rings specimens cut from an St 37 steel pipe. These studies are meant to determine the mechanical properties of the St 37 material and to predict the behavior of its pipes when subjected to internal pressure. This was done by applying transversely concentrated force on relatively small rings (outer diameter = 60.3 mm and the wall thickness = 3.9 mm) until the rupture of the ring. A universal tensile testing machine along with specially designed holders were used to measure the load-line displacement of the rings. In addition, formulas to determine the displacement of the loading pin were derived using the straight beam theory and the curved beam theory. Both elastic and plastic deformations were calculated and compared in the results. Furthermore, finite element analyses (FEA) were carried out using strain hardening material model, to obtain the full deformation behavior of the O-ring during testing until rupture. From the experimental results, it was possible to determine the material yield strength and modulus of elasticity. The analytically obtained results predicted the material modulus of elasticity which was in very good agreement with the published values. The FE analyses were able to predict the full behavior of the rings.
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The author/authors acknowledge the Deanship of Scientific Research at King Faisal University for the financial support under Nasher Track (Grant No. 206134).
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Deanship of Scientific Research at King Faisal University, Saudi Arabia.
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Saber, M., Ali, B. On the Determination of Material Mechanical Properties of St 37 Steel Pipes Using O-Ring Specimens. Exp Tech 45, 759–768 (2021). https://doi.org/10.1007/s40799-021-00455-3
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DOI: https://doi.org/10.1007/s40799-021-00455-3