Abstract
The (cold and hot) torsion test on cylindrical bars and the recently developed (cold) plane torsion test on thin sheet are discussed with respect to their communi ties and differences. In torsion of bars the test results are conventionally used for calculating stress and strain at the specimen surface. However, since the material properties are distorted at the surface it is recommended to calculate stress and strain at a “critical radius”, where shear stress at a given torque is almost 1ndependent of the shape of flow curve: so it can be calculated with good accuracy by a new series expansion method. The plane torsion test 1S evaluated in similar way. Sources of error as well as the uncertainty of the yield criterion are discussed.
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References
PAWELSKI, O.: Comparison of Testing Methods for Hot Formability of Metals, in: Hot Forming and Hot Formability (in German), Symp. Bad Nauheim, Deutsche Gesellschaft fur Metallkunde (DGM), Oberursel 1976
KRAUSE, U.: Comparison of Different Methods of Determining Flow Stress in Cold Forming (in German), Thesis, TH Hannover 1962
(Ed.) LANGE, K.: Metal Forming Vol. 1. Fundamentals (in German), Springer-Verlag, Berlin/Heidelberg/New York 1972
PÖHLANDT, K.: Comparison of Methods for Testing the Plastic Properties of Metallic Materials (in German), Berichte aus dem Institut für Umformtechnik, Universität Stuttgart, Nr. 80, Berlin/Heidelberg/New York/Tokyo: Springer 1984
WEBER, K.-H.: The Hot Torsion Test as a Measure of Hot Formability of Metals, Thesis, BA Freiburg 1968
STÜWE, H.-P., TURCK, H.: Z.Metallkde. 55 (1964), p. 699
BARRACLOUGH, D.R., J. Testing Eval. (JTEVA) 1 (1973), p. 220
JUFEROV, V.M.,CEJKO, I. K.: Stal in Deutsch 7 (1967), p. 493
LACH, E., PÖHLANDT, K.: J. Mech. Working Technol. 9 (1984), p. 67
PÖHLANDT, K., et. al.: Arch. Eisenhüttenwes. 55 (1984), p. 149
ORTNER, B., STÜWE, H.-P.: Dynamic Recrystallisation, in: Hot Forming and Hot Formability (in German), Symp. Bad Nauheim 1975, Deutsche Gesellschaft für Metallkunde (DGM), Oberursel 1976
MARCINIAK, Z., KOLODZIEJSKI, J.: Assessment of Sheet Metal Failure Sensitivity by Method of Torsioning the Rings, J. Proc. 7th Biennal Congr. of the IDDRG, Amsterdam, 10.-13.10. 1972, p. 61
SOWERBY, R., et al.: J. Mech. Eng. Sci. 19 (1977), p. 213
POHLANDT, K., TEKKAYA, A.E.: Arch. Eisenhüttenwes. 33 (1982), p. 421
SCHMIDT, W.: Blech Rohre Profile 25 (1978), p. 271
MEYER-NOLKEMPER, H.: Flow Curves of Metallic Materials (in German), HFF-Bericht Nr. 4, Hannoversches Institut für Fertigungsfragen, Hannover 1982
LAHOTI, G.D., ALTAN, T.: J. Engng. Mater. Technol. 47 (1974), p. 1
DAY, W.: J. Appl. Math. Mech. 28 (1975), p. 207
PÖHLANDT, K., TEKKAYA, A.E.: Metals Science, to be publ.
PÖHLANDT, K., TEKKAYA, A.E.: Determining Flow Curves of Thin Sheet Metal by Plane Torsion, in: Seminar Recent Developments in Sheet Metal Working (in German), Stuttgart, 19.-20.6.1984
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© 1985 Department of Mechanical Engineering University of Birmingham
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Pöhlandt, K., Tekkaya, A.E. (1985). Testing The Plastic Behaviour of Bars and thin Sheet by Torsion Tests. In: Tobias, S.A. (eds) Proceedings of the Twenty-Fifth International Machine Tool Design and Research Conference. Palgrave, London. https://doi.org/10.1007/978-1-349-07529-4_61
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DOI: https://doi.org/10.1007/978-1-349-07529-4_61
Publisher Name: Palgrave, London
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