Possible improvements in the analytical evaluation of necking phenomena in the axisymmetric tensile test

• Autorzy: Gromada M. , Miszuris G. , Ôchsner A.
• Konferencja: Konferencja mechaniki pękania / sympozjum (X ; 11-14.09.2005 ; Opole-Wisła, Polska)
• Języki publikacji: EN

Abstrakty

EN

This paper deals with new analytical modelling of the classical tensile test with an axisymmetric sample, determining the yield stress of elasto-plastic materials under the neck formation. Known for many years, classical Bridgman and Davidenkov-Spridinova`s formulae provide a certain terror, especially visible in the case of weakly hardening and ideal-plastic materials. Making use of our own assumptions, others than those applied earlier, and being based on deformation theory of plasticity, a new formula is derived. Its advantage in comparison with known formulae is confirmed by means of high accurate numerical simulation of tensile tests for three types of materials based on the Finite Element Method.

Słowa kluczowe

EN

neck formation; yield stress; elasto-plastic materials

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2005
• Tom: z. 82
• Strony: 91--98
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr.

Twórcy

autor

Gromada M.

• Politechnika Rzeszowska, Polska

autor

Miszuris G.

• Politechnika Rzeszowska, Polska

autor

Ôchsner A.

• University of Aveiro

Bibliografia

• [1] BRIDGMAN P.: Studies in Large Plastic and Fracture. Mc Graw-Hill. 1952.
• [2] DAVIDENKOV N. N., SPIRIDONOVA N. L: Mechanical methods of testing analysis of the state of stress in the neck of a tension test specimen. Proc Am Soc Test Mater, 1946 vol. 46, pp. 1147-1158.
• [3] ALVES M., JONES N.: Influence of hydrostatic stress on failure axisymmetric notched specimens, J Mech Phys Solids, 1999 vol. 47, pp. 643-667.
• [4] CABEZAS E. E., CELENTANO D. J.: Experimental and numerical analysis of the tensile test using sheet specimens, Finale Elem Anal, 2004 vol. 40, pp 555-575.
• [5] GROMADA M., MISHURIS G., ÓCHSNER A.: Critical analysis of the evałuation of plastic materiał properties obtained from standard round tensile specimens, Proc of 3rd Int Conf on Mathematical Modelling and Computer Simulation of Materiał Technologies MMT-2004, College of Judea and Samaria, Ariel, Israel, Sept. 06-10 2004, Section 3, pp. 78-88.
• [6] GROMADA M., MISHURIS G., OCHSNER A.: Evaluation of materul properties from axisymmetric tensile samples: remarks on error estimatŁ. 3rd Int Conf on Materials Testing TEST 2005, Nurnberg, Germany, May 10-12 2005, pp 129-134.
• [7] GROMADA M., MISHURIS G., OCHSNER A.: On the axisymmetric tensile test: are there improvements of the Bridgman and Davidenkov-Spiridonova formulae possible?, Nurnberg, Germany in print.
• [8] KACHANOV I. M.: Fundamentals of the Theory of Plasticity, 1971 North-Holland.