Engineering Transactions, 49, 1, pp. 89–98, 2001
10.24423/engtrans.575.2001

Yield Surfaces and Criteria of Plastic Yielding for a Strain Hardening Material. Part 1. Experimental Study

J. Miastkowski
Polish Academy of Sciences
Poland

R. Szczebiot
Polish Academy of Sciences
Poland

The paper presents the results of experimental investigations of yield surfaces and plastic yield criteria for an aluminium alloy under complex loading. Experiments were performed on flat specimens (cut out of a sheet of metal) under uniaxial tension or compression. The proposed methodology has allowed to determine simultaneously two characteristic sections of the yield load surfaces. The first of these sections lies in the region of tensile stress while the second one is within the compressive stress area. Then, these two sections have enabled us to describe the position and dimensions of the whole yield surface in the stress space. Tests were carried out at first for the material in the initial state and then in three other states of this material obtained under different plastic prestrains. Such a procedure allowed us to determine the quantitative changes in the yield surfaces dimensions and the position of their centres as a function of plastic prestrains.
Full Text: PDF
Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).

References

R. SZCZEBIOT, Analysis of strain hardening of aluminium alloy prestrained under complex state of stress [in Polish], A doctoral thesis, IPPT PAN, Warszawa 1989.

W. SZCZEPIŃSKI, On the effect of plastic deformation on yield condition, Arch. Mech. Stosow., 15, 2, 275–296, 1963.

J. MIASTKOWSKI, Methodology of static experimental investigations of metal plastic yield [in Polish], Mech. Teoret. i Stosow., 2, 13, 225–252, 1975.

J. MIASTKOWSKI, W. SZCZEPIŃSKI, An experimental study of yield surfaces of prestrained brass, Int. J. Solids Structures, 1, 189–194, 1965.

J. MIASTKOWSKI, Analysis of the memory effect of plastically prestrained material, Arch. Mech. Stosow., 3, 20, 261–277, 1968.

H. SKROCKI, Analysis of the yield surface rotation with regard to material memory [in Polish], Mech. Teoret. i Stosow., 2/3, 21, 403–416, 1983.

W. SZCZEPIŃSKI, K. TURSKI, On the lines of influence of plastic deformation, Arch. Mech. Stosow., 21, 1, 49–57, 1969.

P.M. NAGHDI, F. ESSENGERG, W. KOFF, An experimental study of initial and subsequent yield surfaces in plasticity, J. Appl. Mech., 25, 201–209, 1958.

E. SHIRATORI and K. IKEGAMI, Experimental study of the subsequent yield surface by using cross shaped specimen, J. Mech. Phys. Solids, 16, 373–394, 1968.

Z. MRÓZ, On the description of anisotropic workhardening, J. Mech. Phys. Solids, 15, 163175, 1967.

L. DIETRICH, K. TURSKI, The new method of investigation of thin sheets under compression [in Polish], Engng. Trans., 26, 91–99, 1978.

G. SOCHA, Change of metal plastic anisotropy in time [in Polish], IPPT PAN 21/1995. Received August 31, 2000.




DOI: 10.24423/engtrans.575.2001