Abstract
Isochronous creep rupture curves for damaged materials in the plane state of stress are investigated. The creep rupture criterion proposed by Litewka [6, 8] in terms of damage evolution equation and yield criterion were used. The isochronous curves of Nimonic 80A show that even for the same material limit curves are varying and their shape depends on the load level.References
1. D.R .Hayhurst, Creep rupture under multi-axial states of stress, J. Mech. Phys. Solids, 20, 381-390, 1972.
2. W.A.Trąmpczyński, D.R. Hayhurst, F.A. Leckie, Creep rupture of copper and aluminium under non-proportional loading, J. Mech. Phys. Solids, 29, 5/6, 353-374, 1981.
3. M. Chrzanowski, J. Madej, Budowa krzywych granicznych w oparciu o koncepcje parametru uszkodzenia, Mech. Teoret. i Stos., 4, 18, 588-601, 1980 [in Polish].
4. M. Chrzanowski, J.Madej, Isochronous creep rupture curves in plane stress, Mech. Res. Comm., 7, 1, 39-40, 1980.
5. M. Chrzanowski, J. Madej, Creep rupture of an annular plate, Trans. 8th Int. Conf. SMIRT Brussels, L6/10, 323-328, 1985.
6. A. Litewka, Creep rupture of metals under multi-axial state of stress, Arch. Mech., 41, 1989, [in press].
7. A. Litewka, Analytical and experimental study of fracture of damaging solids, in: Yielding, Damage and Fracture of Anisotropic Solids, J.P. Boehler, ed. Mechanical Engin. Publ., London.
8. A. Litewka, J. Hult, One parameter CDM model for creep rupture prediction, Eur. J. Mech., A/Solids, 8, 3, 185-200, 1989.
9. A. Litewka, On stiffness and strength reduction of solids due to crack development, Eng. Frac. Mech., 25, 5/6, 637-643, 1986.
10. A. Litewka, E. Rogalska, Yield criterion for materials with oriented structure, Proc. 5th Nat. Congr. Theor. Appl. Mech., Varna 1985, Publ. House B.A.S., Sofia, 2, 378¬383, 1985.
11. B.F. Dyson, D. McLean, Creep of Nimonic 80A in torsion and tension, Met. Sci., 11, 2, 37-45, 1977.
2. W.A.Trąmpczyński, D.R. Hayhurst, F.A. Leckie, Creep rupture of copper and aluminium under non-proportional loading, J. Mech. Phys. Solids, 29, 5/6, 353-374, 1981.
3. M. Chrzanowski, J. Madej, Budowa krzywych granicznych w oparciu o koncepcje parametru uszkodzenia, Mech. Teoret. i Stos., 4, 18, 588-601, 1980 [in Polish].
4. M. Chrzanowski, J.Madej, Isochronous creep rupture curves in plane stress, Mech. Res. Comm., 7, 1, 39-40, 1980.
5. M. Chrzanowski, J. Madej, Creep rupture of an annular plate, Trans. 8th Int. Conf. SMIRT Brussels, L6/10, 323-328, 1985.
6. A. Litewka, Creep rupture of metals under multi-axial state of stress, Arch. Mech., 41, 1989, [in press].
7. A. Litewka, Analytical and experimental study of fracture of damaging solids, in: Yielding, Damage and Fracture of Anisotropic Solids, J.P. Boehler, ed. Mechanical Engin. Publ., London.
8. A. Litewka, J. Hult, One parameter CDM model for creep rupture prediction, Eur. J. Mech., A/Solids, 8, 3, 185-200, 1989.
9. A. Litewka, On stiffness and strength reduction of solids due to crack development, Eng. Frac. Mech., 25, 5/6, 637-643, 1986.
10. A. Litewka, E. Rogalska, Yield criterion for materials with oriented structure, Proc. 5th Nat. Congr. Theor. Appl. Mech., Varna 1985, Publ. House B.A.S., Sofia, 2, 378¬383, 1985.
11. B.F. Dyson, D. McLean, Creep of Nimonic 80A in torsion and tension, Met. Sci., 11, 2, 37-45, 1977.
