A continuum damage mechanics model for multiaxial low cycle fatigue life

• Autorzy: Zolochevsky A. , Obataya Y.

Warianty tytułu

PL

Model ciągłej mechaniki pękania dla wieloosiowej niskocyklicznej żywotności zmęczeniowej

• Konferencja: XVIth Physical Metallurgy and Materials Science Conference on Advanced Materials and Technologies AMT'2001, Gdańsk-Jurata, 16-20 September 2001
• Języki publikacji: EN

Abstrakty

EN

New multiaxial fatigue damage model based on the critical plane approach is proposed. Two different physical mechanisms of the fatigue damage development on each potential failure plane (critical plane) are considered. In general, each critical plane contains two families of parallel microcracks. The proposed model reproduces simultaneously fatigue damage induced anisotropy, the influence of positive and negative mean stresses, unilateral fatigue damage, microcrack closure effect and fatigue behaviour under variable amplitude loading. The expression for the equivalent stress in the damage evolution equation includes the stress intensity for the amplitudes as well as joint invariants for the mean values of the stress tensor and for the vectors associated with the directions of microcracks. The theoretical predictions are compared with experimental data under uniaxial cyclic loading of brass specimens. The influence of positive and negative mean stresses on the fatigue life of brass is investigated.

Słowa kluczowe

EN

continuum damage mechanics; model; fatigue life; multiaxial low cycle fatigue life; brass; loading

PL

mechanika pękania ciągłego; model; żywotność zmęczeniowa; wieloosiowa niskocykliczna żywotność zmęczeniowa; mosiądz; obciążenie

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 2001
• Tom: R. XXII, nr 5
• Strony: 993--995
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Zolochevsky A.

• Kharkov State University, Ukraine

autor

Obataya Y.

• Fukui University, Fukui, Japan

• Kharkov State University, Ukraine

Bibliografia

• [1] Bérard J. Y., McDowell D. L., Antolovich S. D.: Damage observation of a low-carbon steel under tension-torsion low-cycle fatigue. In: Advances in Multiaxial Fatigue, D. L. McDowell, R. Ellis (eds.), American Society for Testing and Materials, Philadelphia, (1993) 326-344.
• [2] Weiss J., Pineau A.: Continuous and sequential multiaxial low-cycle fatigue damage in 316 stainless steel. In: Advances in Multiaxial Fatigue, L. McDowell, R. Ellis [eds.], American Society for Testing and Materials, Philadelphia, (1993) 183-203.
• [3] Savaidis G., Seeger T.: Material behaviour and life evaluation under cyclic multiaxial proportional loading. Proc. 5 Int. Conf. on Biaxial/Multiaxial Fatigie & Fracture, Vol.1, Tech. Univ. Opole, 1997, pp. 81-98.
• [4] Sines G.: Failure of Materials under Combined Repeated Stresses with Superimposed Static Stresses. NACA TN-3495, 1954.
• [5] Robillard M., Cailletaud G.: ‘Directionally defined damage’ in multiaxial low-cycle fatigue: experimental evidence and tentative modeling. In: Fatigue Under Biaxial and Multiaxial Loading, K. Kussmaul, D. McDiarmid, D. Socie [eds.], Mechanical Engineering Publications, London, (1991) 103-130.
• [6] Shiratori E., Obataya Y.: Cyclic creep-type fracture and fatigue-type fracture in the constant –load low cycle fatigue tests. Int. J. Mech. Science (197) 433-447.