Effect of hardening induced by cold expansion on damage fatigue accumulation and life assessment of aluminium alloy 2024

• Autorzy: Bouguenna B. , Aid A. , Bendouba M. , Benguediab M. , Amrouche A.
• Konferencja: Conference on Fracture Mechanics (XIII ; 5-7.09.2011 ; Opole ; Polska)
• Języki publikacji: EN

Abstrakty

EN

Hole cold expansion (HCE) is an effective method to prolong the fatigue life of mechanical structures because it introduces residual compressive tangen- tial stresses around the expanded hole. The enhancement method of fatigue life and the crack initiate and growth behavior of a holed specimen was investigated by using the 2024 Aluminum alloy. The purpose of present study is to propose a simple technical method for enhancement of fatigue life in a hole cold expansion of pre-cracked spec- imen. Fatigue damage accumulation of cold expanded hole in aluminum alloys used in land transportation components was investigated. Tests were carried out using pre-cracked SENT specimens. Tests were performed in two and four block loading under constant amplitude. Two sequences were com- pared. The increasing and the decreasing magnitude were compared. The experi- mental results were compared to the damage calculated by the Miner's rule and a new simple fatigue damage indicator. This comparison shows that the ‘model of the mage stress’, which take into account of the loading history, yields a good estimation of the experimental results. Moreover, the error is minimized in comparison to the Miner's model.

Słowa kluczowe

EN

aluminium alloys; fatigue damage; fatigue life; residual stress

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2011
• Tom: z. 99
• Strony: 18--19
• Opis fizyczny: Bibliogr. 5 poz.

Twórcy

autor

Bouguenna B.

autor

Aid A.

autor

Bendouba M.

autor

Benguediab M.

autor

Amrouche A.

• Laboratoire LPQ3M, BP 305, Université de Mascara, Algérie,

Bibliografia

• [1] AID A.: Thèse de Doctorat, Universitè de Sidi-Bel Abbes, Algérie, 195(2006) (in French)
• [2] MESMACQUE G., GARCIA S. AND AMROUCHE A.: Sequential law in multiaxial fatigue: a new damage indicator. Int. J. Fatigue 27, 2005, pp 461-467
• [3] AID A., SEMARI Z., AMROUCHE A., MESMACQUE G., BENGUEDIAB M.: Non linear damage cumulative criterion on fatigue under random loading. Alg. J. Adv. Mat, 2006
• [4] AMROUCHE A., SU M., AID A., MESMACQUE G.: Numerical study of the optimum degree of cold expansion: Application for the pre- cracked specimen with the expanded hole at the crack tip, J. Mat. Proc. Tech., 197, 2008, pp 250-254
• [5] AID A., AMROUCHE A., BACHIR BOUIADJRA B., BENGUEDIAB M., MESMACQUE G.: Fatigue life prediction under variable loading based on a new damage model , Materials & Design, 32, 2011, pp183- 191