Issue 37

Y. Wang et alii, Frattura ed Integrità Strutturale, 37 (2016) 241-248; DOI: 10.3221/IGF-ESIS.37.32 247 Fatigue lifetime prediction The predicted versus experimental fatigue lifetime diagram determined via Procedure A is reported in Fig. 5. The predicted vs experimental fatigue lifetime diagram obtained through Procedure B is reported in Fig. 6. Finally, Fig. 7 shows the predicted vs experimental fatigue lifetime diagram determined using Procedure C. As it can be seen from Figs. 5, 6 and 7, all the data fall within an error scatter band of 3. C ONCLUSIONS 1. Both the MVM and the MDM can predict the orientation of the critical plane satisfactorily. The MVM is more efficient from a computation point of view. 2. Satisfactory fatigue lifetime predictions are obtained by using Procedure A, B and C. 3. The MVM can be applied with FS criterion successfully to predict fatigue lifetime for metallic materials undergoing VA multiaxial fatigue loading. A CKNOWLEGEMENTS he Aviation Science Funds of China (No.: 2013ZA52008) and the National Natural Science Foundation of China (No.: 10702027) are acknowledged for supporting the present research work. R EFERENCES [1] Socie, D.F., Marquis, G.B., Multiaxial Fatigue, SAE, Warrendale, PA. (2000). [2] Wang, Y., Susmel, L.,Critical plane approach to multiaxial variable amplitude fatigue loading, Fracture and Structural Integrity, 33(2015) 345-356. [3] Smith, K.N., Watson, P., Topper, T.H., A stress-strain function for the fatigue of metals, J. Mater., 5(1970) 767-776. [4] [2] Brown M.W., Miller K.J., A theory for fatigue under multiaxial stress-strain conditions, In: Proc institution of mechanical engineering, 187 (1973)745-56. [5] Kandile, F.A., Brown, M.W., Miller, K.J., Biaxial low-cycle fatigue fracture of 316 stainless steel at elevated temperature, Met. Soc. Lond., 280 (1982) 203-210. [6] Fatemi A., Socie D.F., A critical plane approach to multiaxial fatigue damage including out-of-phase loading, Fatigue Fract Eng Mater Struct, 11 (1988) 149-65. [7] Susmel L., Meneghetti G., Atzori B., A simple and efficient reformulation of the classical Manson-Coffin curve to predict lifetime under multiaxial fatigue loading-Part I: plain materials, Journal of Engineering Materials and Technology, 131 (2009) 021009-1-021009-9. [8] Wang, Y., Susmel, L., The modified Manson-Coffin Curve Method to estimate fatigue lifetime under complex constant and variable amplitude multiaxial fatigue loading, Int. J. Fatigue, 83(2016) 135-149. [9] Marciniak, Z., Rozumek, D., Macha, E., Verification of fatigue critical plane position according to variance and damage accumulation methods under multiaxial loading, Int. J. Fatigue, 58 (2014) 84-93. [10] Susmel L., A simple and efficient numerical algorithm to determine the orientation of the critical plane in multiaxial fatigue problems, Int. J. Fatigue, 32 (2010) 1875-1883. [11] Susmel, L., Tovo, R., Socie, D.F., Estimating the orientation of Stage I crack paths through the direction of maximum variance of the resolved shear stress, Int. J. Fatigue, 58 (2014) 94-101. [12] Matsuishi, M., and Endo, T., Fatigue of metals subjected to varying stress, Presented at Japan Society of Mechanical Engineers, Fukuoka, Japan, (1968). [13] Bannantine, J.A., Socie, D.F., A multiaxial fatigue life estimation technique, In: M.R. Mitchel, R.W. Landgraf (Eds.), ASTM symposium on advances in fatigue lifetime predictive techniques, ASTM STP 1122, American Society for Testing and Materials, Philadelphia, (1991) 249-75. [14] Wang C.H., Brown M.W., Life prediction techniques for variable amplitude multiaxial fatigue – part I: theories, Trans. ASME, J. Eng. Mater. Technol., 118 (1996) 367–70. T