Issue 29

S.K. Kudari et alii, Frattura ed Integrità Strutturale, 29 (2014) 419-425; DOI: 10.3221/IGF-ESIS.29.37 425 (iii) The proposed formulation, Eq. (5) is more simple than the one proposed by Kwon and Sun [5] given in Eq. (4), which needs magnitude of K computed by 2D FE analysis. The proposed Equation can be readily used to evaluate the maximum K I in a SENB specimen by knowing only applied stress, specimen thickness ( B ) and a/W A CKNOWLEDGEMENT uthors gratefully acknowledge the computational facilities provided by Research Center, B. V. B. College of Engineering & Technology, Hubli, and ProSim, Bangalore. R EFERENCES [1] Murakami, Y., Stress Intensity Factors Hand Book, Pergamon Press, Oxford, (1987). [2] Fett, T., Stress Intensity and T- stresses for internally cracked circular disks under various conditions, Engineering Fracture Mechanics, , 68 (2001) 1119-1136. [3] Chen, Y.Z., Lin, X.Y., On dependence of the stress intensity factor and T-stress from imposed boundary conditions in a rectangular cracked plate, Computational Materials Science, 42 (2008) 149-55. [4] Yihua, L., Zhigen, W., Yongcheng, L., Xiaomei, L., Numerical methods for determination of stress intensity factors of singular stress field, Engineering Fracture Mechanics, 75 (2008) 4793–4803. [5] Kwon, S.W., Sun, C.T., Characteristics of three-dimensional stress fields in plates with a through –the-thickness crack, International Journal of Fracture, 104 (2000) 291-315. [6] Moreira, P.M.G.P., Pastrama, S.D., Castro, P.M.S.T., Three-dimensional stress intensity factor calibration for a stiffened cracked plate, Engineering Fracture Mechanics, 76 (2009) 2298–2308. [7] ABAQUS User’s Manual. Version 6.5-1. Hibbitt, Karlsson & Sorensen, Inc. (2004). [8] ASTM Standard E1820-13, Standard Test Method for Measurement of Fracture Toughness, American Society for Testing and Materials, Philadelphia, Pennsylvania (2013). [9] Jie, Q., Xin, W., Solutions of T-stresses for quarter-elliptical corner cracks in finite thickness plates subject to tension and bending, International Journal of Pressure Vessels and Piping, 83 (2006) 593–606. [10] Kim, Y., Zhu, X.K., Chao, Y.J., Quantification of constraint on elastic-plastic 3D crack front by the J-A 2 three-term solution, Engineering Fracture Mechanics, 68 (2001) 895-914. [11] Coutin, S., Gardin, C., Bezine, G., Ben Hadj Hamouda, H., Advantages of the J-integral approach for calculating stress intensity factors when using the commercial finite element software ABAQUS, Engineering Fracture Mechanics, 72 (2005) 2174-2185. [12] Kudari, S.K., Kodancha, K.G., Effect of Specimen Thickness on Plastic Zone, In: 17 th European Conference on Fracture (ECF-17), (2008). [13] Sherry, A.H., France, C.C., Edwards, L., Compendium of T-stress solutions for two and three dimensional geometries, Fatigue and Fracture of Engg Mat and Structures, 18 (1995) 141-155. [14] Kudari, S. K., Maiti, B., Ray, K. K., The effect of specimen geometry on plastic zone size: a study using the J integral. Journal of Strain Analysis, 42 (2007) 125-136. [15] Saxena, A., Nonlinear fracture mechanics for engineers, CRC Press, Boca Raton, Florida (1997), pp. 51–52 [16] Kodancha., K.G., Kudari., S. K., Variation of stress intensity factor and elastic T-stress along the crack-front in finite thickness plates. Frattura ed Integrità Strutturale, 8 (2009) 45-51. [17] Fernandez, Z.D., Kalthoff, J.F., Fernandez, C.A., Canteli, A., Grasa , J., Doblare, M., Three dimensional finite element calculations of crack-tip plastic zones and K IC specimen size requirements, In: 15 th European Conference on Fracture (ECF-15), (2005). [18] Nakamura, T., Parks, D.M., Three-dimensional stress field near the crack -front of a thin elastic plate, Journal of applied Mechanics, 55 (1988) 805-813. A