A comparative study of dynamic, ductile fracture initiation in two specimen configurations
 Sumit Basu,
 R. Narasimhan
 … show all 2 hide
Rent the article at a discount
Rent now* Final gross prices may vary according to local VAT.
Get AccessAbstract
In this work a single edge notched plate (SEN(T)) subjected to a tensile stress pulse is analysed, using a 2D plane strain dynamic finite element procedure. The interaction of the notch with a prenucleated hole ahead of it is examined. The background material is modelled by the Gurson constitutive law and ductile failure by microvoid coalescence in the ligament connecting the notch and the hole is simulated. Both rate independent and rate dependent material behaviour is considered. The notch tip region is subjected to a range of loading rates J by varying the peak value and the rise time of the applied stress pulse. The results obtained from these simulations are compared with a three point bend (TPB) specimen subjected to impact loading analysed in an earlier work [3]. The variation of J at fracture initiation, J _{c}, with average loading rate J is obtained from the finite element simulations. It is found that the functional relationship between J _{c} and J is fairly independent of the specimen geometry and is only dependent on material behaviour.
 Priest, A.H. (1976) Influence of strain rate and temperature on the fracture and tensile properties of several metallic materials. Proc. Intl. Conf. on Dynamic Fracture Toughness. Welding Institute, Cambridge, pp. 95111
 Cox, T.B., Low, J.R. (1974) An investigation of the plastic fracture of AISI 4340 and 18Ni200 grade maraging steels. Metall. Trans. 5: pp. 14571470
 Basu, S., Narasimhan, R. (1999) A finite element study of the effects of material characteristics and crack tip constraint on dynamic, ductile fracture initiation. J. Mech. Phys. Solids 47: pp. 325350
 Pan, J., Saje, M., Needleman, A. (1983) Localisation of deformation in rate sensitive porous plastic solids. Int J. Fracture 21: pp. 261278
 Rice, J.R., Johnson, M.A. The role of large geometry changes in plane strain fracture. In: Kanninen, M.F., Adler, A.R., Rosenfield, A.R., Jaffe, R.I. eds. (1970) Inelastic Behaviour of Solids. McGraw Hill, New York, pp. 641672
 Aravas, N., McMeeking, R.M. (1985) Finite element analysis of void growth near a blunting crack tip. J. Mech. Phys. Solids 33: pp. 2549
 Ghosal, A.K., Narasimhan, R. (1997) A finite element study of the effect of void initiation and growth on mixedmode ductile fracture. Mech. Mater. 25: pp. 113127
 Costin, L. S., Duffy, J., Freund, L. B. (1985) Fracture initiation in metals under stress wave loading conditions. Fast Fracture and Crack Arrest, ASTM STP 627: pp. 310318
 Homma, H., Shockey, D. A., Murayama, Y. (1983) Response of cracks in structural materials to short pulse loads. J. Mech. Phys. Solids 31: pp. 261279
 Owen, D., Zhuang, S., Rosakis, A. J., Ravichandran, G. (1998) Experimental determination of dynamic crack initiation and propagation fracture toughness in thin aluminium sheets. Int. J. Fracture 90: pp. 153174
 Owen, D., Rosakis, A.J., Johnson, W.L. (1998) Dynamic failure mechanisms in Berilliumbearing bulk metallic glasses. GALCIT. California Institute of Technology, Pasadena, U.S.A.
 Freund, L. B. (1990) Dynamic Fracture Mechanics. Cambridge University Press, Cambridge
 Guduru, P. R., Singh, R. P., Ravichandran, G., Rosakis, A. J. (1997) Dynamic crack initiation in ductile steels. California Institute of Technology, Pasadena, U.S.A.
 Venkert, A., Guduru, P. R., Ravichandran, G. (1998) Mechanisms of dynamic failure in NiCr steels. GALCIT, California Institute of Technology, Pasadena, U.S.A
 Gurson, A.L. (1977) Continuum theory of ductile rupture by void nucleation and growth – Part I. J. Engng. Mat. Tech. 99: pp. 215
 Basu, S., Narasimhan, R. (1996) Finite element simulation of Mode I dynamic, ductile fracture initiation. Int. J. Solids Struct. 33: pp. 11911207
 Brown, L.M., Embury, J.D. (1973) Initiation and growth of voids at second phase particles. Proc. Third Intl. Conf. on Strength of Metals and Alloys. Inst. of Metals, London, pp. 164179
 Andersson, H. (1977) Analysis of a model for void growth and coalescence ahead of a moving crack tip. J. Mech. Phys. Solids 25: pp. 217233
 Tvergaard, V. (1982) Influence of void nucleation on ductile shear fracture at a free surface. J. Mech. Phys. Solids 30: pp. 399415
 Thomason, P.F. (1990) Ductile fracture of metals. Pergamon Press, Oxford
 Chu, C.C., Needleman, A. (1980) Void nucleation effects in biaxially stretched sheets. J. Engng. Mat. Tech. 102: pp. 249256
 Needleman, A. (1988) Material rate dependence and mesh sensitivity in localization problems. Comput. Methods Appl. Mech. Engng. 67: pp. 6985
 Needleman, A., Tvergaard, V. (1994) Mesh effects in the analysis of dynamic, ductile crack growth. Engng. Fracture Mech. 47: pp. 7591
 Narasimhan, R., Rosakis, A. J. (1990) Threedimensional effects near a crack tip in a ductile threepoint bend specimen: Part IA numerical investigation. Trans. ASME J. Appl. Mech. 57: pp. 607617
 Narasimhan, R., Rosakis, A. J., Moran, B. (1992) A threedimensional numerical investigation of fracture initiation by ductile failure mechanisms in a 4340 steel. Int. J. Fracture. 56: pp. 124
 Narasimhan, R. (1994) A numerical study of static and dynamic fracture initiation in a ductile material containing a dual population of second phase particles. Engng. Fracture Mech. 47: pp. 919948
 Belytshko, T. In: Belytshko, T., Hughes, T. J. R. eds. (1983) Computational Methods for Transient Analysis. Elsevier, Amsterdampp. 1
 Nakamura, T., Shih, C. F., Freund, L. B. (1986) Analysis of a dynamically loaded threepoint bend ductile fracture specimen. Engng. Fracture Mech. 25: pp. 333339
 AlAni, A. M., Hancock, J. W. (1991) Jdominance of short cracks in tension and bending. J. Mech. Phys. Solids 29: pp. 2343
 O'Dowd, N. P., Shih, C. F. (1991) Family of cracktip fields characterized by a triaxiality parameter – I. Structure of fields. J. Mech. Phys. Solids 39: pp. 9891015
 O'Dowd, N. P., Shih, C. F. (1992) Family of cracktip fields characterized by a triaxiality parameter – II. Fracture applications. J. Mech. Phys. Solids 40: pp. 939963
 Basu, S. and Narasimhan, R. (1999). A numerical investigation of loss of crack tip constraint in a dynamically loaded ductile specimen. To appear in J. Mech. Phys. Solids.
 Kanninen, M. F. and Popelar, C. H. (1985). Advanced fracture mechanics, Oxford University Press, pp. 550–551.
 Shih, C.F. (1981) Relationship between Jintegral and the crack opening displacement for stationary and extending cracks. J. Mech. Phys. Solids 29: pp. 305326
 Title
 A comparative study of dynamic, ductile fracture initiation in two specimen configurations
 Journal

International Journal of Fracture
Volume 102, Issue 4 , pp 393410
 Cover Date
 20000401
 DOI
 10.1023/A:1007606417435
 Print ISSN
 03769429
 Online ISSN
 15732673
 Publisher
 Kluwer Academic Publishers
 Additional Links
 Topics
 Keywords

 Dynamic
 ductile fracture initiation
 finite elements
 microvoid coalescence
 specimen configuration.
 Industry Sectors
 Authors

 Sumit Basu ^{(1)}
 R. Narasimhan ^{(1)}
 Author Affiliations

 1. Department of Mechanical Engineering, Indian Institute of Science, Bangalore, 560012, India