Numerical and Analytical Modelling of Elastic-Plastic Fracture Mechanics Parameters

Abstract:

Article Preview

Structural integrity and service reliability depend on the fracture resistance of a material. Cracks in the material are the locations of stress concentration, and elastic-plastic deformation can occur causing the development of mixed-mode type of fracture ahead the crack tip. Crack behavior in the elastic-plastic region is analyzed applying numerical and analytical simulation based on fracture mechanics parameters, characterizing the response of the material at the crack tip. Numerical and analytical results are compared with the corresponding experimental results obtained in previously performed fracture mechanics tests with standard single-edge notch bending – SEN(B) specimens. The comparison shows an acceptable level of agreement, enabling application of the proposed numerical model of crack growth in the mixed-mode fracture analysis for structural integrity assessment.

Info:

Periodical:

Edited by:

Dragan P. Uskoković, Slobodan K. Milonjić and Dejan I. Raković

Pages:

565-570

Citation:

L. Milović et al., "Numerical and Analytical Modelling of Elastic-Plastic Fracture Mechanics Parameters", Materials Science Forum, Vol. 555, pp. 565-570, 2007

Online since:

September 2007

Export:

Price:

$38.00

[1] Č. Primec: Elasto-plastične analize lomne mehanike upogibnih preizkušancev splitvo raspoko, Ph. D. thesis (Technical Faculty, Maribor, Slovenia 1996).

[2] C.F. Shih and V. Kumar: Estimation Technique for the Prediction of Elastic-Plastic Fracture of Structural Components of Nuclear Systems, 1 st Semi annual Report to EPRI, Contract N o RP1237-1, General Electric Company, Schenectady, New York, July 1, 1978-January 31, (1979).

[3] H. Tada, P.C. Paris and G.R. Irwin: The Stress Analysis of Crack Handbook (Del Research Corporation, Hellertown, Pennsylvania 1973).

[4] Lj. Milović: Numerical and Experimental Defining of the Parameters in Elastic-plastic Fracture Mechanic, M. Sc. thesis (Faculty of Mechanical Engineering, Belgrade, Serbia 1999) (in Serbian).

[5] Recommendation for the use of finite elements in fracture mechanics, ESIS Newsletter N o 15, (1993).

[6] A. Sedmak: Application of the Fracture Mechanic on the Construction Integrity, the monograph (Faculty of Mechanical Engineering, Belgrade, Serbia 2003) (in Serbian).