Influence of MESH morphology near the notch on precision of SCF determination

• Autorzy: Cichański A.
• Języki publikacji: EN

Abstrakty

EN

The researches considered the problem of mesh forming for numerical analyses of notched elements. Stress concentration factor Kt was assumed as the characteristic value determined during the calculations. The calculations were performed for flat bars with opposite U-shaped notches and for round bars with V-shaped notches. Both analysed the notchs generally assumed as shallow notch Kt.1.7 and sharp notch Kt.2.8. Two-dimensional FEM linear elastic analyses were performed in the ANSYS software environment. For the purpose of the analyses, free and mapped meshes for coarse geometry and mapped meshes for modified geometry with one and two subareas were assumed. It has been revealed that precision of numerical calculations for stress concentration factor depends on morpholology of the mesh located near the notch. It has been revealed that free mesh enables to obtain a satisfying precision of the calculations. Introduction of division in formed geometry of the notch for sub-areas followed by their division according to the standard did not improve precision.

Słowa kluczowe

EN

notch; local approach; stress concentration factor; finite element mesh

• Wydawca: Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology
• Czasopismo: Journal of Polish CIMAC
• Rocznik: 2010
• Tom: Vol. 5, no 2
• Strony: 55--63
• Opis fizyczny: Bibliogr. 9 poz., rys., tab.

Twórcy

autor

Cichański A.

• University of Technology and Live Sciences in Bydgoszcz ul. Kaliskiego 7, 85-796 Bydgoszcz, Poland tel.: [phone], fax: [phone],

Bibliografia

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• [2] Fatemi, A., Zeng, Z., Plaseied, A., Fatigue behavior and life predictions of notched specimens made of QT and forged microalloyed steels, Int. J. Fatigue, 26, 2004, 663-672.
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• [5] Noda, N.A., Sera, M., Takase, Y., Stress concentration factors for round and flat specimens with notches, Int. J. Fatigue, Vol. 17, No. 3, 1995, pp.163-178.
• [6] Noda, N.A., Takase, Y., Stress concentration formula useful for all notch shape in a round bar (comparison between torsion, tension and bending), Int. J. Fatigue, Vol. 28, No. 2, 2006, pp.151-163.
• [7] Pilkey, W.D., Pilkey, D.F., Peterson’s stress concentration factors, John Wiley & Sons, Inc., 2008.
• [8] Stephens, R.I., Fatemi, A., Stephens. R.R., Fuchs H.O., Metal Fatigue in Engineering, 2nd Edition, John Wiley&Sons, Inc., 2001,
• [9] Zeng, Z., Fatemi, A., Elasto-plastic stress and strain behaviour at notch roots under monotonic and cyclic loadings, J. of Strain Analysis, Vol. 36, No 3, 2001, 287-300.