Study of the Formation of Lamellar Cracks

• Autorzy: Jaroniek M. , Niezgodziński T.
• Języki publikacji: EN

Abstrakty

EN

In rolled sheets, non-metallic inclusions are distributed along the thickness of the sheet as narrow lines running parallel to the rolling direction. Such inclusions are the nuclei of lamellar cracks. This work presents the application of the numerical method for study of lamellar cracking. Numerical models of samples with long artificial fissures set in the area of the sheet axis were studied along with other encountered inclusion distributions. Changes in the stress state in the area of the inclusion were observed as the load increased. Stress concentration leads to the formation of lamellar cracks - the joining of voids in the direction parallel to the exterior surface of the sheet (so-called "terraces" are formed) and at angles (so-called "jogs" are formed). The results of experimental tests were compared with the results of numerical calculations using the finite element method.

Słowa kluczowe

EN

lamellar cracks; experimental tests; numerical method; finite element method

PL

pęknięcia powierzchniowe; badania eksperymentalne; metody numeryczne; metoda elementów skończonych

• Wydawca: Wydawnictwo Politechniki Łódzkiej
• Czasopismo: Mechanics and Mechanical Engineering
• Rocznik: 2014
• Tom: Vol. 18, nr 1
• Strony: 25--31
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Jaroniek M.

• Department of Strength of Materials Lodz University of Technology Stefanowskiego 1/15, 90-924 Lódź, Poland

autor

Niezgodziński T.

• Department of Dynamics Lodz University of Technology Stefanowskiego 1/15, 90-924 Lódź, Poland

Bibliografia

• [1] Dyląg, Z., Jakubowicz, A. and Oroś, Z.: Strength of Materials, (in Polish), WNT, 1996.
• [2] Blum, A. and Niezgodziński, T.: Lamellar cracks, Publisher Institute for Sustainable Technologies - Monographs, (in Polish), 2007.
• [3] Neimitz, A.: Mechanics of fracture, PWN, (in Polish), 1998.
• [4] Stupnicki, J.: Trends of experimental mechanics, Journ. of Theoterical and Applied Mechanics, Vol. 2, No 34, 207-233, 1965.
• [5] User's Guide ANSYS, Ansys, Inc., Huston, USA.
• [6] Wożniak, C.: Microdynamics: Continuum. Modelling the Simple Composite Materials, J. Theor. Appl. Mech., 33, 267-289, 1995.
• [7] Zienkiewicz, O. C.: The Finite Element Method in Engineering Science, Mc Graw -Hill, 1971.