Institute of Fundamental Technological Research
Polish Academy of Sciences

Former Staff

Prof. Zbigniew Olesiak, PhD, DSc

Doctoral thesis

1955

Stan naprężenia i odkształcenia sprężystego zginanej cienkościennej rury o przekroju soczewkowym

supervisor -- Prof. Witold Nowacki, PhD, IPPT PAN

supervisor -- Prof. Krzysztof Stencel, PhD, DSc, UW

Professor

1963	Title of professor

Recent publications

Frydrychowicz W.^♦, Matysiak S.^♦, Olesiak Z., Mieszane zagadnienia brzegowe termosprężystości ośrodka mikropolarnego, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.76, pp.1-43, 1977

Olesiak Z., Sneddon I.N.^♦, The distribution of surface stress necessary to produce a penny-shaped crack of prescribed shape, International Journal of Engineering Science, ISSN: 0020-7225, DOI: 10.1016/0020-7225(69)90066-4, Vol.7, No.8, pp.863-873, 1969

Abstract:
The problem considered is that of determining the distribution of surface stress p(ρ) = −σzz(ρ, 0) necessary to maintain the penny-shaped crack in the shape uz(ρ, 0) = w(ρ), 0 Affiliations:

Olesiak Z.	-	IPPT PAN
Sneddon I.N.	-	other affiliation

Olesiak Z., Plastic zone due to thermal stress in an infinite solid containing a penny-shaped crack, International Journal of Engineering Science, ISSN: 0020-7225, DOI: 10.1016/0020-7225(68)90023-2, Vol.6, No.2, pp.113-125, 1968

Abstract:
Dugdale's model is here employed to find the width of the plastic zone surrounding a crack which is being opened by the application of a flux of heat or temperature acting on crack surfaces. It is shown that the ratio of the crack diameter to the diameter of the plastic zone varies depending on the initial diameter of the crack, material constants, and the ratio of the flux of heat to the yield limit of the material. The pertinent formulae for the components of the displacement vector have been derived for a constant flux and for a flux which is a function of radius represented in the form of a Pourier-Bessel series. The ease of the prescribed temperature is reduced to the case of the given flux of heat.

Affiliations:

Olesiak Z.

IPPT PAN

Nowacki W., Olesiak Z., Stateczność powłoki walcowej wzmocnionej żebrami, Rozprawy Inżynierskie, ISSN: 0867-888X, Vol.4, No.1, pp.4-22, 1956

Nowacki W., Olesiak Z., Płyta kołowa na obwodzie częściowo utwierdzona zupełnie i częściowo swobodnie podparta, ARCHIWUM MECHANIKI STOSOWANEJ, ISSN: 0373-2029, Vol.8, No.2, pp.233-255, 1956