Three dimensional analysis of thermal shock effect on inner semi-elliptical surface cracks in a cylindrical pressure vessel

M. Perl, Y. Greenberg

Research output: Contribution to journalArticlepeer-review

Abstract

Transient mode I stress intensity factors (Krr) distributions along semi-ellipitical cracks fronts resulting from a thermal shock is investegated Krr distributions for various crack arrays of n=2+48 cracks bearing cracks of relative depth of a/W=0.1+0.4 and with ellipticities of a/c-0.5, 1.0 and 1.5 are evaluated for a cylindrical pressure vessel of radii ratio of Ro/Ri=2 Temperature distributions through the vessel's wall are evaluated for various time steps in the interval 2+10 msec. Both the thermal and the elastic analyses are performed via the finite element (FE) method using the standard ANSYS 5.1 code. The temperature fields evaluated in the first step serve as input to the second step, the elastic analysis, in which the Krr is evaluated.

Original languageEnglish
Pages (from-to)55-59
Number of pages5
JournalAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume344
StatePublished - 1 Dec 1997

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