INNER SURFACE CRACKS IN AN INTERNALLY PRESSURIZED CYLINDER ANALYZED BY A THREE DIMENSIONAL DISPLACEMENT-HYBRID FINITE ELEMENT METHOD.

S. N. Atluri, K. Kathiresan, A. S. Kobayashi, M. Nakagaki

Research output: Contribution to conferencePaper

8 Scopus citations

Abstract

Stress intensity factors of unpressurized and pressurized surface cracks at the internal surface of an internally pressurized cylinder are determined directly by a three-dimensional displacement-hybrid finite element method. The finite element method is based on a modified variational principle of the potential energy, with arbitrary element interior displacements, interelement boundary displacements and element boundary tractions as variables. The special crack front element used in this analysis contains the inverse square root singularity in stresses where the three stress intensity factors, K//I, K//I//I, and K//I//I//I are quadratically variable along with the unknown displacements. Stress intensity factors for semi-elliptical cracks with crack aspect ratios of b/a equals 0. 5 and 1. 0, and at crack depths of 50 percent and 80 percent of the cylindrical wall thickness, are shown for internally pressurized cylinders with outer to inner diameter ratio, R//o/R//i equals 2.

Original languageEnglish
Pages527-533
Number of pages7
StatePublished - 1977
EventUnknown conference - Tokyo, Jpn
Duration: Apr 19 1977Apr 22 1977

Conference

ConferenceUnknown conference
CityTokyo, Jpn
Period04/19/7704/22/77

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    Atluri, S. N., Kathiresan, K., Kobayashi, A. S., & Nakagaki, M. (1977). INNER SURFACE CRACKS IN AN INTERNALLY PRESSURIZED CYLINDER ANALYZED BY A THREE DIMENSIONAL DISPLACEMENT-HYBRID FINITE ELEMENT METHOD.. 527-533. Paper presented at Unknown conference, Tokyo, Jpn, .