Crack-Tip Stress Field of Cracked Pipe under Combined Tension and Thermal Load

J. H. Je, H. S. Lee, D. J. Kim, Y. J. Kim

研究成果: Conference article査読


In the presence of excessive plasticity, the fracture toughness depends on the size and geometry. For material under fully yielded conditions, the stresses near the crack tip are not unique, but depend on geometry. So Single-parameter; J-approach is limited to high-constraint crack geometry. J-Q theory has been proposed in order to decide crack geometry constraint. This approach assumes that the crack-tip fields have two degrees of freedom. In this paper, based on J-Q theory, crack-tip stress field of fully circumferential cracked pipe under combined load is investigated using FE analysis. Combined loads are tensile axial force and thermal gradient of radial direction. Q-stresses of a crack geometry and it's loading state are used to determine constraint effect, and give a characteristic order for crack-tip constraint.

ジャーナルProcedia Engineering
出版ステータスPublished - 2015
イベント14th International Conference on Pressure Vessel Technology, 2015 - Shanghai, China
継続期間: 2015 9月 232015 9月 26

ASJC Scopus subject areas

  • 工学(全般)


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