Equation Derivation and Verification for Hoop Stress and Load of C-ring

doi:10.11885/j.issn.1674-5086.2018.08.03.01

Abstract

Abstract: Based on the structural dimensions and mechanical relation of an arbitrary C-ring specimen, a mechanical model for an arbitrary cross section within a C-ring was established. According to the fundamental theories of mechanics of materials, a theoretical equation was derived to describe the relation between the hoop stress at any point on the outer and inner walls and the loading displacement and load of a C-ring specimen. To verify the equation derived in this study, a mechanical model of C-ring specimen based on finite element method was established. The C-ring specimen test required the largest hoop tensile stress to be 650 MPa. The results of the finite element method and theoretical equation were compared for a C-ring specimen with tubing outer diameter of 88.9 mm. The error of load and displacement obtained by using the finite element method and the theoretical equation were -1.82% and 1.25%, respectively. The results verify the theoretical equation, which provides a simple calculation method for determining the experimental loading parameters of sulfide stress corrosion cracking and stress corrosion cracking tests on C-ring.

Key words: C-ring specimen, theoretical equation derivation, loading stress calculation, finite element, stress corrosion cracking

CLC Number:

TE983

LIAN Zhanghua, LIANG Jiankun, WANG Yuhai, ZHANG Qiang, MOU Yisheng. Equation Derivation and Verification for Hoop Stress and Load of C-ring[J]. 西南石油大学学报(自然科学版), 2019, 41(5): 161-168.

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