Analysis on Elastoplastic Stress Distribution in a Layered Cylindrical Vessel With Interlayer Gaps

Author:

Xu Shugen1,Wang Weiqiang2

Affiliation:

1. College of Chemical Engineering, China University of Petroleum (Huadong), Qingdao 266555, China; Engineering and Technology Research Center for Special Equipment Safety of Shandong Province, Jinan 250061, China

2. School of Mechanical Engineering, Shandong University, Jinan 250061, China; Engineering and Technology Research Center for Special Equipment Safety of Shandong Province, Jinan 250061, China

Abstract

In this paper, the formulae for elastoplastic stress distribution in layered cylindrical vessel layers with gaps have been provided. These formulae are based on the modified Pimshtein formulae for the elastic stress of layers. Plane strain with ideal elastoplastic model of materials is adopted. A practice example is presented to show how the formulae can be used for elastoplastic stress calculation. The hoop, radial, axial, and Von Mises equivalent stresses are obtained. The calculation result showed that the stress state of layered cylindrical vessel is more complex than that of monobloc cylindrical shell due to the interlayer gaps. The stress distribution is discontinuous. Calculation results obtained theoretically were compared to those obtained by finite element method (FEM). It shows that the results from the proposed formulae are in good agreement with finite element results.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality

Reference8 articles.

1. The Strength Calculation of Layered High Pressure Vessel;Chen;J. China Univ. Pet.

2. Effect of Gap Between Layers of Wrapped Vessels on Circumferential Stress;Liu;J. Qingdao Univ. Sci. Technol.

3. Elastoplastic Operation of Multilayer Cylinders With Gaps;Pimshtein;Chem. Pet. Eng.

4. The Synthetical Study on Stress and Heat Conduction Performance of Multilayer High Pressure Vessels;Fu;ASME J. Pressure Vessel Technol.

5. Stress State Analysis of Multilayered Urea Reactors;Song;J. Mech. Strength

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