Citation

Yin Y, Lan C, Li J, Mao D, Shi J. China Saf. Sci. J. 2019; 29(10): 18-23.

Copyright

(Copyright © 2019, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2019.10.004

PMID

unavailable

Abstract

In order to study failure process of buried PE gas pipeline in the process of geological settlement, the stress-strain corresponding relationship of PE pipe was obtained by mechanical tensile experiment firstly. An improved Sherwood equation was fitted and the failure prediction model of PE pipes on the basis of strain rate was obtained. Then the mechanical response of PE pipelines in different settlement stages and with different slopes was simulated by ABAQUS software. The results show that the fourth-order Sherwood constitutive model can express and predict the mechanical response of PE pipes, and that the displacement and the depth of soil settlement have a direct impact on the distribution of stress and strain and the ellipticity of pipes. © 2019 China Safety Science Journal. All rights reserved.

Language: zh