Study on residual stress of equatorial weld of Ti80 spherical pressure shell

被引：0

作者：

Li L.-B. ^{[1
]}

Zhang S.-Y. ^{[1
]}

Sun K.-X. ^{[1
]}

Wan Z.-Q. ^{[2
]}

Li Y.-Q. ^{[2
]}

Sha Y.-C. ^{[1
]}

Bao H.-N. ^{[1
]}

机构：

[1] School of Ship and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang

[2] China Ship Scientific Research Center, Wuxi

来源：

Chuan Bo Li Xue/Journal of Ship Mechanics | 2021年 / 25卷 / 07期

关键词：

Equatorial weld; Residual stress; Spherical pressure shell; Ti80;

D O I：

10.3969/j.issn.1007-7294.2021.07.012

中图分类号：

学科分类号：

摘要：

Titanium alloy has been widely used because of its excellent properties. The welding characteristics of titanium alloy and the safety and reliability of its structure in service have attracted more and more attention. At present, titanium alloy has become the preferred material for spherical pressure shells of manned deep submersibles. In this paper, the residual stress of a Ti80 butt welded thick plate was measured with method of non-destructive X-ray and obtained by numerical simulation analysis. The results of experiment and simulation were in good agreement. The transverse residual tensile stress of the Ti80 butt welded thick plate exhibited an asymmetric bimodal distribution, and the longitudinal residual tensile stress along the weld center line was higher. The internal transverse residual stress and the internal vertical residual stress along thickness direction of the weld seam were tensile stress near the upper and lower surfaces, and the transverse residual stress was higher than the vertical residual stress. The residual stress along the thickness direction showed a trend of the tensile stress near the surface and the compressive stress in the middle. Then, the residual stress of equatorial weld of the Ti80 spherical pressure shell was numerically simulated with the method of thermal elastic-plastic analysis, and the distribution rules of the residual stress of the surface and the internal residual stress of the equatorial weld of the Ti80 spherical pressure shell were obtained. The results show that (1) the residual stress of the inner surface of the Ti80 spherical pressure shell is higher tensile stress; (2) the longitudinal residual tensile stress is greater than the transverse residual tensile stress; (3) the transverse residual stress of the outer surface of the spherical shell was higher compressive stress; and (4) the longitudinal residual stress was tensile stress. © 2021, Editorial Board of Journal of Ship Mechanics. All right reserved.

引用

页码：946 / 955

页数：9

共 6 条

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