Restoration of Ultimate Strength of Dented Hemispheres Under External Hydrostatic Pressure

被引：3
|
作者：
Huang Chen [1 ]
Zhang Jian [1 ]
Wang Fang [2 ]
Di Chen-yang [1 ]
机构：
[1] Jiangsu Univ Sci & Technol, Sch Mech Engn, Zhenjiang 212003, Jiangsu, Peoples R China
[2] Shanghai Ocean Univ, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai 201306, Peoples R China
来源：
CHINA OCEAN ENGINEERING | 2022年 / 36卷 / 03期
基金：
中国国家自然科学基金;
关键词：
hemisphere; restoration; ultimate strength; hydrostatic pressure; buckling; RING-STIFFENED CYLINDERS; AXIAL-COMPRESSION; RESIDUAL STRENGTH; SHELLS; DOMES;
D O I：
10.1007/s13344-022-0043-6
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This study aimed to restore the ultimate strength of dented stainless-steel hemispheres with a radius of 90 mm and a thickness of 0.86 mm. All of the hemispheres were subjected to external hydrostatic pressure. Small stainless-steel stiffened caps were used to eliminate the effect of indention on the ultimate strength. These caps had a radius of 36 mm, a thickness of 0.76 mm, and a height of 10.44 mm. Six hemispherical samples, including two intact hemispheres, two dented hemispheres without stiffening, and two dented hemispheres with stiffening, were prepared. Each hemisphere was geometrically measured for shape and thickness, hydrostatically tested for destruction, and numerically evaluated for comparison. The experimental and numerical data agreed well with each other. As a result, a spherical cap can effectively restore the ultimate strength of dented hemispheres under external hydrostatic pressure. The proposed restoration approach can be used to strengthen underwater pressure hulls with large local geometric imperfections.
引用
收藏
页码：500 / 507
页数：8
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