Restoration of Ultimate Strength of Dented Hemispheres Under External Hydrostatic Pressure  

作　　者：HUANG Chen ZHANG Jian WANG Fang DI Chen-yang 

机构地区：[1]School of Mechanical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China [2]Shanghai Engineering Research Center of Hadal Science and Technology,Shanghai Ocean University,Shanghai 201306,China

出　　处：《China Ocean Engineering》2022年第3期500-507,共8页中国海洋工程（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant Nos.52071160 and 52071203);the National Natural Science Foundation of Jiangsu Province(Grant Nos.BK20190103 and BK20190964);the Six Talent Peaks Project of Jiangsu Province(Grant No.KTHY-068).

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 hemi-sphere 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.

关 键 词：HEMISPHERE RESTORATION ultimate strength hydrostatic pressure BUCKLING 

分 类 号：P75[天文地球—海洋科学] U661.4[交通运输工程—船舶及航道工程]