Abstract This paper is dedicated to the comprehensive investigation on dented hemispheres under external hydrostatic pressure. A total of 20 stainless steel hemispheres are fabricated, which have a nominal radius of 60 mm and a nominal wall thickness of 0.76 mm. These fabricated hemispheres are divided into four groups with five samples in each group. Wherein, three groups are dented using conical, spherical, and cylindrical indenters respectively, while the remaining group is designated as undented one. Both dented and undented hemispheres are hydrostatically tested into collapse to examine the effects of indention on the collapse characteristics of hemispheres. Additionally, all tested hemispheres are semi-analytically and numerically evaluated based on the measured geometric data and tested material properties. The experimental, semi-analytical, and numerical results are compared in figures and tables.

中文翻译：

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外静水压力下凹陷半球的研究

摘要 本文致力于对外部静水压力下凹陷半球的综合研究。总共制造了 20 个不锈钢半球，其标称半径为 60 mm，标称壁厚为 0.76 mm。这些制造的半球分为四组，每组有五个样品。其中，三组分别用锥形、球形和圆柱形压头压痕，其余一组为无压痕。凹痕和无凹痕的半球都进行了静压测试，以检查压痕对半球塌陷特性的影响。此外，所有测试的半球都基于测量的几何数据和测试的材料特性进行半分析和数值评估。实验性、半分析性、