Abstract
In a previous study, a new empirical formula for the ultimate strength of the titanium alloy spherical pressure hulls of deep manned submersibles is recommended. This formula is mainly derived from the systematic finite element analyses of ANSYS. This paper introduces the further experimental verification of this new equation. Four small spheres of inner diameters 500 mm are tested to collapse. The collapse load range is predicted before the test and all the four final test results are within the range. The work shows that the predictions by the new equation are in well agreement with the experimental results. This suggests that the new equation can be used as the core equation to update current design rules.
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