What is the principle behind σ0=2[σ]t in clause 4.3.3.3 of GB/T150.3?

GB/T 150.3 is a Chinese standard that primarily deals with the design of pressure vessels. In the design of pressure vessels, it is very important to consider their stability, strength, and safety under various operating conditions. In clause 4.3.3.3 of GB/T 150.3, σ0=2t appears to refer to a formula used under specific conditions to calculate the stability of a vessel under external pressure. σ0 represents the design stress, and t represents the wall thickness. However, without the detailed information from the GB/T 150.3 standard document, it is difficult to provide a specific explanation. Generally, the allowable stress (σ) is determined based on the mechanical properties of the material (such as yield strength, tensile strength, etc.) and a safety factor. σ0=2t may be a simplified or empirical formula used to quickly estimate the allowable stress under given conditions. However, to understand the specific meaning and applicable conditions of a formula, it is necessary to consult the relevant standard documents to learn about its derivation, scope of application, and the underlying physical or engineering principles. If you encounter such calculations in design or engineering practice, it is recommended to consult a qualified engineer or refer directly to the GB/T 150.3 standard for accurate explanations and guidance. .

Analysis of external pressure stress on thick-walled cylinders

Yes, the formula for calculating the allowable pressure is based on external stress analysis; but why is σ0 taken as 2 times t, rather than 1 time or 1.5 times? Which standard or book provides an explanation for this?

This post was last edited by fzujunru on 2023-12-11 20:48: Ding Bomin, Analysis of ASME VIII Pressure Vessel Code, P96

Thank you. Do you have an electronic version of this book? Could you provide a download link?