Burst pressures for toriconical shells - experimental and numerical approach

[+] Author and Article Information
Jan Blachut

AGH - University of Science and Technoloy, 30-067 Kraków, Poland

Olawale Ifayefunmi

Universiti Teknikal Malaysia Melaka, Faculty of Engineering Technology, 76100 Malaysia

1Corresponding author.

ASME doi:10.1115/1.4037043 History: Received June 25, 2016; Revised June 04, 2017


The paper describes burst pressures of eight mild steel toriconical shells and proposes a criterion for their ultimate loss of structural integrity based on true stress-strain material relationship. All test models were initially loaded by quasi-static external pressure until they buckled/collapsed. They were subsequently internally pressurised until burst. The details about the numerical process which simulates the two-stage loading process, i.e., starting with buckling by external pressure being followed by reloading using internal pressure for up to the burst, are given. The paper concentrates on numerical procedure which allows computation of the burst pressure using extensive plastic straining. It is shown that burst pressures based on the excessive plastic straining are closer to reality (and experiments) than those based on plastic instability.

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