Buckling and Postbuckling Analysis of Stiffened Cylindrical Shells Subjected to Axial Compression and External Pressure

• Published in: INTELLIGENT MANUFACTURING AND MECHATRONICS, SIMM 2023
• Main Authors: Ismail, Mohd Shahrom; Mahmud, Jamaluddin
• Format: Proceedings Paper
• Language: English
• Published: SPRINGER-VERLAG SINGAPORE PTE LTD 2024
• Subjects: Engineering
• Online Access: https://www-webofscience-com.uitm.idm.oclc.org/wos/woscc/full-record/WOS:001313737300042
• ISSN: 2195-4356; 2195-4364
• DOI: 10.1007/978-981-97-0169-8_42

This work aims to analyse the influence of imperfections of stiffened cylindrical shells subjected to axial compression and external pressure using finite element (FE) analysis. Several case studies were conducted with five (5) available experimental data using the single perturbation load approach (SPLA) and codified formulation. Further comparison of the local dent produced by the SPLA is made with given experimental data and estimated codified guideline. Overall, the SPLA demonstrates an attractive ability for preliminary design of imperfection in axially compressed and externally pressured stiffened cylindrical shells together with its estimated local dent. The difference between the FE model and the experimental results was in the range of 10-14% for the case of axial compression and 5-13.6% for the case of external pressure. Eventually, the SPLA appeared not to be the worst structural imperfection in some cases. This is pointed out by the overestimation of collapse loads established by some models, namely AR-1a, Y1A and R2 in comparison with experimental results. The findings also highlight a small limitation in calculating the local dent through codified formulation. Nonetheless, the stiffened cylinder evolution in buckling failure is also discussed thoroughly.