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Thin-walled rectangular and square-section tubes are vastly used in automotive, aerospace, marine and construction industries for their high strength-to-weight ratio, corrosion resistance, durability and aesthetic. This generates a growing demand for stainless steel tubes. The present work investigates the axial compression behaviour and transverse bending collapse response of stainless steel thin-walled square-section tubes made of Cr-Ni and Cr-Mn stainless steel in detail. The tubes were fabricated through a cold roll-forming process with an emphasis on the process parameters and forming mechanisms. Furthermore, the microstructural features and the mechanical properties of the as-received materials and the stainless steel square tubes are examined. This research work also provides an analytical model for bending collapse response and validates against the experimental findings. The research aims to enhance the understanding of the complex mechanical responses of these structural elements to various loading scenarios, thereby promoting the development of robust design methodologies.
Das et al. (Tue,) studied this question.