Determination of Buckling limit diagram for metal sheets

Abstract

Sheet buckling a form of instability, is undesirable in final products as it contributes a decrease in part stiffness and affects part appearance and assembly. Controllable local buckling is sometimes introduced in forming processes to bring additional material to a forming cavity for subsequent stretching, which results in a more complex or deeper part. In this paper, the buckling limit diagrams (BLDs) were experimentally evaluated for mild steel and stainless steel SS316 sheets with thickness (1mm). The highest resistance of buckling in the buckling limit diagram is found in the stainless steel SS316 sheet and the lowest resistance in the mild steel sheet , also we can find the maximum buckling height in specimen 3 (50mm) of mild steel sheet , and the lowest buckling height shown in specimen 1 (18mm) for stainless steel SS316 sheet. The maximum elongation shown in specimen 1 (40) of mild steel sheet, and also the maximum load applied found in stainless steel SS316 sheet((60KN).