Shell Surface with Fibonacci spiral curve fold

Effect of curve folds in the form of Fibonacci spiral on behaviour of folded shell structures has been investigated in this study. Two kinds of models with different configuration of the spiral curves have been generated. Results of analysis show that shell surface with spiral curved fold lines with variable radius has better performance as compared to that of constant radius. Specifically, in terms of maximum tensile stress, shell surface with constant radius is 24.95% higher than the model with variable radius and also maximum compressive stress for shell surface with constant radius is 36.83% higher than the model with variable radius. In terms of deflection, maximum vertical displacement in model with constant radius and variable radius is approximately the same with difference of only 4%.