SPRINGBACK EXPERIMENTAL EVALUATION AND VALIDATION OF AIRCRAFT INDUSTRY SHEET METAL

Abstract

The tendency of the metal to regain its original shape will result in the spring back when it is being formed to make aircraft components like outer body panels and brackets. When spring back occurs, the components will not meet the requirements of the design and there will be a need for shims to fit the component into place. This will lead to increase in weight, fabrication cost and also the assembly line time. So the Finite-Element Analysis (FEA) is used to accurately predict this deflection so that manufacturing processes can be optimized to produce a perfect output with least deviations from the design. This thesis bridges a relation between the experimentally evaluated spring back and FEA calculated spring back. Also in order to validate the FEA Analysis regression analysis has been performed. Variations have been tabulated and graphed as it bridges the gap between experimentally evaluated spring back and analysis of the design