Perpustakaan Digital ITB

This research focuses on the weight reduction of the wing structure for a 19-passenger amphibious transport aircraft using the Finite Element Method (FEM). Through detailed FEM simulations under static loading conditions, the study successfully analysed the wing's structural behaviour, recording a maximum stress of 192.6 MPa and a displacement of 42.69 mm. The initial total mass of the wing structure was determined to be 481.6 kg. Analysis revealed that the skin and skin panels were the most significant contributors to the wing's mass, accounting for over 70%, followed by stringers/stiffeners (19% to 21%) and ribs (6.87% to 7.22%). The spar had minimal impact, contributing less than 0.4%. Optimization using the Taguchi method led to a successful reduction in wing weight to 385.4 kg, achieving a total weight reduction of 96.2 kg while maintaining structural integrity below the yield strength. The findings demonstrate that significant weight reduction is achievable through systematic optimization without compromising the structural performance of the wing.