SA EVOLUTION
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SA-Evolution is a scientific approach to fibre layout. SA-Evolution relies on robust AEROELASTIC ANALYSIS to help sail designers achieve maximum results from fibre membrane sails. The Method SA Evolution combines all phases seamlessly: from design and fibre layout to aerodynamic, structural and aeroelastic analysis. Wind loads are applied onto the sail/rig configuration, deforming the sail and mast as an integrated structure. As the structure is deformed the sail shape changes so SA Evolution can calculate new aerodynamic data from the deformed surface. This changes the sail shape yet again and the procedure is reiterated until convergence is achieved between stress and rig/sail deformation. STEP 1: Based on your design, the aerodynamic forces acting on the sail are computed, taking into account the presence and influence of the deck, the interaction of the main sail and headsail, as well as the influence of the sail’s wake. STEP 2: Then, 3D non-linear structural analysis is undertaken, computing the sail’s deformed flying sail shape and the stress distribution, taking into account the initial fibre layout, content and modulus. STEP 3: Possible variations in sail performance due to changes in the flying sail shape are estimated using 3D aero-elastic analysis. STEP 4: An evaluation of the results enables the final optimization of the fibre layout, fibre content and modulus needed to ensure top performance for your design shape.

A scientific revolution is taking place in sail design The Optimization Process: 4 Phases Aerodynamic loads Flying sail shape Principal Stress directions Calculation of stress direcCalculation of the wind loads in any desired sailing tions & deformed sail-shape under the wind loads, by conditions taking into account the type and density of fibres Following the indication of the stress directions and intensity on the flying sail-shape, the optimal fibre layout is designed. “The optimization analysis for the TP52 mainsail and jib conducted for Dimension Polyant was specifically related to the...