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![Change in the apparent angle in the considered periodic load variation (Figure 3) throughout the radius of the blade. The graph is based on an equation from a previous study [4].](publication/370465563/figure/fig4/AS:11431281155097859@1683046874584/Change-in-the-apparent-angle-in-the-considered-periodic-load-variation-Figure-3.jpg)
Change in the apparent angle in the considered periodic load variation (Figure 3) throughout the radius of the blade. The graph is based on an equation from a previous study [4].
Source publication
This study investigates the feasibility of utilising common composite material layup techniques in ship propeller blade design to achieve an automatic pitch adjustment through bending-induced twist deformation. A comprehensive design approach, including various reinforcement materials and arrangements, was employed to attain the desired foil pitchi...
Citations
... While an extraordinary feat, such algorithms are only optimised within the considered parameters and for the considered desirable outcome. However, how one can arrange various materials to make a composite propeller is mainly limited by the materials, blade geometry, imagination and manufacturability [8]. The vast number of factors that need to be considered makes the adaptive propeller-blade design process complex. ...
... For such rigid propellers, the propeller's geometric shape is the main factor when designing propellers for hydrodynamic performance [1]. However, a more recent alternative approach to propeller designs has been to engineer adaptive polymer-based composite blades with a bend-twist coupling that shows favourable blade deformation, which can improve fluid dynamic performance [1,[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Bend-twist coupling has also been applied to composite products such as wind turbines and tidal turbines [4,6,16,21], and much of that experience can be applied to propeller blades. ...
... The finite element analysis (FEA) used in this paper is performed with the FEA software Abaqus 2017 by Systema Dassaults [36]. An Abaqus FEA methodology is applied based on FEA methods that have been explored and experimentally verified in previous publications [8,[27][28][29]37,38]. The paper that explored the experimental verification of the FEA method on a composite propeller was previously published in Polymers [38]. ...
Four plausible design concepts are applied together to investigate composite bend–twist propeller-blade designs that show high twisting per bending deflection. The design concepts are first explained on a simplified blade structure with limited unique geometric features to determine generalized principles for applying the considered design concepts. Then, the design concepts are applied to another propeller-blade geometry to obtain a bend–twist propeller-blade design that achieves a specific pitch change under an operational loading condition with a significant periodic-load variation. The final composite propeller design shows several times more bend–twist efficiency than other published bend–twist designs and shows a desirable pitch change during the periodic-load variation when loaded with a one-way fluid–structure-interaction-derived load case. The high pitch change suggests that the design would mitigate undesirable blade effects caused by load variations on the propeller during operation.
