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Topology optimized infill compliant mechanisms for improved output displacements
Compliant mechanisms are useful in microelectromechanical (MEM) and robotic systems. While several methodologies have been devised to optimize their performances, this study presents a new approach that improves their output displacements by introducing infill-like features through a local volume-constrained topology optimization framework. This framework introduces a p-norm aggregated local volume constraint within topology optimization for output displacement maximization considering linear material properties with small displacements. Three numerical examples are examined, first, to show the effectiveness of the proposed methodology, and then to assess the effects of local volume parameters and load uncertainties on the output displacements. Results show that higher input and output spring stiffnesses at different porosity levels decrease the corresponding output displacements. Although the introduction of infill features by the local volume-constrained topology optimization approach has been previously applied in the design of stiff structures, when used in a compliant mechanism, the output displacement can be improved by over 10%.
Topology optimized infill compliant mechanisms for improved output displacements
Compliant mechanisms are useful in microelectromechanical (MEM) and robotic systems. While several methodologies have been devised to optimize their performances, this study presents a new approach that improves their output displacements by introducing infill-like features through a local volume-constrained topology optimization framework. This framework introduces a p-norm aggregated local volume constraint within topology optimization for output displacement maximization considering linear material properties with small displacements. Three numerical examples are examined, first, to show the effectiveness of the proposed methodology, and then to assess the effects of local volume parameters and load uncertainties on the output displacements. Results show that higher input and output spring stiffnesses at different porosity levels decrease the corresponding output displacements. Although the introduction of infill features by the local volume-constrained topology optimization approach has been previously applied in the design of stiff structures, when used in a compliant mechanism, the output displacement can be improved by over 10%.
Topology optimized infill compliant mechanisms for improved output displacements
Optim Eng
Ibhadode, Osezua (author) / Nsiempba, Ken (author) / Zhang, Zhidong (author) / Toyserkani, Ehsan (author)
Optimization and Engineering ; 25 ; 413-437
2024-03-01
25 pages
Article (Journal)
Electronic Resource
English
Topology optimized infill compliant mechanisms for improved output displacements
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