Paper number 446
|OPTIMIZATION OF A COMPOSITE MATERIAL BOX-BEAM FOR USE IN A HAPTIC DEVICE|
Pierre Cyr and Dr. Larry B. Lessard
Department of Mechanical Engineering, McGill University
817 Sherbrooke Street West, Montreal, Quebec, H3A 2K6, Canada
|Summary||The objective of this work was to develop an optimization method based on a finite-element procedure to find the optimal ply angles for a laminate used in a box-beam of specified dimensions and material. This box-beam can then become the base for the implementation of a linkage of the Freedom-7 Haptic Hand Controller , a small robotic device. The optimization algorithm is based on the Nedler-Mead Simplex Method and was used to determine the lay-ups providing the highest fundamental frequencies for a specific box-beam. For the box-beam studied, the most detrimental vibration mode was wall squinting and the optimal lay-up involved high ply angles at the top and bottom of the laminate. Changing the dimensions of the box-beam had some impact on the optimal lay-up, but more importantly on the highest achievable fundamental frequency. A cross-section with a height-to-width ratio of 2 yielded the highest fundamental frequency.
||Keywords|| optimization, Finite Element method (FEM), vibration, fundamental mode, box-beam.
Theme : Mechanical and Physical Properties ; Damage Mechanics
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