Compliant mechanisms with evenly distributed stresses have better load-bearing ability and larger range of motion than mechanisms with compliance and stresses lumped at flexural hinges. In this paper, we present a metric to quantify how uniformly the strain energy of deformation and thus the stresses are distributed throughout the mechanism topology. The resulting metric is used to optimize cross-sections of conceptual compliant topologies leading to designs with maximal stress distribution. This optimization framework is demonstrated for both single-port mechanisms and single-input single-output mechanisms. It is observed that the optimized designs have lower stresses than their nonoptimized counterparts, which implies an ability for single-port mechanisms to store larger strain energy, and single-input single-output mechanisms to perform larger output work before failure.
A Metric to Evaluate and Synthesize Distributed Compliant Mechanisms
Contributed by the Design Automation Committee of ASME for publication in the Journal of Mechanical Design. Manuscript received November 29, 2011; final manuscript received September 23, 2012; published online November 21, 2012. Assoc. Editor: Shinji Nishiwaki.
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Krishnan, G., Kim, C., and Kota, S. (November 21, 2012). "A Metric to Evaluate and Synthesize Distributed Compliant Mechanisms." ASME. J. Mech. Des. January 2013; 135(1): 011004. https://doi.org/10.1115/1.4007926
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