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XX2.01 - Origami-Inspired Compliant Mechanisms: Test Beds and Applications for Shape Programmable Materials 
Date/Time:
April 22, 2014   10:30am - 11:00am
 
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Compliant mechanisms achieve their motion from the deflection of flexible components rather than from traditional motion elements such as hinges and bearings. Origami models can be thought of as compliant mechanisms during folding because they achieve their motion from bending at folds and flexing panels. Advantages of compliant mechanisms include characteristics associated with efficiency such as reduced part count and ease of manufacture, as well as compactness (also shared with origami), low weight, low wear, reduced maintenance, improved recyclability, and high precision motion. Uniting origami and compliant mechanisms principles could enable innovative and cost-effective devices that are capable of accomplishing sophisticated mechanical tasks. Origami-inspired compliant mechanisms have the potential advantages of planar fabrication (they can be fabricated from planar sheets of material and allow the use of planar fabrication methods); a flat initial state (which allows compactness for volume critical applications); and monolithic composition (which provides the advantages associated with compliant mechanisms noted above). Many recent origami-inspired compliant mechanisms have been manually or passively actuated, but some applications would be improved, and many others made feasible, if they were actuated by integrated actuators. Origami-inspired compliant mechanisms have characteristics that make them an ideal test bed for shape programmable materials, including the following: 1) Because of their nature, it may be possible to make entire compliant mechanisms, or at least many of their elements, of programmable materials; 2) They provide a cost effective way to evaluate, validate, and refine programmable materials; 3) Their basic designs (e.g. crease patterns) are transferrable, enabling sharing between labs across the world; 4) Their applications offer specifications and performance goals to guide material development; 5) Successful integration with applications can lead to mechanisms that can make a positive societal, scientific, or economic impact. Specific compliant mechanisms proposed as potential test beds include the following: 1) Bistable waterbomb base (a straightforward origami base that has interesting bistable behavior); 2) Lamina emergent mechanisms (compliant mechanisms that are fabricated in a plane but have motion that emerges out of the plane of fabrication); 3) Two-degree-of-freedom positioner (a monolithic compliant mechanism originally developed for space applications); 4) Deployable solar panel array (compact when stored and a large surface area when deployed); 5) Minimally invasive surgery devices (compact during transport, then deployed when at the surgery site).
 


 
 
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