By Nicolae Lobontiu
Flexure hinges carry a number of benefits over classical rotation joints, together with no friction losses, little need for lubrication, no hysteresis, compactness, skill to be used in small-scale purposes, ease of fabrication, nearly no meeting, and no required upkeep. Compliant Mechanisms: layout of Flexure Hinges presents sensible solutions to the current and destiny wishes of effective layout, research, and optimization of units that include flexure hinges. With a hugely unique technique the text:Discusses new and classical forms of flexure hinges (single-, - and multiple-axis) for 2- and 3-dimensional applicationsAddresses quite a lot of business functions, together with micro- and nano-scale mechanismsQuantifies flexibility, precision of rotation, sensitivity to parasitic loading, power intake, and rigidity boundaries via closed-form compliance equationsOffers a unitary presentation of person flexure hinges as fully-compliant individuals through closed-form compliance (spring premiums) equationsFully defines the lumped-parameter compliance, inertia and damping houses of flexure hinges Develops a finite point method of compliant mechanisms by way of giving the fundamental formula of recent flexure hinge line elementsIncorporates extra complicated issues devoted to flexure hinges together with huge deformations, buckling, torsion, composite flexures, form optimization and thermal effectsCompliant Mechanisms: layout of Flexure Hinges offers sensible solutions and instructions to the wishes of successfully designing, studying, and optimizing units that come with flexure hinges. It includes ready-to-use plots and easy equations describing numerous flexure forms for the pro that wishes fast suggestions to present purposes. The publication additionally presents self-contained, easy-to-apply mathematical instruments that offer adequate suggestions for real-time challenge fixing of extra functions.
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Additional info for Compliant Mechanisms: Design of Flexure Hinges
4. Similar to a single-axis configuration, this flexure hinge will preferentially bend about an axis of minimum bending compliance, called the primary sensitive axis, that lies in the cross-section of minimum thickness t. Also positioned in the same cross-section, and most often perpendicular on the primary sensitive axis, is a secondary sensitive axis. Compared to the primary sensitive axis, the compliance of the secondary axis is slightly smaller, in order to capture and be able to react to higher bending loading that might act about this direction.
The matter of having an extended domain with several options for flexure configurations is not the result of a mere mathematical exercise and is not at all unnecessary, as it might first appear. The compliant behavior of flexure hinges and, therefore, the overall response of a flexure-based compliant mechanism largely depend on the specific geometry of the flexure for a given material. Slight alterations or variations in geometry can produce results that are sensible at the response level. This aspect is particularly important in mechanisms where precision is a key performance parameter or where a finely tuned output is expected in terms of displacement, force, or frequency (resonant) response.
6. T. , Elliptical flexure hinges, Revue of Scientific Instruments, 68(3), 1474, 1997. 7. Lobontiu, N. , Design of symmetric conic-section flexure hinges based on closed-form compliance equations, Mechanism and Machine Theory, 37(5), 477, 2002. 8. Lobontiu, N. , Parabolic and hyperbolic flexure hinges: flexibility, motion precision and stress characterization based on compliance closed-form equations, Precision Engineering: Journal of the International Societies for Precision Engineering and Nanotechnology, 26(2), 185, 2002.
Compliant Mechanisms: Design of Flexure Hinges by Nicolae Lobontiu