Download Compliant Mechanisms: Design of Flexure Hinges by Nicolae Lobontiu PDF

By Nicolae Lobontiu

Flexure hinges carry a number of merits over classical rotation joints, together with no friction losses, no use for lubrication, no hysteresis, compactness, skill to be used in small-scale purposes, ease of fabrication, almost no meeting, and no required upkeep. Compliant Mechanisms: layout of Flexure Hinges presents functional 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 sorts of flexure hinges (single-, - and multiple-axis) for 2- and 3-dimensional applicationsAddresses quite a lot of business purposes, together with micro- and nano-scale mechanismsQuantifies flexibility, precision of rotation, sensitivity to parasitic loading, power intake, and pressure barriers via closed-form compliance equationsOffers a unitary presentation of person flexure hinges as fully-compliant participants by way of closed-form compliance (spring premiums) equationsFully defines the lumped-parameter compliance, inertia and damping homes of flexure hinges Develops a finite aspect method of compliant mechanisms via giving the fundamental formula of recent flexure hinge line elementsIncorporates extra complicated subject matters devoted to flexure hinges together with huge deformations, buckling, torsion, composite flexures, form optimization and thermal effectsCompliant Mechanisms: layout of Flexure Hinges presents useful solutions and instructions to the wishes of successfully designing, interpreting, and optimizing units that come with flexure hinges. It comprises ready-to-use plots and straightforward equations describing a number of flexure varieties for the pro that wishes fast suggestions to present purposes. The booklet additionally offers self-contained, easy-to-apply mathematical instruments that supply enough tips for real-time challenge fixing of extra functions.

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The principle permits rigorous treatment of the compliance and stiffness notions and is particularly useful in situations where load-deformation aspects of elastic bodies are of interest. Castigliano’s 1367_Frame_C02 Page 25 Friday, October 18, 2002 1:49 PM Compliance-Based Design of Flexure Hinges 25 displacement theorem will be reviewed next. This theorem represents the key tool for deriving all closed-form compliance equations that will follow. An example will accompany the theoretic presentation to better reinforce the main points of the theorem.

Parametric deflection approximations for end-loaded, large-deflection beams in compliant mechanisms, ASME Journal of Mechanical Design, 117(1), 156, 1995. 13. L. , Determination of the degrees of freedom of compliant mechanisms using the pseudo-rigid-body model concept, in Proc. of the Ninth World Congress on the Theory of Machines and Mechanisms, Milano, Italy, 2, 1995, p. 1537. 14. , The design and analysis of compliant MEMS using the pseudo-rigid-body model, Microelectromechanical Systems (MEMS) 1997, DSC-Vol.

8 Discretization process for flexure hinges. 9 Three-dimensional flexure hinge with six degrees of freedom when the motion of one end is related to the opposite end. All compliances for every flexure hinge discussed in this book, as well as the subsequent quasi-static analysis of flexure-based compliant mechanisms, are developed by utilizing Castigliano’s displacement theorem, which is formulated based on the strain energy stored through elastic deformations. 8. By this modeling process, a flexure hinge is transformed into a complex mass-dashpot system defined individually and independently about its defining degrees of freedom (DOFs).

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