Design of a Folded Leaf Spring with high support stiffness at large displacements using the Inverse Finite Element Method

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Design of a Folded Leaf Spring with high support stiffness at large displacements using the Inverse Finite Element Method

Conference Paper (2019)

Author(s)

J. Rommers (TU Delft - Mechanical Engineering)

J. L. Herder (TU Delft - Mechanical Engineering)

Research Group

Mechatronic Systems Design

Compliant mechanisms Flexures Precision Support stiffness Inverse Finite Elements

DOI related publication

https://doi.org/10.1007/978-3-030-20131-9_209 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:4e086441-5d7a-431c-aa0d-ab9b36f8281e

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Publication Year

2019

Language

English

Research Group

Mechatronic Systems Design

Pages (from-to)

2109-2118

Publisher

Springer

ISBN (print)

978-3-030-20130-2

ISBN (electronic)

978-3-030-20131-9

Event

15th IFToMM World Congress on Mechanism and Machine Science<br/> (2019-06-30 - 2019-07-04), Krakow, Poland

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175

Abstract

Compliant (flexure) elements provide highly precise motion guiding because they do not suffer from friction or backlash. However, their support stiffness drops dramatically when they are actuated from their home position. In this paper, we show that the existing Inverse Finite Element (IFE) method can be used to efficiently design flexure elements such that they have a high support stiffness in their actuated state. A folded leaf spring element was redesigned using an IFE code written in Matlab™. The design was validated using the commercial Finite Element software package Ansys™, showing the desired high support stiffness in the actuated state. The proposed method could aid in the design of more compact flexure mechanisms with a larger useful range of motion.