Effect of matching buckling loads on post-buckling behavior in compliant mechanisms

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Effect of matching buckling loads on post-buckling behavior in compliant mechanisms

Conference Paper (2021)

Author(s)

A. Numić (Student TU Delft)

T. W.A. Blad (TU Delft - Mechanical Engineering)

F. van Keulen (TU Delft - Mechanical Engineering)

Research Group

Computational Design and Mechanics

DOI related publication

https://doi.org/10.1115/DETC2021-68439 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:180501f5-2e1d-4562-9b7d-c20ec52eb8c9

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Publication Year

2021

Language

English

Research Group

Computational Design and Mechanics

Article number

V08AT08A010

ISBN (electronic)

978-0-7918-8544-4

Event

45th Mechanisms and Robotics Conference, MR 2021, Held as Part of the ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC-CIE 2021 (2021-08-17 - 2021-08-19), Virtual, Online

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Abstract

In this paper, a novel method for stiffness compensation in compliant mechanisms is investigated. This method involves tuning the ratio between the first two critical buckling loads. To this end, the relative length and width of flexures in two architectures, a stepped beam and parallel guidance, are adjusted. Using finite element analysis, it is shown that by maximizing this ratio, the actuation force for transversal deflection in post-buckling is reduced. These results were validated experimentally by identifying the optimal designs in a given space and capturing the force-deflection characteristics of these mechanisms.