Elastic element showing low stiffness loss at large deflection

Dannis Michel Brouwer; Jacob Philippus Meijaard; Jan B. Jonker

Elastic element showing low stiffness loss at large deflection

Dannis Michel Brouwer, Jacob Philippus Meijaard, Jan B. Jonker

Faculty of Engineering Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

7 Citations (Scopus)

366 Downloads (Pure)

Abstract

Compliant mechanisms like a parallel guidance and a cross pivot flexure contain leaf-springs. The basic elastic elements like leaf-springs and wire flexures constrain Degrees-Of-Freedom (DOFs) when flat or straight respectively. However, when deflected these elastic elements lose stiffness rapidly. Therefore, mechanisms containing leaf-springs and wire flexures are suitable for small deflections only. This paper presents an elastic element, a so-called ‘curved hinge flexure’, which shows only a limited stiffness decrease at large rotational deflections of the initially 3 stiff directions. When comparing a curved hinge flexure with a single leaf-spring with comparable rotational compliance over a ± 15 degrees stroke, the stiffness in the stiff directions is 2.5 to 14 times higher.

Original language	Undefined
Title of host publication	Proceedings of the 24th ASPE Annual Meeting [cd-rom]
Place of Publication	Monterey, California, USA
Publisher	American Society for Precision Engineering
Pages	1-4
Number of pages	4
ISBN (Print)	9781887706513
Publication status	Published - 4 Oct 2009
Event	24th ASPE Annual Meeting 2009 - Monterey, United States Duration: 4 Oct 2009 → 9 Oct 2009 Conference number: 24 http://aspe.net/publications/Annual_2009/Annual_09.html

Publication series

Name
Publisher	ASPE

Conference

Conference	24th ASPE Annual Meeting 2009
Country	United States
City	Monterey
Period	4/10/09 → 9/10/09
Internet address	http://aspe.net/publications/Annual_2009/Annual_09.html

Keywords

IR-89567
METIS-257959

Access to Document

2859
open

Cite this

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title = "Elastic element showing low stiffness loss at large deflection",

abstract = "Compliant mechanisms like a parallel guidance and a cross pivot flexure contain leaf-springs. The basic elastic elements like leaf-springs and wire flexures constrain Degrees-Of-Freedom (DOFs) when flat or straight respectively. However, when deflected these elastic elements lose stiffness rapidly. Therefore, mechanisms containing leaf-springs and wire flexures are suitable for small deflections only. This paper presents an elastic element, a so-called ‘curved hinge flexure’, which shows only a limited stiffness decrease at large rotational deflections of the initially 3 stiff directions. When comparing a curved hinge flexure with a single leaf-spring with comparable rotational compliance over a ± 15 degrees stroke, the stiffness in the stiff directions is 2.5 to 14 times higher.",

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Elastic element showing low stiffness loss at large deflection. / Brouwer, Dannis Michel ; Meijaard, Jacob Philippus; Jonker, Jan B.

Proceedings of the 24th ASPE Annual Meeting [cd-rom]. Monterey, California, USA : American Society for Precision Engineering, 2009. p. 1-4.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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AU - Meijaard, Jacob Philippus

AU - Jonker, Jan B.

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Y1 - 2009/10/4

N2 - Compliant mechanisms like a parallel guidance and a cross pivot flexure contain leaf-springs. The basic elastic elements like leaf-springs and wire flexures constrain Degrees-Of-Freedom (DOFs) when flat or straight respectively. However, when deflected these elastic elements lose stiffness rapidly. Therefore, mechanisms containing leaf-springs and wire flexures are suitable for small deflections only. This paper presents an elastic element, a so-called ‘curved hinge flexure’, which shows only a limited stiffness decrease at large rotational deflections of the initially 3 stiff directions. When comparing a curved hinge flexure with a single leaf-spring with comparable rotational compliance over a ± 15 degrees stroke, the stiffness in the stiff directions is 2.5 to 14 times higher.

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