Compliant Mechanisms

Howell, Larry L.

doi:10.1007/978-94-017-9780-1_302

Cited by 231 publications

(386 citation statements)

References 3 publications

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“…where E is the Young's modulus of the material used [14], [15]. The Young's modulus is fixed by the material choice, while the geometry was previously chosen to create the bending stiffness required for passive rotation using the shortest length required to achieve the desired motion [19].…”

Section: Hinge Design and Proposed Improvementsmentioning

confidence: 99%

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Principles of microscale flexure hinge design for enhanced endurance

Malka

Desbiens

Chen

et al. 2014

2014 IEEE/RSJ International Conference on Intelligent Robots and Systems

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Articulation based on flexure hinges is increasingly popular in microrobotics because of the absence of Coulomb friction, ease of manufacturability, fluid motion, durability, and large angular ranges. However, the inherent flexibility of these hinges makes modeling very complex and specific to the particular engineering applications for which they were developed. In this paper we describe the development and testing of a simplified, versatile method for modeling the stress on a flexure hinge under multi-axis loads in order to maximize hinge lifespan. We also discuss other stress concentration reducing features and design rules that can be applied to more general flexure hinge designs to further extend hinge lifespan.The authors are with the Harvard

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Section: Hinge Design and Proposed Improvementsmentioning

confidence: 99%

“…Most publications on the subject predict the stiffness of all axes but only the stress experienced under simple loading conditions [14], [15]. Approximations of 3D hinge bending have also been developed [16].…”

Section: Introductionmentioning

confidence: 99%

Principles of microscale flexure hinge design for enhanced endurance

Malka

Desbiens

Chen

et al. 2014

2014 IEEE/RSJ International Conference on Intelligent Robots and Systems

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“…where E is the Young's modulus of the hinge material, I is the hinge's cross-sectional moment, and l is the length of the hinge [26]. Note that due to the short hinge aspect ratios, nonlinear ranges of deflection, and complicated loading conditions all found in this paper, the use of this model should be considered a rough approximation for design and initial investigation purposes only.…”

Section: Mechanism Conceptsmentioning

confidence: 99%

Magnetic actuation of ultra-compliant micro robotic mechanisms

Vogtmann

Bergbreiter

2014

2014 IEEE/RSJ International Conference on Intelligent Robots and Systems

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This work presents highly flexible elastomer and silicon micro robotic mechanisms actuated using embedded permanent magnets manipulated by an external magnetic field. The mechanisms are fabricated using a process to incorporate elastomer hinges and other features into silicon MEMS, and a method for embedding small magnets via press-fit into an elastomer sleeve. Fabricated mechanisms have demonstrated inplane bending, out of plane bending, and underactuated compliant gripping. In-plane bending mechanisms have achieved up to 150 • of deflection, out of plane bending mechanisms have achieved up to 90 • bending perpendicular to the surface of the chip, and the 4.4 mm x 3.8 mm x 0.3 mm gripper can passively grip objects up to 1.5 mm in size and as small as 0.5 mm. The mechanisms demonstrated can be used as actuated portions of larger mechanisms, for out-of-plane assembly, or for on-chip manipulation.978-1-4799-6934-0/14/$31.00 ©2014 IEEE

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“…Likewise, compliant mechanisms (Howell, 2001) perform the same tasks via the deflections of the flexible members. It is essential during the design process to perform kinematic and static analysis on mechanisms to understand if displacements, velocities, and accelerations are acceptable for the desired function and to determine the required loads to accomplish the predetermined function.…”

Section: Introductionmentioning

confidence: 99%

DAS-2D: a concept design tool for compliant mechanisms

Turkkan¹,

Su²

2016

Mech. Sci.

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Abstract.Compliant mechanisms utilize the deformation of the elastic members to achieve the desired motion. Currently, design and analysis of compliant mechanisms rely on several commercial dynamics and finite element simulation tools. However, these tools do not implement the most recently developed theories in compliant mechanism research. In this article, we present DAS-2D (Design, Analysis and Synthesis), a conceptual design tool which integrates the recently developed pseudo-rigid-body models and kinetostatic analysis/synthesis theories for compliant mechanisms. Coded in Matlab, the software features a kinematic solver for general rigid-body mechanisms, a kinetostatic solver for compliant mechanisms and a fully interactive graphical user interface. The implementation details of all modules of the program are presented and demonstrated with four different case studies. This tool can be beneficial to classroom teaching as well as engineering practices in design of compliant mechanisms.

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Compliant Mechanisms

Cited by 231 publications

References 3 publications

Principles of microscale flexure hinge design for enhanced endurance

Principles of microscale flexure hinge design for enhanced endurance

Magnetic actuation of ultra-compliant micro robotic mechanisms

DAS-2D: a concept design tool for compliant mechanisms

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