Evolutionary optimization of compliant mechanisms subjected to non-uniform thermal effects

Ansola, Rubén; Veguería, Estrella; Canales, J.; Alonso, Cristina

doi:10.1016/j.finel.2012.03.003

Cited by 22 publications

(8 citation statements)

References 36 publications

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“…Rodrigues and Fernandes 1995;Li et al 2001a;Gao and Zhang 2010;Deaton and Grandhi 2013) and the application to the design of thermomechanical compliant mechanisms (e.g. Sigmund 2001;Ansola et al 2012). Recently, Zhu et al (2016) presented a shape preserving design method for topology optimization.…”

Section: Approach: Simultaneous Multicomponent Multidisciplinary Topomentioning

confidence: 99%

Topology optimization of multicomponent optomechanical systems for improved optical performance

Koppen

Kolk

Kempen

et al. 2018

Struct Multidisc Optim

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The stringent and conflicting requirements imposed on optomechanical instruments and the ever-increasing need for higher resolution and quality imagery demands a tightly integrated system design approach. Our aim is to drive the thermomechanical design of multiple components through the optical performance of the complete system. To this end, we propose a new method combining structural-thermal-optical performance analysis and topology optimization while taking into account both component and system level constraints. A 2D two-mirror example demonstrates that the proposed approach is able to improve the system's spot size error by 95% compared to uncoupled system optimization while satisfying equivalent constraints. Keywords Topology optimization • Multidisciplinary design optimization • System optimization • Optical instrumentation • Optomechanics • Thermoelasticity • Structural-thermal-optical-performance analysis 1 Introduction 1.1 Optomechanical instruments Optomechanical instruments control light by means of optics and generally have to meet very stringent optical, mechanical and thermal requirements (e.g. Chin 1964; S. Koppen

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Section: Approach: Simultaneous Multicomponent Multidisciplinary Topomentioning

confidence: 99%

Topology optimization of multicomponent optomechanical systems for improved optical performance

Koppen

Kolk

Kempen

et al. 2018

Struct Multidisc Optim

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“…Colbert et al [9] conducted a review of the literature for thermoactuated flexures and developed models for the response of U-shaped flexures under steady state conditions. From the perspective of design methodologies, Zhao et al [10] report the use of topology optimization, while Ansola et al [11] used forward topology optimization thermocompliant mechanisms.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Topology optimization techniques have also been applied to the analysis of compliant thermoactuators. Ansola et al [11] worked on models with spatial varying thermal fields.…”

Section: Literature Reviewmentioning

confidence: 99%

Modal Analysis of a New Thermosensitive Actuator Design for Circuit Breakers Based on Mesoscale U-Shaped Compliant Mechanisms

Ahuett–Garza

Melecio

Orta

2018

Mathematical Problems in Engineering

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A new mesoscale thermosensitive actuator design for circuit breakers based on a U-shaped compliant mechanism was introduced as a potential replacement for bimetal strips in miniature circuit breakers. In a previous study, the response of this design to the thermal fields produced by a steady current flow was analyzed. This article presents a modal analysis of the compliant mechanism. The goal of the analysis is to compare the natural frequencies of the mechanism with the frequency of the magnetic loads caused by the flow of the alternating currents. Simulations with simple beam elements and 3D elements are presented and results are compared with experimental measurements. The study finds that the natural frequency of the mechanism differs by a factor of about 8 with the AC frequency. The conclusion is that the proposed compliant mechanism design’s performance as a thermal actuator will not be affected by the cyclic loads generated by the forces induced by the AC magnetic fields.

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“…Obviously the first three terms correspond to the variation of the output displacement with opposite signs (Ansola et al, 2012). Therefore:…”

Section: Optimality Criteriamentioning

confidence: 99%

Electro-thermal compliant mechanisms design by an evolutionary topology optimization method

Ansola

Veguería

Canales

et al. 2013

Engineering Computations

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Purpose -This paper aims to show an evolutionary topology optimization procedure for the design of compliant electro-thermal mechanisms. Design/methodology/approach -The adopted methodology is based in the evolutionary structural optimization (ESO) method. This approach has been successfully applied by this group for compliant mechanisms optimization under directly applied input loads and simple thermal loads. This work proposes an extension of this procedure, based on an additive version of the method, to solve the more complicated case of electro-thermal actuators optimum design, based on Joule's resistive heating. Findings -Examples solved for the design of plane compliant mechanisms are presented to check the validity of this technique. The designs obtained are compared favorably with results obtained by other authors to illustrate and validate the method, showing the viability of this technique for the optimization of compliant mechanisms under electro-thermal actuation.Research limitations/implications -This investigation is based on and additive version of the evolutionary method. Since this approach does not have the capability to remove material it could be combined with the classic element rejection evolutionary method to overcome these deficiencies, developing an improved bi-directional algorithm, which should be analyzed and applied for these types of designs in future works. Practical implications -Electro-thermal actuators have widespread use in MicroElectroMechanical Systems applications. Since these elements cannot be manufactured using typical assembly processes compliant mechanisms optimization play a crucial role for their successful design. The proposed methodology could help engineers to rapidly conceive complex and efficient actuators. Social implications -The topology optimization procedure developed in this paper enables systematic design of these devices, which can result in a save of manufacturing time and cost. Originality/value -Most applications of the ESO method have considered maximum stiffness structure design, and even if it has been successfully applied to some other optimum material distribution problems, electro-thermal actuators design has not been considered yet. This paper shows that this methodology could be useful also in the design of electro-thermal compliant mechanisms, and provides engineers with a very simple and practical alternative design tool.

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Evolutionary optimization of compliant mechanisms subjected to non-uniform thermal effects

Cited by 22 publications

References 36 publications

Topology optimization of multicomponent optomechanical systems for improved optical performance

Topology optimization of multicomponent optomechanical systems for improved optical performance

Modal Analysis of a New Thermosensitive Actuator Design for Circuit Breakers Based on Mesoscale U-Shaped Compliant Mechanisms

Electro-thermal compliant mechanisms design by an evolutionary topology optimization method

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