Design, simulation and testing of an isotropic compliant mechanism

Verotti, Matteo; Berselli, Giovanni; Bruzzone, Luca; Baggetta, Mario; Fanghella, Pietro

doi:10.1016/j.precisioneng.2021.07.018

Cited by 7 publications

(2 citation statements)

References 40 publications

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“…Compliant mechanisms (CMs) have attracted widespread attention and become an innovative research hotspot in recent decades because such mechanisms can achieve partial transformation of the displacement and force to greatly reduce the friction, lubrication, and assembly problems due to their deformation [ 1 , 2 ]. CMs are special mechanisms that obtain motions through the deflection of their compliant members.…”

Section: Introductionmentioning

confidence: 99%

Topology Optimization for Hybrid Lattice Compliant Mechanisms with Multiple Microstructures

Wei

Wang

et al. 2022

Materials

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Hybrid lattice compliant mechanisms (HLCMs) composed of multiple microstructures have attracted widespread interest due to their superior compliant performance compared to the traditional solid compliant mechanisms. A novel optimization scheme for HLCMs is presented using the independent continuous mapping (ICM) method. Firstly, the effective properties of multiple orthogonal and anisotropic lattice microstructures are obtained by taking advantage of homogenization theory, which are used to bridge the relationship between the macrostructure layout and microstructure recognition. Then, a new parallel topology optimization model for optimizing HLCMs is built via a generalized multi-material, recognizing interpolation scheme with filter functions. In addition, the characterization relationship between independent continuous variables and performance of different elements is established. Sensitivity analysis and linear programming are utilized to solve the optimal model. Lastly, numerical examples with a displacement inverter mechanism and compliant gripper mechanism demonstrate the effectiveness of the proposed method for designing HLCMs with various lattice microstructures. Anisotropic lattice microstructures (ALMs) significantly facilitate the efficient use of constitutive properties of materials. Hence, HLCMs consisting of various ALMs achieve superior compliant performance than counterparts comprising different orthogonal lattice microstructures (OLMs). The presented method offers a reference to optimize HLCMs, as well as promotes the theoretical development and application of the ICM method.

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Section: Introductionmentioning

confidence: 99%

Topology Optimization for Hybrid Lattice Compliant Mechanisms with Multiple Microstructures

Wei

Wang

et al. 2022

Materials

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“…However, complex serial-parallel configurations with curved flexure hinges/beams pose challenges to such a multifold target.Compliant mechanisms including serial-parallel configurations and curved flexure beams have attracted increasingly more attention due to their potential advantages. [7][8][9][10][11][12][13] For instance, curved flexure beams can enhance flexibility, while retaining a low stress level and small space. 14 Furthermore, the redundant geometric parameter of curvature can extend the design domain.…”

mentioning

confidence: 99%

Enabling the transfer matrix method to model serial–parallel compliant mechanisms including curved flexure beams

Ling,

Yuan,

Zeng

et al. 2024

Int Journal of Mech Sys Dyn

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Compliant mechanisms with curved flexure hinges/beams have potential advantages of small spaces, low stress levels, and flexible design parameters, which have attracted considerable attention in precision engineering, metamaterials, robotics, and so forth. However, serial–parallel configurations with curved flexure hinges/beams often lead to a complicated parametric design. Here, the transfer matrix method is enabled for analysis of both the kinetostatics and dynamics of general serial–parallel compliant mechanisms without deriving laborious formulas or combining other modeling methods. Consequently, serial–parallel compliant mechanisms with curved flexure hinges/beams can be modeled in a straightforward manner based on a single transfer matrix of Timoshenko straight beams using a step‐by‐step procedure. Theoretical and numerical validations on two customized XY nanopositioners comprised of straight and corrugated flexure units confirm the concise modeling process and high prediction accuracy of the presented approach. In conclusion, the present study provides an enhanced transfer matrix modeling approach to streamline the kinetostatic and dynamic analyses of general serial–parallel compliant mechanisms and beam structures, including curved flexure hinges and irregular‐shaped rigid bodies.

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On geometrically nonlinear mechanics of nanocomposite beams

Vaccaro

2022

International Journal of Engineering Science

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Design, simulation and testing of an isotropic compliant mechanism

Cited by 7 publications

References 40 publications

Topology Optimization for Hybrid Lattice Compliant Mechanisms with Multiple Microstructures

Topology Optimization for Hybrid Lattice Compliant Mechanisms with Multiple Microstructures

Enabling the transfer matrix method to model serial–parallel compliant mechanisms including curved flexure beams

On geometrically nonlinear mechanics of nanocomposite beams

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