Integration of advanced stiffness-reduction techniques demonstrated in a 3D-printable joint

Merriam, Ezekiel G.; Tolman, Kyler A.; Howell, Larry L.

doi:10.1016/j.mechmachtheory.2016.07.009

Cited by 19 publications

(10 citation statements)

References 12 publications

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“…A smaller portion of the spiral could be more convenient in a practical embodiment. For example, multiple arcs configured with rotational symmetry, can result in a linear motion spring, similar to the one shown by Parise et al (2001). The G. Radaelli and J. L. Herder: Behaviour of a spiral spring with variations of cross-section, orthotropy and prestress 347 variations proposed in this study could enhance the out-ofplane compliance of such spring.…”

Section: Discussionsupporting

confidence: 57%

Study on the large-displacement behaviour of a spiral spring with variations of cross-section, orthotropy and prestress

Radaelli

Herder

2018

Mech. Sci.

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Abstract. This work is dedicated to the study of the large-displacement behaviour of a spiral spring. Parameters that influence the local torsion stiffness of the beam that constitutes the spiral are varied and their effect is studied. Cross-sectional shape, orthotropic material orientation and prestress are the three classes of parameters that are varied. The effect that the local change in torsional stiffness has on the overall behaviour is illustrated in a linearised way by comparing in-plane and out-of-plane stiffnesses, and nonlinearly, by inspecting a graphical representation of the potential energy field of the system. Several embodiments composed of multiple spirals are showed to illustrate how the understanding of the nonlinear behaviour could be exploited in conceptual design of compliant mechanisms.

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Section: Discussionsupporting

confidence: 57%

Study on the large-displacement behaviour of a spiral spring with variations of cross-section, orthotropy and prestress

Radaelli

Herder

2018

Mech. Sci.

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“…Based on the adaptive geometric components, robust concurrent topology optimization of porous infills and incompressible multi-materials with uncertain load are proved effectively [ 42 , 43 ] and expanded to optimize the coated structure with buckling constraints [ 44 ]. The CMs with lattice microstructures were used in the balancer and blade to fulfill tailoring stiffness, which demonstrates that the obtained CMs possess better mechanical performance than the traditional mechanisms [ 45 , 46 , 47 ]. In addition, studies on the functionally graded materials’ CMs have been applied to enhance the mechanical or geometric advantages with respect to traditional homogeneous CMs [ 48 , 49 , 50 ].…”

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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“…Many researchers have introduced AM technology into the manufacturing of compliant mechanisms. Merriam et al [20] proposed a flexure mechanism based on a truss-like lattice, which significantly improved the working stroke. Chen et al [21] studied comb-shaped flexible hinges.…”

Section: Introductionmentioning

confidence: 99%

Compliance Model and Structure Optimization Method Based on Genetic Algorithm for Flexure Hinge Based on X-Lattice Structure

Yin

Tan

2021

Complexity

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In order to obtain a new structure of beam flexure hinge with good performance, the flexure hinge based on the X-lattice structure is researched in this paper. The truss model in the finite element method is used to model the 6-DOF compliance of the flexure hinge based on the X-lattice structure. The influence of structural parameters on the compliance and compliance ratio of flexure hinges is analyzed based on this model, and the performance is compared with the traditional beam flexure hinge of the same size. In order to design a flexure hinge based on the X-lattice structure with good comprehensive performance, this paper proposes an intelligent structure optimization method based on a genetic algorithm. The feasibility of the optimization algorithm is verified by an example.

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Integration of advanced stiffness-reduction techniques demonstrated in a 3D-printable joint

Cited by 19 publications

References 12 publications

Study on the large-displacement behaviour of a spiral spring with variations of cross-section, orthotropy and prestress

Study on the large-displacement behaviour of a spiral spring with variations of cross-section, orthotropy and prestress

Topology Optimization for Hybrid Lattice Compliant Mechanisms with Multiple Microstructures

Compliance Model and Structure Optimization Method Based on Genetic Algorithm for Flexure Hinge Based on X-Lattice Structure

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