A Bar and Hinge Model for Simulating Bistability in Origami Structures With Compliant Creases

Yi, Zhu; Filipov, Evgueni T.

doi:10.1115/1.4045955

Cited by 28 publications

(20 citation statements)

References 18 publications

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“…However these bar and hinge models have limited ca-pability of capturing localized behaviors. The SWOMPS implementation can mesh an origami to have compliant creases which are important for capturing the geometry, mechanics, and actuation of many active origami [21,22]. Figure 1 (b) shows a folding simulation of an origami flower using the bar and hinge model with compliant creases.…”

Section: Multi-physics Simulation For Active Origamimentioning

confidence: 99%

“…The compliant creases are developed by adding additional bar elements and rotational spring elements in the crease region that has a distributed width. The derivation of the compliant crase model, and its verification against finite element simulations and physical experiments is presented in [21,22].…”

Section: Multi-physics Simulation For Active Origamimentioning

confidence: 99%

“…1). The program includes stiffness definitions from [17,19] and can perform a more advanced meshing of the origami pattern to include compliant creases as proposed in [21,22]. The simulation framework incorporates one model to capture the heat transfer within origami and can simulate the thermo-mechanically coupled actuation of origami systems [23].…”

Section: Introductionmentioning

confidence: 99%

“…Summary of current capabilities within the Sequentially Working Origami Multi-Physics Simulator(SWOMPS) package. This SWOMPS program integrates a number of origami models including a compliant hinge bar and hinge model [21,22], a origami inter-panel contact model [24], a bar and hinge based heat transfer model [23], as well as the standard bar and hinge model for large deformation loading of origami [16]. These models are verified using FE simulations and physical experiments and the comparisons are presented in the individual references.…”

Section: Introductionmentioning

confidence: 99%

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Sequentially Working Origami Multi-Physics Simulator (SWOMPS): A Versatile Implementation

Filipov

2021

Volume 8B: 45th Mechanisms and Robotics Conference (MR)

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This work presents the underlying implementation of a new origami simulator (SWOMPS) that allows for adaptability and versatility with sequential analyses and multi-physical behaviors of active origami systems. The implementation allows for easy updating of origami properties, realistic simulation with multi-physics based actuation, and versatile application of different loadings in arbitrary number and sequence. The presented simulator can capture coupling between multiple origami behaviors including electro-thermo-mechanical actuation, heat transfer, self-stress induced folding, inter panel contact, applied loading forces, and kinematic/mechanical deformations. The simulator contains five different solvers, including three for mechanical loading, one for self-folding, and one for thermal loading. The paper presents details of this code package and uses three practical examples to highlight the versatility and efficiency of the package. Because various loadings and different origami behaviors can be modeled simultaneously and/or sequentially, this simulator is well suited for capturing origami behaviors in practical real-world scenarios. Furthermore, the ability to apply an arbitrary number and sequence of loadings is useful for design, optimization, or system control studies where an unknown set of loads are needed to fold functional active origami. The coded implementation for this simulator and additional examples are made available to encourage future expansions of this work where new sequential and multi-physical behaviors in origami can be explored.

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Section: Multi-physics Simulation For Active Origamimentioning

confidence: 99%

Section: Multi-physics Simulation For Active Origamimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sequentially Working Origami Multi-Physics Simulator (SWOMPS): A Versatile Implementation

Filipov

2021

Volume 8B: 45th Mechanisms and Robotics Conference (MR)

Self Cite

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“…The model can capture the mechanics and the stiffness of crease folding, panel bending, panel stretching and shearing within an origami. Recent advancements of the bar and hinge model have enabled it to simulate the compliant creases [29], [30] and panel contact [31] within active origami systems. However, these models do not consider the heat-transfer aspects of the origami and thus cannot be used to estimate the crease temperature and resulting folding angle of creases.…”

Section: Related Workmentioning

confidence: 99%

Rapid Multi-Physics Simulation for Electro-Thermal Origami Systems

Zhu,

Filipov

2021

Preprint

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Electro-thermally actuated origami provides a novel method for creating 3-D systems with advanced morphing and functional capabilities. However, it is currently difficult to simulate the multi-physical behavior of such systems because the electro-thermal actuation and large folding deformations are highly interdependent. In this work, we introduce a rapid multi-physics simulation framework for electro-thermal origami robotic systems that can capture: thermo-mechancially coupled actuation, inter panel contact, heat transfer, large deformation folding, and other complex loading applied onto the origami. Comparisons with finite element simulations validate the proposed framework for capturing origami heat transfer with different system geometries, materials, and surrounding environments. Verification against physical electro-thermal micro origami further demonstrates the validity of the proposed model. Simulations of more complex origami patterns and a case study for origami optimization are provided as application examples to show the capability and efficiency of the model. The framework provides a novel simulation tool for analysis, design, control, and optimization of active origami robotic systems, pushing the boundary for feasible morphing and functional capability.

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Elastically and Plastically Foldable Electrothermal Micro‐Origami for Controllable and Rapid Shape Morphing

Birla

Oldham

et al. 2020

Adv Funct Materials

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Integrating origami principles within traditional microfabrication methods can produce shape morphing microscale metamaterials and 3D systems with complex geometries and programmable mechanical properties. However, available micro-origami systems usually have slow folding speeds, provide few active degrees of freedom, rely on environmental stimuli for actuation, and allow for either elastic or plastic folding but not both. This work introduces an integrated fabrication-design-actuation methodology of an electrothermal micro-origami system that addresses the above-mentioned challenges. Controllable and localized Joule heating from electrothermal actuator arrays enables rapid, large-angle, and reversible elastic folding, while overheating can achieve plastic folding to reprogram the static 3D geometry. Because the proposed micro-origami do not rely on an environmental stimulus for actuation, they can function in different atmospheric environments and perform controllable multi-degrees-of-freedom shape morphing, allowing them to achieve complex motions and advanced functions. Combining the elastic and plastic folding enables these micro-origami to first fold plastically into a desired geometry and then fold elastically to perform a function or for enhanced shape morphing. The proposed origami systems are suitable for creating medical devices, metamaterials, and microrobots, where rapid folding and enhanced control are desired.

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A Bar and Hinge Model for Simulating Bistability in Origami Structures With Compliant Creases

Cited by 28 publications

References 18 publications

Sequentially Working Origami Multi-Physics Simulator (SWOMPS): A Versatile Implementation

Sequentially Working Origami Multi-Physics Simulator (SWOMPS): A Versatile Implementation

Rapid Multi-Physics Simulation for Electro-Thermal Origami Systems

Elastically and Plastically Foldable Electrothermal Micro‐Origami for Controllable and Rapid Shape Morphing

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