Article
Chemistry, Multidisciplinary
David Melancon, Antonio Elia Forte, Leon M. Kamp, Benjamin Gorissen, Katia Bertoldi
Summary: This paper proposes a modular inflatable structure designed with multistability, which can switch between different deformation modes in response to a single input signal. This approach eliminates the one-to-one relation between input signal and deformation mode in inflatable systems.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Mechanical
Todd G. Nelson, Luis M. Baldelomar Pinto, Jared T. Bruton, Zhicheng Deng, Curtis G. Nelson, Larry L. Howell
Summary: The study demonstrates the ability to create an approximate curved surface by applying opposing tip loads using a model with a system of rigid links joined by torsional springs. A set of equations describing the shape of the surface during deployment is developed, and compliant torsion bars are used as torsion springs in the physical implementation. An optimization algorithm is presented to minimize errors and consider manufacturing and stress factors in the torsion bars.
JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME
(2021)
Article
Chemistry, Multidisciplinary
Robert Baines, Sree Kalyan Patiballa, Benjamin Gorissen, Katia Bertoldi, Rebecca Kramer-Bottiglio
Summary: Programming inflatable systems to deform to desired 3D shapes through attaching discrete strain limiters to cylindrical hyperelastic inflatables holds great potential in robotics, morphing architecture, and interventional medicine. A method is proposed to solve the inverse problem of programming numerous 3D centerline curves during inflation by using a reduced-order model and finite element simulation. By leveraging this framework, various functionalities of cylindrical inflatables, such as 3D curve matching, self-tying knotting, and manipulation, can be achieved through a priori programmed deformations. These results are of broad significance for the emerging computational design of inflatable systems.
ADVANCED MATERIALS
(2023)
Article
Engineering, Mechanical
Rinki Imada, Tomohiro Tachi
Summary: This paper proposes a kinematic model for the waterbomb tube and investigates its behavior by parameterizing the geometry and deriving a recurrence relation between the modules of the waterbomb tessellation. Through visualization, solutions are classified into cylinder, wave-like, and finite solutions. Analyzing the stability and bifurcation of the dynamical system, the changes in the waterbomb tube's behavior with changes in the crease pattern are examined. Furthermore, the existence of a wave-like solution around one of the cylinder solutions is proven.
JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME
(2022)
Article
Nanoscience & Nanotechnology
Yanhua Sun, Dengfeng Li, Mengge Wu, Yale Yang, Jingyou Su, Tszhung Wong, Kangming Xu, Ying Li, Lu Li, Xinge Yu, Junsheng Yu
Summary: Origami has become an optimal method for creating complex 3D structures and soft robots. The electrically controllable origami deformation allows soft robots to be used as soft manipulators, providing a variety of functions.
MICROSYSTEMS & NANOENGINEERING
(2022)
Article
Engineering, Aerospace
Xuan Zhou, Shiming Zhou, Daokui Li, Anfeng Zhou
Summary: This paper proposes a new direct folding method for modeling and studying the deployment process of cylindrical airbags. The method is reasonable and feasible, and achieves good results in landing buffer analysis.
JOURNAL OF AEROSPACE ENGINEERING
(2022)
Article
Engineering, Mechanical
Jared Butler, Jacob Greenwood, Larry L. Howell, Spencer Magleby
Summary: This paper introduces extramobile and intramobile motions of developable mechanisms, discussing the determinacy and influencing factors when designing cylindrical developable mechanisms under certain conditions.
JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME
(2021)
Article
Chemistry, Analytical
Yongqi Shi, Gang Wang, Wenguang Sun, Yunfeng Ya, Shuhan Liu, Jiongjie Fang, Feiyang Yuan, Youning Duo, Li Wen
Summary: In this study, a millimeter-scale soft sensor was developed using liquid metal printing technology and self-folding origami parallel mechanism. The sensor can be manufactured within a plane and then fold into a three-dimensional shape. The results showed that the sensor can self-fold and achieve up to 20 mm deformation at the tip. The sensor is capable of measuring external loads in six directions and enables underwater sensing with a minimum sensitivity of 20 mm/s water flow.
Article
Multidisciplinary Sciences
Yi Zhu, Evgueni T. Filipov
Summary: This work utilizes interpretable machine learning methods to address the challenging inverse design problem of origami-inspired systems. By establishing a workflow based on decision tree-random forest method, it fits origami databases and generates human-understandable decision rules for the inverse design of functional origami, considering multi-objective and non-geometrical performance.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Mechanical
Sicong Liu, Jianhui Liu, Kehan Zou, Xiaocheng Wang, Zhonggui Fang, Juan Yi, Zheng Wang
Summary: Soft manipulators are attracting increasing interest in robotics due to their potential applications in unstructured environments and human-robot interaction. However, traditional soft manipulators lack the ability to simultaneously output twisting and lateral translations. This study focuses on a tilted actuator soft robotic joint with 6DOF mobility, which demonstrates the potential for constructing dexterous and lightweight robotic systems.
JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Mechanical
Hongying Zhang, Huijuan Feng, Jian-Lin Huang, Jamie Paik
Summary: Origami robots are capable of self-reconfiguration, multi-dimensional transformation, and multi-material connections, in which semi-rigid connections play a crucial role in the accuracy of the model.
EXTREME MECHANICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Lei Yu, Jin Cheng, Dongfang Wang, Victor Pan, Shuai Chang, Jie Song, Yonggang Ke
Summary: Programmable DNA nanotechnology has been widely used in various applications, and minimizing mechanical stress is an important design rule for DNA nanostructures. This study compares the self-assembly of a canonical DNA gridiron with a new design that has a higher degree of mechanical stress. The interweaving DNA gridiron exhibits lower yield but promotes the formation of a two-dimensional crystalline lattice. Tuning the design of interweaving gridiron leads to changes in crystal size and regularity. The discovery of the new role of mechanical stress provides useful knowledge for future DNA nanostructure design.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Tianqing Zhang, Bryan Wei
Summary: Sequence complementarity is crucial in designing specific recognition among DNA nanostructure units through sticky-end cohesion. Binding orthogonality is usually achieved through sticky-end pairs with different sequences. This study explores orthogonal recognition of synthetic DNA constructs solely based on configurational match, by restricting the diversity of sticky-end sequences to a fixed C-G pair. Comprehensive investigations of 2D tessellation and 3D crystallization demonstrate the ability of this new configuration-specific sticky-end cohesion to program specific and precise molecular recognition for high-order DNA self-assembly.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Review
Chemistry, Multidisciplinary
Sophie Leanza, Shuai Wu, Xiaohao Sun, H. Jerry Qi, Ruike Renee Zhao
Summary: Origami has played an important role in engineering structure design, and the integration of active materials enables lightweight, programmable, and self-deployable structures for various applications in aerospace, metamaterials, and biomedical fields.
ADVANCED MATERIALS
(2023)
Article
Biology
Linfeng Cao, Ziwen Meng, Junjie Tan, Ming Ying, Meiying Bi, Yanjun Liu, Xinrui Tong, Jiaxun Wei, Lei Huang
Summary: This study developed DNA nanoparticles (citZ-boxes) for automatic loading and releasing of cargo. Using restriction enzyme cleavage, the enhanced green fluorescent protein (eGFP) gene was delivered into B. subtilis protoplasts, resulting in eGFP expression.
COMMUNICATIONS BIOLOGY
(2022)
Article
Engineering, Mechanical
Collin Ynchausti, Nathan Brown, Spencer P. Magleby, Anton E. Bowden, Larry L. Howell
Summary: This paper introduces the design and application of deployable Euler spiral connectors (DESCs). Compact compliant mechanisms can be designed using a combination of series and parallel Euler spiral beam models. The force-deflection behavior and stress of DESCs are validated through comparisons with finite element analysis and experimental data.
JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Mechanical
Brandon S. Sargent, Collin R. Ynchausti, Todd G. Nelson, Larry L. Howell
Summary: This paper presents a method for predicting the endpoint coordinates, stress, and force of stepped cantilever beams under large deflections. The method, called the mixed-body model (MBM), combines small deflection theory with the pseudo-rigid-body model for large deflections. Through comparisons with other models, finite element analysis, numerical boundary value solutions, and physical prototypes, the MBM is proven to provide accurate results in various scenarios. Optimization of the MBM parameters further improves the consistency and reduces the error.
JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Mechanical
Robert J. Lang, Larry L. Howell
Summary: This study presents a compliant joint that allows near-revolute joint motion over a large folding angle, making it suitable for origami and kirigami mechanisms that preserve the kinematic behavior of zero-thickness idealizations based on perfect folds.
EXTREME MECHANICS LETTERS
(2022)
Article
Engineering, Mechanical
Nathan C. Brown, Collin Ynchausti, Amanda Lytle, Larry L. Howell, Spencer P. Magleby
Summary: This paper introduces a visual and iterative approach to eliminating redundant constraints in origami-based mechanisms through joint removal, and provides examples of several techniques for joint removal.
JOURNAL OF MECHANICAL DESIGN
(2022)
Article
Engineering, Mechanical
Diana Bolanos, Collin Ynchausti, Nathan Brown, Hunter Pruett, Jared Hunter, Brooklyn Clark, Terri Bateman, Larry L. Howell, Spencer P. Magleby
Summary: The Miura-ori pattern has favorable qualities for designing deployable space arrays, but also poses challenges such as thickness-accommodation, nesting, grounding, and deployment. It is important to address and mitigate these challenges when designing Miura-ori systems.
MECHANISM AND MACHINE THEORY
(2022)
Article
Multidisciplinary Sciences
Akash Biswas, Constantinos L. Zekios, Collin Ynchausti, Larry L. Howell, Spencer P. Magleby, Stavros Georgakopoulos
Summary: Designers face the challenge of balancing the trade-off between manufacturing cost and performance as they aim to increase the bandwidth of absorbers. To address this challenge, researchers propose a new approach that combines origami math with electromagnetics to develop an ultra-wideband absorber with minimal fabrication and assembly cost. This novel design successfully achieves an absorptivity above 90% in a 24.6:1 bandwidth, demonstrating the potential for practical applications in mitigating signal interference.
SCIENTIFIC REPORTS
(2022)
Article
Mathematics
Dylan C. Webb, Elissa Reynolds, Denise M. Halverson, Larry L. Howell
Summary: This article introduces a new design for smooth sheet attachment that can unfold simultaneously with zipper-coupled tubes to cover the entire surface without additional actuation, and it is compatible with asymmetric zipper-coupled tubes.
Article
Engineering, Mechanical
Diana Bolanos, Katie Varela, Brandon Sargent, Mark A. Stephen, Larry L. Howell, Spencer P. Magleby
Summary: The design parameters, objectives, and trade-offs of origami flasher pattern configurations are the focus of this paper, with a goal to improve understanding and enable engineering applications. The methods presented aim to provide clarity on the effects of tuning flasher parameters based on existing synthesis tools. The results are demonstrated through the design of a flasher-based deployable LiDAR telescope, where optimization is used to converge on optimal design parameters and implemented in proof-of-concept hardware.
JOURNAL OF MECHANICAL DESIGN
(2023)
Article
Engineering, Mechanical
Hunter T. Pruett, Abdul-Sattar Kaddour, Stavros V. Georgakopoulos, Larry L. Howell, Spencer P. Magleby
Summary: Trends in the aerospace industry drive the need for smaller, cheaper, yet high-gain antennas. This study presents a thick, flat-foldable origami design, called volume-efficient Miura-ori (VEMO), for deployable reflectarray antennas. By maximizing the surface area while meeting volume and aspect ratio constraints, the VEMO design offers an efficient solution for antenna applications.
EXTREME MECHANICS LETTERS
(2022)
Article
Sport Sciences
Barnaby Sargent Megicks, Kevin Till, Fieke Rongen, Ian Cowburn, Adam Gledhill, Thomas Mitchell, Stacey Emmonds, Sergio Lara-Bercial
Summary: Talent Development Environments (TDEs) are designed to provide the appropriate conditions for youth athletes to realize their full sporting potential, and how they are designed and operated is of great importance for the development of elite athletes. This study assessed the quality of TDEs across 5 European countries, comparing athlete, parent and coach perceptions. Overall, perceptions of European TDEs were positive. Coaches reported higher perceptions of TDE quality compared to athletes and parents, athletes reported marginally higher perceptions compared to parents. Stakeholder perceptions varied most for the Holistic Quality Preparation subscale, highlighting perceived differences in TDE support for rounded athlete development. From an organizational perspective, identified strengths and weaknesses provide direction to coach and parent education. Practically, TDE leaders should consider how they can refine stakeholder coordination through integrating stakeholder perceptions as valuable feedback into their environment, especially for intangible factors.
JOURNAL OF SPORTS SCIENCES
(2022)
Article
Engineering, Mechanical
Mohui Jin, Collin Ynchausti, Larry L. Howell
Summary: Euler spiral beams can lay flat when proper loads are applied, enabling them to be used in compact deployable compliant mechanisms. However, the conditions for zero-curvature deformation and effective models for predicting deformation are still unclear. This paper describes the shape of Euler spirals using size-independent quantities and derives the large-deflection equations for Euler spiral beams. The zero-curvature deformation properties and conditions are studied, and a 3R pseudo-rigid-body model is proposed. The results facilitate the use of zero-curvature deformation in developing compact mechanisms and analyzing large deflection of Euler spiral beams.
MECHANISM AND MACHINE THEORY
(2023)
Article
Biophysics
Brandon Sargent, Diana Bolanos, Victor Garcia, Larry Howell
Summary: Understanding the force-deflection behavior of the sternum is crucial for designing implant devices for chest wall deformity repair. This study utilizes empirical data to develop models and finds age and gender differences in the behavior. The results show that stiffness of the sternum varies with age, with childhood, adolescence, and adulthood exhibiting different patterns.
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2023)
Article
Engineering, Mechanical
Collin Ynchausti, Spencer Shirley, Spencer P. Magleby, Larry L. Howell
Summary: This work proposes a method for creating hinge-like motion using internal membranes between rigid panels. Two configurations, RadiCEL and RC-ReCS, are described for planar, single-folding mechanisms. The adjustability of these configurations is discussed to meet various design requirements. A comparison is made, focusing on axial parasitic motion. The application of the RadiCEL hinge in a foldable metasurface antenna is also presented.
MECHANISM AND MACHINE THEORY
(2023)
Article
Multidisciplinary Sciences
Brandon Sargent, Katie Varela, Dennis Eggett, Emily McKenna, Christina Bates, Rebeccah Brown, Victor Garcia, Larry Howell
Summary: Pectus carinatum, a chest wall deformity, can be effectively treated using external braces. Empirical studies were conducted on 185 patients from 2018 to 2020 to analyze the severity of the deformity, treatment pressures, and time of wear. Two statistical models were created to predict changes in pressure and response in the chest wall due to prolonged bracing. These models show significant correlations between pressure, time, and changes in the deformity, and can aid in treatment planning and design of future treatment systems.
Editorial Material
Multidisciplinary Sciences
Larry L. Howell, Terri Bateman
Summary: The availability of maker resources allows researchers to share information with various audiences, expanding the impact of research and inspiring its extension and application.
NATURE COMMUNICATIONS
(2023)
