Mechanics of paper-folded origami: A cautionary tale

Grey, Steven; Scarpa, Fabrizio; Schenk, Mark

doi:10.1016/j.mechrescom.2020.103540

Cited by 21 publications

(7 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Paper possesses a low bending stiffness enabling easy folding and bending of the material, but repeated folding of face-to-face combined papers also can lead to the delamination of the paper. 54 Thus, a gap is formed at the crease location, which is schematically presented in Figure 2c. The primary folded sensor assembly with the crease gap is termed the Control Device.…”

Section: Resultsmentioning

confidence: 99%

Origami-Inspired Conductive Paper-Based Folded Pressure Sensor with Interconnection Scaling at the Crease for Novel Wearable Applications

Karmakar,

Huang,

Chu

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Drawing inspiration from origami structures, a pressure sensor was developed with unique interconnection scaling at its creases crafted on a conductive paper substrate, paving the way for advanced wearable technology. Two screen-printed conductive paper substrates were combined face-to-face, and specific folds were introduced to optimize the sensor structure. The Electrical Contact Resistance (ECR) was systematically analyzed across different fold numbers and crease gaps, revealing a notable trade-off: while increasing the number of folds expanded the sensing area, it also influenced the ECR, reaching a performance plateau. Strategic modifications in the sensor's design, including refining interconnections at the crease, enhanced its sensitivity and stability, culminating in a remarkable sensitivity of 3.75 kPa −1 at subtle pressure levels (0−0.05 kPa). This sensor's real-world applications proved to be transformative, from detecting bruxism and aiding in neck posture correction to remotely sensing trigger finger locking phenomena, highlighting its potential as a pivotal tool in upcoming medical diagnostics and treatments.

show abstract

Section: Resultsmentioning

confidence: 99%

Origami-Inspired Conductive Paper-Based Folded Pressure Sensor with Interconnection Scaling at the Crease for Novel Wearable Applications

Karmakar,

Huang,

Chu

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Contrary to rigid-faces origami design, the creases' network's choice does not limit the origami to a single configuration. The shape and the resulting properties are finely tunable after folding not only with local bistability [2], but also through the precise changes of the rest angles [24]. However, quantitative applications will require a more in-depth elastic and geometric modeling of the complex competition between the creases and the faces' resulting deformations.…”

Section: Discussionmentioning

confidence: 99%

“…To study the relation between the shape of the origami and the pattern of folds, we manually folded curvedaccordions from 100 µm thick polyethylene terephthalate (mylar) flat sheets with a various number of creases (9 to 22), length l (10 mm to 140 mm), and width w (9 mm to 20 mm). Contrary to paper sheets, where the damage produced during the folding process yields unknown crease properties [24], mylar sheets generate folds with a reproducible stiffness based on the elastic properties of the material [25]. After initial folding, we deployed each origami by pulling on the faces manually to set the rest angle Ψ 0 at approximately 90°.…”

Section: Folding Pattern and Experimentsmentioning

confidence: 99%

Curving Origami with Mechanical Frustration

Jules¹,

Lechenault²,

Adda-Bedia³

2021

Preprint

View full text Add to dashboard Cite

We study the three-dimensional equilibrium shape of a shell formed by a deployed accordion-like origami, made from an elastic sheet decorated by a series of parallel creases crossed by a central longitudinal crease. Surprisingly, while the imprinted crease network does not exhibit a geodesic curvature, the emergent structure is characterized by an effective curvature produced by the deformed central fold. Moreover, both finite element analysis and manually made mylar origamis show a robust empirical relation between the imprinted crease network's dimensions and the apparent curvature. A detailed examination of this geometrical relation shows the existence of three typical elastic deformations, which in turn induce three distinct types of morphogenesis. We characterize the corresponding kinematics of crease network deformations and determine their phase diagram. Taking advantage of the frustration caused by the competition between crease stiffness and kinematics of crease network deformations, we provide a novel tool for designing curved origami structures constrained by strong geometrical properties.

show abstract

“…Crease folding energy takes the form of a classical, however nonlinear, membrane energy. In what follows, we neglect this contribution and focus on the less-explored influence of panel bending [27]. For "Mars"-folded origami pillars, centered about the equator, strain energy is exemplified on Fig.…”

Section: Self-equilibrium Of Origami Pillarsmentioning

confidence: 99%

Strain compatibility and gradient elasticity in morphing origami metamaterials

Nassar,

Lebée,

Werner

2022

Preprint

View full text Add to dashboard Cite

The principles of origami design have proven useful in a number of technological applications. Origami tessellations in particular constitute a class of morphing metamaterials with unusual geometric and elastic properties. Although inextensible in principle, fine creases allow origami metamaterials to effectively deform non-isometrically. Determining the strains that are compatible with coarse-grained origami kinematics as well as the corresponding elasticity functionals is paramount to understanding and controlling the morphing paths of origami metamaterials. Here, within a unified theory, we solve this problem for a wide array of well-known origami tessellations including the Miura-ori as well as its more formidable oblique, non-developable and non-flat-foldable variants. We find that these patterns exhibit two universal properties. On one hand, they all admit equal but opposite in-plane and out-of-plane Poisson's ratios. On the other hand, their bending energy detaches from their in-plane strain and depends instead on the strain gradient. The results are illustrated over a case study of the self-equilibrium geometry of origami pillars.

show abstract

Mechanics of paper-folded origami: A cautionary tale

Cited by 21 publications

References 26 publications

Origami-Inspired Conductive Paper-Based Folded Pressure Sensor with Interconnection Scaling at the Crease for Novel Wearable Applications

Origami-Inspired Conductive Paper-Based Folded Pressure Sensor with Interconnection Scaling at the Crease for Novel Wearable Applications

Curving Origami with Mechanical Frustration

Strain compatibility and gradient elasticity in morphing origami metamaterials

Contact Info

Product

Resources

About