Folding of the triangular lattice in a discrete three-dimensional space is studied numerically. Such "discrete folding" was introduced by Bowick and co-workers as a simplified version of the polymerized membrane in thermal equilibrium. According to their cluster-variation method (CVM) analysis, there appear various types of phases as the bending rigidity K changes in the range -infinity
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http://dx.doi.org/10.1103/PhysRevE.72.036104 DOI Listing Publication Analysis
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Protein structures represent the key to deciphering biological functions. The more detailed form of similarity among these proteins is sometimes overlooked by the conventional structural comparison methods. In contrast, further advanced methods, such as Triangular Spatial Relationship (TSR), have been demonstrated to make finer differentiations.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
November 2024
Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ 08544.
The concepts of origami and kirigami have often been presented separately. Here, we put forth a synergistic approach-the folded kirigami-in which kirigami assemblies are complemented by means of folding, typical of origami patterns. Besides the emerging patterns themselves, the synergistic approach also leads to topological mechanical metamaterials.
View Article and Find Full Text PDFiScience
October 2024
Beijing University of Civil Engineering and Architecture, Beijing 102616, China.
3D building models have a complex structure and a large number of triangular meshes, which can put great pressure on computer real-time rendering. Therefore, the model needs to be simplified to reduce the number of meshes without affecting the overall visual effect of the model. The algorithm in this paper is based on triangle folding, which simplifies more but loses model details.
View Article and Find Full Text PDFPhys Rev E
September 2024
Advanced Structures Group, Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, United Kingdom.
When a simply supported thin disk is indented by a centrally applied point force, it buckles out-of-plane to form a shape dominated by two conical portions: a uniform region indenting against the support, interrupted by a smaller elevated portion detached from the support, altogether known as a "developable cone" or d-Cone. If a central circular region of the disk is clamped instead, then the buckling complexion changes markedly: The indenting region is interspersed with several detached and elevated cones, now "truncated," where their number depends on the clamping extent as well as the radius of the circular simple support. Studies of d-Cone kinematics often consider its shape as an analogous vertex, which forms by folding along hinge lines separating triangular facets.
View Article and Find Full Text PDFPhilos Trans A Math Phys Eng Sci
October 2024
Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA, USA.
Yoshimura origami is a classical folding pattern that has inspired many deployable structure designs. Its applications span from space exploration, kinetic architectures and soft robots to even everyday household items. However, despite its wide usage, Yoshimura has been fixated on a set of design constraints to ensure its flat foldability.
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