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pro vyhledávání: '"Holmes, Douglas P."'
When a pair of parallel buckling beams of unequal width make lateral contact under increasing compression, eventually either the thin or the thick beam will snap, leading to collective motion of the beam pair. Using experiments and FEM simulations, w
Externí odkaz:
http://arxiv.org/abs/2401.11811
Autor:
Holmes, Douglas P.
How do we characterize the shape of a surface? It is now well understood that the shape of a surface is determined by measuring how curved it is at each point. From these measurements, one can identify the directions of largest and smallest curvature
Externí odkaz:
http://arxiv.org/abs/2303.13615
A collection of thin structures buckle, bend, and bump into each-other when confined. This contact can lead to the formation of patterns: hair will self-organize in curls; DNA strands will layer into cell nuclei; paper, when crumpled, will fold in on
Externí odkaz:
http://arxiv.org/abs/2210.11324
Publikováno v:
Physical Review E (Vol. 108, Issue 3) (2023)
Thin sheets respond to confinement by smoothly wrinkling, or by focusing stress into small, sharp regions. From engineering to biology, geology, textiles, and art, thin sheets are packed and confined in a wide variety of ways, and yet fundamental que
Externí odkaz:
http://arxiv.org/abs/2209.05660
Autor:
Guerra, Arman, Holmes, Douglas P.
Publikováno v:
Soft Matter, 2021, 17, 7662-7669
It is possible to build free-standing, load-bearing structures using only rocks and loops of elastic material. We investigate how these structures emerge, and find that the necessary maximum loop spacing (the critical spacing) is a function of the fr
Externí odkaz:
http://arxiv.org/abs/2109.03265
Autor:
Stein-Montalvo, Lucia, Lee, Jeong-Ho, Yang, Yi, Landesberg, Melanie, Park, Harold S., Holmes, Douglas P.
In bistable actuators and other engineered devices, a homogeneous stimulus (e.g. mechanical, chemical, thermal, or magnetic) is often applied to an entire shell to initiate a snap-through instability. In this work, we demonstrate that restricting the
Externí odkaz:
http://arxiv.org/abs/2108.09902
We performed dynamic pressure buckling experiments on defect-seeded spherical shells made of a common silicone elastomer. Unlike in quasi-static experiments, shells buckled at ostensibly subcritical pressures (i.e. below the experimentally-determined
Externí odkaz:
http://arxiv.org/abs/2104.02554
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Confined thin structures are ubiquitous in nature. Spatial and length constraints have led to a number of novel packing strategies at both the micro-scale, as when DNA packages inside a capsid, and the macro-scale, seen in plant root development and
Externí odkaz:
http://arxiv.org/abs/1911.11913