Zobrazeno 1 - 10
of 323
pro vyhledávání: '"BIGGINS, JOHN"'
Shape-programmed sheets morph from one surface into another upon activation by stimuli such as illumination, and have attracted much interest for their potential engineering applications, especially in soft robotics. Complex shape changes can be achi
Externí odkaz:
http://arxiv.org/abs/2405.21024
We combine theory and experiments to explore the kinematics and actuation of intrinsically curved folds (ICFs) in otherwise developable shells. Unlike origami folds, ICFs are not bending isometries of flat sheets, but arise via non-isometric processe
Externí odkaz:
http://arxiv.org/abs/2309.01088
Publikováno v:
Phys. Rev. Lett. 131 (2023) 148202
Liquid crystal elastomer films that morph into cones are strikingly capable lifters. Thus motivated, we combine theory, numerics, and experiments to reexamine the load-bearing capacity of conical shells. We show that a cone squashed between frictionl
Externí odkaz:
http://arxiv.org/abs/2303.13306
Liquid crystal elastomers (LCEs) are soft phase-changing solids that exhibit large reversible contractions upon heating, Goldstone-like soft modes and resultant microstructural instabilities. We heat a planar LCE slab to isotropic, clamp the lower su
Externí odkaz:
http://arxiv.org/abs/2303.07215
Autor:
Giudici, Andrea, Biggins, John S.
Spontaneous material shape changes, such as swelling, growth or thermal expansion, can be used to trigger dramatic elastic instabilities in thin shells. These instabilities originate in geometric incompatibility between the preferred extrinsic and in
Externí odkaz:
http://arxiv.org/abs/2204.07342
Publikováno v:
In European Journal of Mechanics / A Solids November-December 2024 108
Publikováno v:
In Extreme Mechanics Letters May 2024 68
Publikováno v:
Proc. R. Soc. A. 478:20220230.20220230 (2022)
A flat sheet programmed with a planar pattern of spontaneous shape change will morph into a curved surface. Such metric mechanics is seen in growing biological sheets, and may be engineered in actuating soft matter sheets such as phase-changing liqui
Externí odkaz:
http://arxiv.org/abs/2102.04955
Autor:
Giudici, Andrea, Biggins, John S.
A cylindrical rubber fibre subject to twist will also elongate: a manifestation of Poynting's effect in large strain elasticity. Here, we construct an analogous treatment for an active rubber fibre actuated via an axisymmetric pattern of spontaneous
Externí odkaz:
http://arxiv.org/abs/2012.09461
Autor:
Giudici, Andrea, Biggins, John S.
We propose that ballooning can be controlled, enriched and amplified by using rubbery networks of aligned molecular rods known as liquid crystal elastomers (LCEs). Firstly, LCEs are promising artificial muscles, showing large spontaneous deformations
Externí odkaz:
http://arxiv.org/abs/2008.11960