Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Pal, Raj P."'
Autor:
Jui, Tamanna Akter, Pal, Raj Kumar
We investigate the existence of higher order topological localized modes in moir\'{e} lattices of bilayer elastic plates. Each plate has a hexagonal array of discrete resonators and one of the plates is rotated an angle ($21.78^\circ$) which results
Externí odkaz:
http://arxiv.org/abs/2310.00182
Autor:
Rahman, Adib, Pal, Raj Kumar
We report the experimental observation of an elastic bound mode in the continuum (BIC) in a compact region of an architected beam. We consider a long slender beam with rigid masses attached at periodic intervals, with a compact segment bounded by fou
Externí odkaz:
http://arxiv.org/abs/2309.02371
Autor:
Rahman, Adib, Pal, Raj Kumar
We analytically predict and numerically demonstrate the existence of a family of bound modes in the continuum (BICs) in bi-layered spring mass chains. A coupled array of such chains is then used to illustrate transversely bound waves propagating alon
Externí odkaz:
http://arxiv.org/abs/2206.11929
The introduction of structural defects in otherwise periodic media is well known to grant exceptional space control and localization of waves in various physical fields, including elasticity. Despite the variety of designs proposed so far, most of th
Externí odkaz:
http://arxiv.org/abs/2111.09021
We investigate a family of quasiperiodic continuous elastic beams, the topological properties of their vibrational spectra, and their relation to the existence of localized modes. We specifically consider beams featuring arrays of ground springs at l
Externí odkaz:
http://arxiv.org/abs/1906.00151
Publikováno v:
Phys. Rev. B 100, 024304 (2019)
Topological protection offers unprecedented opportunities for wave manipulation and energy transport in various fields of physics, including elasticity, acoustics, quantum mechanics and electromagnetism. Distinct classes of topological waves have bee
Externí odkaz:
http://arxiv.org/abs/1811.04814
Publikováno v:
Phys. Rev. Lett. 123, 034301 (2019)
We investigate the dispersion topology of elastic lattices characterized by spatial stiffness modulation. The modulation is defined by the sampling of a two-dimensional surface, which provides the lattices with topological properties that are usually
Externí odkaz:
http://arxiv.org/abs/1811.02637
This paper investigates the dynamic properties of one, two and three-dimensional tensegrity-based periodic structures introduced in Rimoli and Pal, Comp. B, 2017, which are here termed as tensegrity beams, plates and solids, respectively. We study th
Externí odkaz:
http://arxiv.org/abs/1805.01943
The paper investigates localized deformation patterns resulting from the onset of instabilities in lattice structures. The study is motivated by previous observations on discrete hexagonal lattices, where the onset of non-uniform, quasi-static deform
Externí odkaz:
http://arxiv.org/abs/1801.09835
Publikováno v:
Phys. Rev. B 96, 134307 (2017)
We report on the experimental observation of topologically protected edge waves in a two-dimensional elastic hexagonal lattice. The lattice is designed to feature K point Dirac cones that are well separated from the other numerous elastic wave modes
Externí odkaz:
http://arxiv.org/abs/1705.08247