Results 21 to 30 of about 175,988 (236)

Multi-objective shape optimization of large strain 3D helical structures for mechanical metamaterials

open access: yesMaterials & Design, 2022
The need for mechanical metamaterials with large strain range and lightweight properties are evidenced to engineering applications. In this regard, novel helical structures are proposed as suitable unit cell’s components of mechanical metamaterials ...
Guglielmo Cimolai   +2 more
doaj   +1 more source

Post-buckling behaviour of slender structures with a bi-linear bending moment-curvature relationship [PDF]

open access: yes, 2007
Certain classes of slender structures of complex cross-section or fabricated from specialised materials can exhibit a bi-linear bending moment–curvature relationship that has a strong influence on their global structural behaviour.
Vaz, M. A.   +3 more
core   +1 more source

Intraductal Tissue Sampling Device Designed for the Biliary Tract

open access: yesIEEE Journal of Translational Engineering in Health and Medicine, 2021
Clinical sampling of tissue that is read by a pathologist is currently the gold standard for making a disease diagnosis, but the few minimally invasive techniques available for small duct biopsies have low sensitivity, increasing the likelihood of false ...
Malay S. Patel   +3 more
doaj   +1 more source

FEATURES OF CALCULATION OF UNEVEN SWELLING SCREW PILES OF OIL AND GAS PIPELINES IN FROZEN GROUND

open access: yesВестник СибАДИ, 2017
The article is devoted to the problem of buckling of helical piles and deformation of the superstructure of oil and gas pipelines under the action of forces of frost heaving of soils.
V. N. Kuznetsova, M. V. Oryol
doaj   +1 more source

Helical buckling in columnar assemblies of soft discotic mesogens [PDF]

open access: yesPhysical Review E, 2015
We investigate the emergence of chiral meso-structures in one-dimensional fluids consisting of stacked discotic particles and demonstrate that helical undulations are generated spontaneously from internal elastic stresses. The stability of these helical conformations arises from an interplay between long-ranged soft repulsions and nanopore confinement ...
Morales-Anda, L., Wensink, H. H.
openaire   +3 more sources

Flexural–torsional buckling of thin-walled composite box beams [PDF]

open access: yes, 2007
Buckling of an axially loaded thin-walled laminated composite is studied. A general analytical model applicable to the flexural, torsional and flexural–torsional buckling of a thin-walled composite box beam subjected to axial load is developed.
Lee, Jaehong, Vo, Thuc
core   +1 more source

The Effect of General Imperfections on the Buckling of Cylindrical SheIls. [PDF]

open access: yes, 1968
An experimental and theoretical investigation of the effect of general imperfections on the buckling load of a circular cylindrical shell under axial compression was carried out.
Arbocz, Johann
core   +1 more source

Approximation of the critical buckling factor for composite panels [PDF]

open access: yes, 2012
This article is concerned with the approximation of the critical buckling factor for thin composite plates. A new method to improve the approximation of this critical factor is applied based on its behavior with respect to lamination parameters and ...
Bettebghor, Dimitri, Bartoli, Nathalie
core   +1 more source

Erosion Factor Analysis of Coiled Tubing with Helical Buckling

open access: yesShiyou jixie, 2023
During coiled tubing(CT)operations,a wide annulus between CT and casing may lead to helical buckling and serious erosion of the CT inner wall.The inner wall erosion of CT with helical buckling was investigated through physical experiment and numerical ...
Cao Yinping   +4 more
doaj  

Bio-inspired, helically oriented tubular structures with tunable deformability and energy absorption performance under compression

open access: yesMaterials & Design, 2022
This study designs a series of helically oriented tubular structures inspired by Bouligand-type natural materials to optimize their mechanical performance.
Cheng-Che Tung   +3 more
doaj   +1 more source

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