Results 41 to 50 of about 9,704 (210)

The Hidden Dangers of Counterfeit and Replica-Like Endodontic Files: A Scoping Review of Current Evidence. [PDF]

open access: yesAust Dent J
ABSTRACT This scoping review mapped and critically appraised laboratory evidence on counterfeit and replica‐like nickel–titanium endodontic files, evaluating design, metallurgical composition, surface finishing, and mechanical performance to clarify clinical and regulatory implications.
Immich F   +5 more
europepmc   +2 more sources

Statistical mechanics of triangulated ribbons

open access: yes, 2002
We use computer simulations and scaling arguments to investigate statistical and structural properties of a semiflexible ribbon composed of isosceles triangles.
A.C. Maggs   +35 more
core   +1 more source

Strength analysis of helical buckling tubing using spring theory [PDF]

open access: yesAIP Conference Proceedings, 2017
With the constraint of the wellbore, tubing has possibility to conduct spiral plastic deformation if axial compression load is great enough. The residual stress from the plastic deformation of tubing will eventually influence the effective stress, thus strength safety.
Yinping Cao, Hui Xia, Yihua Dou
openaire   +1 more source

MAGTWIST: A Magnetically‐Driven Rotary Actuator Using a Traveling‐Wave With Integrated Stiffness Tunability

open access: yesAdvanced Functional Materials, EarlyView.
MAGTWIST: A compact magnetic rotary actuator, enabling smooth, stepless rotation, and on‐demand locking. Inspired by peristalsis, a soft polymer belt generates a traveling‐wave, enabling 270° rotation when heated. Cooling stiffens the belt, locking it in position and enabling it to withstand high loads.
Simon Frieler   +3 more
wiley   +1 more source

A Finite Element Analysis of Lateral Buckling of Tensile Armor Layers of Flexible Pipes Considering Machining Geometry Defects

open access: yesJournal of Marine Science and Engineering
The tensile armor layer plays a crucial role in offshore flexible pipelines, primarily bearing axial tensile loads. However, during installation and operation, it may experience compressive forces, leading to a risk of lateral buckling, which is further ...
Yongyu Li   +5 more
doaj   +1 more source

A benchmark data set for the mechanical properties of double-stranded DNA and RNA under torsional constraint

open access: yesData in Brief, 2020
Nucleic acids are central to the storage and transmission of genetic information and play essential roles in many cellular processes. Quantitative understanding and modeling of their functions and properties requires quantitative experimental ...
Willem Vanderlinden   +4 more
doaj   +1 more source

The Cuttlebone Blueprint for Multifunctional Metamaterials: Design Taxonomy, Functional Decoupling, and Future Horizons

open access: yesAdvanced Functional Materials, EarlyView.
Cuttlebone‐inspired metamaterials exploit a septum‐wall architecture to achieve excellent mechanical and functional properties. This review classifies existing designs into direct biomimetic, honeycomb‐type, and strut‐type architectures, summarizes governing design principles, and presents a decoupled design framework for interpreting multiphysical ...
Xinwei Li, Zhendong Li
wiley   +1 more source

Auxetic metamaterials and structures

open access: yesCailiao gongcheng, 2021
Auxetic metamaterials and structures have excellent mechanical properties such as shear resistance, impact resistance, fracture resistance, energy absorption and vibration isolation, permeability variability, synclastic curvature in bending, etc. Auxetic
GAO Yu-kui
doaj   +1 more source

Adaptive locomotion of artificial microswimmers

open access: yes, 2019
Bacteria can exploit mechanics to display remarkable plasticity in response to locally changing physical and chemical conditions. Compliant structures play a striking role in their taxis behavior, specifically for navigation inside complex and structured
Chao, Qianwen   +6 more
core   +1 more source

Emergence of Escherichia coli critically buckled motile helices under stress [PDF]

open access: yesProceedings of the National Academy of Sciences, 2018
Significance We have discovered an emergent mechanism by which Escherichia coli can escape high-stress regions, such as near-lethal concentrations of antibiotics, by forming long motile helical filaments that are poized at the critical shear buckling point: 2 π
Trung V. Phan   +6 more
openaire   +2 more sources

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