Results 121 to 130 of about 39,376 (341)

Comparison of Different Temperatures on Bending Properties of Six Niti Endodontic File Systems [PDF]

open access: yes, 2018
Introduction: Manufacturers claim that modern NiTi files with proprietary heat treatment transform at higher temperatures, thus staying more martensite and being more resistant to cyclic fatigue and more flexible.
Yoo, Sukbum
core   +1 more source

Experimental methodology of study of damage initiation and development in textile composites in uniaxial tensile test [PDF]

open access: yes, 2008
Damage in textile composites is closely connected with the internal micro- and meso-geometry of the reinforcement, and reveals features, which are not present in the damage processes in classical laminates. This paper proposes a test sequence intended to
Baudry, F.   +6 more
core   +2 more sources

Microscale Mapping of Fiber Strain and Damage in Composite Wrinkled Laminates Using Computed Tomography Assisted Wide‐Angle X‐Ray Scattering

open access: yesAdvanced Science, EarlyView.
This study combines full‐field tomography with diffraction mapping to quantify radial (ε002$\varepsilon _{002}$) and axial (ε100$\varepsilon _{100}$) lattice strain in wrinkled carbon‐fiber specimens for the first time. Radial microstrain gradients (−14.5 µεMPa$\varepsilon \mathrm{MPa}$−1) are found to signal damage‐prone zones ahead of failure, which ...
Hoang Minh Luong   +7 more
wiley   +1 more source

Ultrasonic fatigue of superelastic Nitinol and in situ synchrotron observation of strain and damage

open access: yesJournal of Materials Research and Technology
Superelastic Nitinol was tested at ultrasonic frequency in the high and very high cycle fatigue regime. Thin sheet specimens were initially preloaded to mimic crimping and deployment of Nitinol implants, which lead to a sample in a multi-phase state with
M. Fitzka   +7 more
doaj   +1 more source

Fatigue testing and properties of hardmetals in the gigacycle range [PDF]

open access: yes, 2017
Hardmetal products are frequently fatigue loaded in service, such as e.g. cutting tools for milling or percussion drills. In the present work, the fatigue behaviour of hardmetals was investigated into the gigacycle range using ultrasonic resonance ...
Danninger, Herbert   +5 more
core   +2 more sources

An Implanted Tooth That Can Feel

open access: yesAdvanced Science, EarlyView.
To endow the implanted tooth with masticatory perception, herein we demonstrate that a 3D‐printed piezoelectric‐core/robust‐sheath implanted tooth can rebuild the sensing feedback, serving as “mechanoreceptors” in converting the mechanical chewing force to electrical signals, and up to brain through surrounding alveolar nerve system.
Yaru Cao   +13 more
wiley   +1 more source

Fatigue life time modelling of Cu and Au fine wires

open access: yesMATEC Web of Conferences, 2018
In this study, the influence of microstructure on the cyclic behaviour and lifetime of Cu and Au wires with diameters of 25μm in the low and high cycle fatigue regimes was investigated.
Khatibi Golta   +4 more
doaj   +1 more source

Nondestructive characterization of the elastic properties of orthotropic composites with ultrasound [PDF]

open access: yes, 2011
Due to the increasing use of composite materials in critical applications demanding light weight to high strength ratio, reliable evaluation tools are necessary.
Degrieck, Joris   +5 more
core  

An ultrasonic approach for contact stress mapping in machine joints and concentrated contacts [PDF]

open access: yes, 2004
The measurement of pressure at a contact in a machine part is important because contact stresses frequently lead to failure by seizure, wear or fatigue.
Drinkwater, B.W.   +3 more
core   +1 more source

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