Results 1 to 10 of about 1,983,636 (335)

Mechanical and thermal expansion properties of aligned carbon nanotube reinforced epoxy composites

open access: yesMechanical Engineering Journal, 2019
Aligned MWCNT/epoxy composites made with the three types of the multi-walled carbon nanotubes (MWCNTs) with different thermal annealing temperature have been prepared, and the tensile tests and thermal expansion tests of the composites in the MWCNT ...
Keiichi SHIRASU   +3 more
doaj   +1 more source

Analysis of the Bauschinger Effect in Cold Drawn Pearlitic Steels

open access: yesMetals, 2020
Prestressing steel wires usually undergo cyclic loading in service. Therefore, it is of interest to analyse certain features of their mechanical behaviour under this type of loading, such as the Bauschinger effect (BE) or the hardening rule, that fit the
Jesús Toribio   +6 more
doaj   +1 more source

Preparation and performance evaluation of electrothermal actuators using aligned carbon nanotube reinforced epoxy composites

open access: yesMechanical Engineering Journal, 2016
By using an aligned multi-walled carbon nanotube (MWCNT) reinforced epoxy composite, an electrothermal bimorph actuator was fabricated and its load and deformation capacities were investigated.
Keiichi SHIRASU   +6 more
doaj   +1 more source

Validation of orthopaedic surgeons’ assessment of cognitive function in patients with acute hip fracture

open access: yesBMC Musculoskeletal Disorders, 2019
Background About one fourth of patients with hip fracture have cognitive impairment. These patients are at higher risk of surgical and medical complications and are often excluded from participating in clinical research.
Målfrid Holen Kristoffersen   +7 more
doaj   +1 more source

The effect of aquatic exercise on bone mineral density in older adults. A systematic review and meta-analysis

open access: yesFrontiers in Physiology, 2023
Introduction: Aquatic or water-based exercise is a very popular type of exercise in particular for people with physical limitations, joint problems and fear of falling.
Eileen Schinzel   +26 more
doaj   +1 more source

Influence of the Straining Path during Cold Drawing on the Hydrogen Embrittlement of Prestressing Steel Wires

open access: yesMetals, 2023
Cold drawing is a commonly used technique for manufacturing the prestressing steel wires used as structural elements in prestressed concrete structures.
Jesús Toribio, Miguel Lorenzo
doaj   +1 more source

A novel n-type semiconducting biomaterial

open access: yesScientific Reports, 2022
There has been no research conducted thus far on the semiconducting behaviour of biomaterials. In this study, we present an n-type semiconducting biomaterial composed of amorphous kenaf cellulose fibre (AKCF) paper with a voltage-controlled N-type ...
Mikio Fukuhara   +6 more
doaj   +1 more source

Development of Highly Sensitive Strain Sensor Using Area-Arrayed Graphene Nanoribbons

open access: yesNanomaterials, 2021
In this study, a basic design of area-arrayed graphene nanoribbon (GNR) strain sensors was proposed to realize the next generation of strain sensors. To fabricate the area-arrayed GNRs, a top-down approach was employed, in which GNRs were cut out from a ...
Ken Suzuki   +3 more
doaj   +1 more source

Reverse Ballistic Impact Studies of Thin Plate Perforation

open access: yesEngineering Transactions, 2014
Full-scale ballistic experiments using tungsten rods and rolled homogeneous armour (RHA) steel plates are expensive to perform. For this reason, a study has been performed into the possibility of using less expensive, more easily available metals in ...
L. C. FORDE   +4 more
doaj   +1 more source

Impact and indenting damage of CVD-produced ZnS and ZnSe ceramics

open access: yesMaterials Research Express, 2020
Time series of acoustic emission pulses were excited in ductile ZnS and ZnSe ceramics either by a falling weight or by indenting the Vickers pyramid. Energy distributions in emitted acoustical emission pulses were found to be random (Poisson-like) in the
Alexandre Chmel   +3 more
doaj   +1 more source

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