Soft magnetostrictive materials, having a combination of high soft magnetic properties and substantial magnetostriction, are highly sought for a wide range of applications. Nonetheless, a trade‐off relationship exist...
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316L stainless steel (SS316L) coatings were deposited on AZ80 magnesium alloy through HVOF thermal spraying to enhance its corrosion behavior. Coatings with low porosity (0.21±0.013%) and high microhardness (367&...
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A new strategy to chemically synthesize exchange-coupled SmCo_(5)/Sm_(2) Co_(17) nanocomposites by in situ decomposition of SmCox(5<x<8.5)is reported in this *** synthesis starts with the fabrication of Co/Sm_(2...
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A new strategy to chemically synthesize exchange-coupled SmCo_(5)/Sm_(2) Co_(17) nanocomposites by in situ decomposition of SmCox(5
mechanical linkages between epithelial cells are critical in regulating collective migration in tissue development and wound repair, but it is unclear how intercellular shear vs. tension forces differently regulate ce...
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Liquid crystal elastomers (LCEs) are a promising class of responsive materials for shape-morphable structures due to their large deformation, tunable properties, and low power consumption. It is well-known that by lam...
Liquid crystal elastomers (LCEs) are a promising class of responsive materials for shape-morphable structures due to their large deformation, tunable properties, and low power consumption. It is well-known that by laminating a contracting LCE with an inert but flexible material layer, bending actuation can be achieved. We report a method to fabricate thermoresponsive LCE and fabric bilayer actuators and characterize their utility as bending actuators. We find that the use of different strain-limiting fabrics yields varying actuation outputs and curvatures, which we discover to be reliant on the interfacial adhesion of the bilayer, rather than the stiffness of the strain-limiting layer. We demonstrate the efficacy of the proposed LCE-fabric bending actuator in a soft robotic gripper. The findings herein can be applied to the design of LCE and fabric bilayer structure patterns to realize complex and programmable out-of-plane morphing.
Hairpin winding technology, combined with direct oil jet impingement cooling, is a viable solution known to increase volumetric power density and efficiency in the next generation of traction motors. However, the cool...
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Hairpin winding technology, combined with direct oil jet impingement cooling, is a viable solution known to increase volumetric power density and efficiency in the next generation of traction motors. However, the coolant fluid interaction with the complex winding geometry has not yet been fully examined; specifically, with the use of high-fidelity CFD simulations. Thus, the present work investigates the radial and axial oil impinging jets in a hairpin winding motor using multi-phase simulation. The study first analyses power losses and temperature distribution of the motor under the Worldwide Harmonised Light Vehicle Test Procedure (WLTP). Next, the performance of axial and radial jet impingement is numerically analysed by considering the fluid flow. Finally, the two configurations are compared in terms of their oil film formation rate. The results indicate that the maximum power losses observed in typical driving conditions are considerably lower than the maximum losses predicted for the complete operational region of the motor. Moreover, the axial impinging jet shows a higher oil film formation rate compared to a radial jet impingement configuration within the examined conditions.
In this review,we propose a comprehensive overview of additive manufacturing(AM)technologies and design possibilities in manufacturing metamaterials for various applications in the biomedical field,of which many are i...
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In this review,we propose a comprehensive overview of additive manufacturing(AM)technologies and design possibilities in manufacturing metamaterials for various applications in the biomedical field,of which many are inspired by nature *** describes how new AM technologies(*** liquid interface production and multiphoton polymerization,etc)and recent developments in more mature AM technologies(*** bed fusion,stereolithography,and extrusion-based bioprinting(EBB),etc)lead to more precise,efficient,and personalized biomedical *** is a revolutionary topic creating intricate models with remarkable mechanical compatibility of metamaterials,for instance,stress elimination for tissue engineering and regenerative medicine,negative or zero Poisson’s *** exploiting the designs of porous structures(***,triply periodic minimal surface,plant/animal-inspired,and functionally graded lattices,etc),AM-made bioactive bone implants,artificial tissues,and organs are made for tissue *** material palette of the AM metamaterials has high diversity nowadays,ranging from alloys and metals(***-chromium alloys and titanium,etc)to polymers(*** polycaprolactone and polymethyl methacrylate,etc),which could be even integrated within bioactive *** advancements are driving the progress of the biomedical field,improving human health and quality of life.
Dislocation-mediated plasticity in inorganic semiconductors and oxides has attracted increasing research interest because of the promising mechanical and functional properties tuned by *** this study,we investigated t...
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Dislocation-mediated plasticity in inorganic semiconductors and oxides has attracted increasing research interest because of the promising mechanical and functional properties tuned by *** this study,we investigated the effects of light illumination on the dislocation-mediated plasticity in hexagonal wurtzite ZnO,a representative third-generation semiconductor material.A(0001)45o off sample was specially designed to preferentially activate the basal slip on(0001)*** types of nanoindentation tests were performed under four different light conditions(550 nm,334 nm,405 nm,and darkness),including low-load(60μN)pop-in tests,high-load(500μN)nanoindentation tests,and nanoindentation creep *** maximum shear stresses at pop-in were found to approximate the theoretical shear strength regardless of the light *** activation volume at pop-ins was calculated to be larger in light than in ***-sectional transmission electron microscope images taken from beneath the indentation imprints showed that all indentation-induced dislocations were located beneath the indentation imprint in a thin-plate shape along one basal slip *** indentation-induced dislocations could spread much deeper in darkness than in light,revealing the suppressive effect of light on dislocation *** analytical model was adopted to estimate the elastoplastic stress field beneath the *** was found that dislocation glide ceased at a higher stress level in light,indicating the increase in the Peierls barrier under light ***,nanoindentation creep tests showed the suppression of both indentation depth and creep rate by *** creep also yielded a larger activation volume in light than in darkness.
Dry sliding wear behavior of directed energy deposited (DED) 316L stainless steel and its TiB2-ceramic reinforced composite (CRC) is investigated using a pin-on-disc tribometer and compared it against wrought 316L all...
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In recent years, various experimental work on reinforced composites natural resources has been successfully carried out. This research focused on water absorption and bio composites from the treatment and untreated Pi...
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