Back Propagation Neural Network-Based Predictive Model for Magnetorheological–Chemical Polishing of Silicon Carbide

Micromachines, Год журнала: 2025, Номер 16(3), С. 271 - 271

Опубликована: Фев. 27, 2025

Magnetorheological–chemical-polishing tests are carried out on single-crystal silicon carbide (SiC) to study the influence of process parameters polishing effect, predict results via a back propagation (BP) neural network, and construct model processing material removal rate (MRR) surface quality. Magnetorheological–chemical employs mechanical coupled with chemical action, synergistic effect both actions can achieve an improved effect. The show that increasing abrasive particle size, hydrogen peroxide concentration, workpiece rotational speed, disc MRR first increases then decreases. With concentration carbonyl iron powder continues increase. machining gap, shows continuous decrease, corresponding changes in roughness tend decrease prediction models quality constructed BP their average absolute percentage errors less than 2%, which is important for online monitoring optimisation.

Язык: Английский

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Amplifying Magneto-Mechanical Performance of Magnetorheological Elastomers through Surface Functionalization of Iron Nanoparticles

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Март 2, 2025

Challenges posed by the chemical incompatibility between nanoparticles and polymer matrices hinder widespread use of nanocomposites as material platform for many innovations. In this study, we demonstrate effectiveness a versatile approach to surface functionalization commercial nanoparticles. To illustrate importance proper functionalization, process was used functionalize high-moment iron enhance magneto-mechanical performance nanoparticle-based magnetorheological elastomers (MREs). We successfully grafted off-the-shelf with poly(dimethylsiloxane) (PDMS) ligands, then them fabricate anisotropic MREs reduced stiffness improved magnetic properties compared fabricated original nonfunctionalized particles. Structural analysis revealed regular arrangement agglomeration within elastomeric matrix when functionalized particles were used. Mechanical testing showed enhanced deflection bending these MREs. Furthermore, improvement obtained at lower effective content particle elastomers. Magnetic characterization, in turn, amplified anisotropy chain ordering inside functionalized-particle Our findings highlight potential improve nanocomposites, such superior mechanical properties.

Язык: Английский

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Recycled Ferromagnetic Fillers Endow Excellent Magnetic Field Tunable Viscosity and Electromagnetic Radiation Shielding within Elastomer Composites

Advanced Engineering Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 14, 2025

We report the integration of an unconventional filler ferrosilicon nitride (FSN), within two elastomers, to develop composites having concurrent magnetic field‐tunable viscosity and electromagnetic radiation shielding capabilities. FSN is a refractory ceramic which possesses soft ferromagnetic nature low electrical conductivity at room temperature. Moreover, porous microstructure light weight enables disperse uniformly making it attractive magnetically active filler, domain that remains unexplored. Recycled FSN, possessing irregular morphology was integrated varying parts per hundred rubber hydrogenated nitrile butadiene (HNBR), liquid silicone (SR), different values stiffness. displays good dispersion HNBR matrix leading improved mechanical properties; however, minor agglomeration occurs softer SR. The fillers align well with external field sweep 0 ↔ 1 T, effectively altering by 42% in 59.3% Furthermore, demonstrate excellent across X Ku bands. primary mode absorption through resonance particles, subdued reflection component. Thus, recycled can be capitalized where functionality should complement sustainability 3R targets.

Язык: Английский

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A bead random generation method revealing structure-function relation of magnetorheological fluids with arbitrary morphology particles

Physics of Fluids, Год журнала: 2025, Номер 37(4)

Опубликована: Апрель 1, 2025

The structure-function relation is crucial for guiding the preparation of magnetic intelligent materials with arbitrary particle morphologies. However, from experimental perspective, it both challenging and inefficient to elucidate this relationship, given scale randomness preparation. Here, we propose a multiscale computational method through superellipsoid morphology constraint equation bead random generation method, ensuring force-magnet coupling simulation morphologies an error only 2.24 %. mechanical behaviors, including magnetic-induced stress, dynamic response, anti-settlement, are systematically calculated comprehensively analyzed. derived dimensionless numbers exhibit strong correlation interactions, thereby revealing between behaviors This work develops accurate efficient investigating provides deep insights into morphology-induced demonstrating significant potential accelerate customized material design next-generation materials.

Язык: Английский

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Active control of wave propagation direction of elastic metamaterial

European Journal of Mechanics - A/Solids, Год журнала: 2025, Номер unknown, С. 105685 - 105685

Опубликована: Апрель 1, 2025

Язык: Английский

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Stretchable rubber composites with lower hysteresis losses, improved magnetic effect, and a robust magnetic sensitivity

Sensors and Actuators A Physical, Год журнала: 2024, Номер 373, С. 115425 - 115425

Опубликована: Май 3, 2024

Язык: Английский

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Self-sensing magnetic actuator based on sustainable collagen hybrid nanocomposites

International Journal of Biological Macromolecules, Год журнала: 2024, Номер 277, С. 134364 - 134364

Опубликована: Июль 31, 2024

Taking into account that natural polymers are renewable and biodegradable, hybrid materials based on required for advanced technological applications with reduced environmental footprint. In this work, sustainable composites have been developed collagen as a polymeric matrix different magnetic fillers, in order to tailor response. The were prepared by solution casting 30 wt% of magnetite nanoparticles (Fe

Язык: Английский

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Tunable rebound of millimeter-sized rigid balls by magnetic actuation of elastomer-based surface microstructures

Smart Materials and Structures, Год журнала: 2024, Номер 33(6), С. 067001 - 067001

Опубликована: Май 3, 2024

Abstract A novel method for controlling the rebound behavior of small balls made Al 2 O 3 with a radius 2.381 mm is presented. It uses different types micro-structured surfaces soft magnetoactive elastomers. These were fabricated via laser micromachining and include fully ablated as well micrometer-sized lamellas fixed width 90 µ m, height 250 m three gap sizes (15, 60 105 m). The can change their orientation from edge-on to face-on configuration according direction external magnetic field permanent magnet. significantly influences balls, coefficient restitution e ≈ 0.5 < 0.1. highest relative in between zero 80 % observed m. Other characteristics ball such penetration depth into an Magnetoactive elastomer maximum deceleration are investigated well. proposed does not require constant power supply due use magnets. may find applications impact engineering.

Язык: Английский

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Magnetic elastomer composites with tunable magnetization behaviors for flexible magnetic transducers

Polymer Composites, Год журнала: 2024, Номер unknown

Опубликована: Сен. 18, 2024

Abstract Magnetic elastomer composites are extending the field of soft robotics by integrating flexibility elastomers with versatile performance magnetic materials. In this work, a series (BaCo x Ti Fe 12–2 O 19 /PDMS) tunable response have been successfully synthesized. composite, component consists Co‐Ti co‐doped barium hexaferrite , BCTF) nano powders, and matrix is made polydimethylsiloxane (PDMS). The coercivity ( H c ) BCTF can be reduced from 3950 Oe to 70 Oe, which bestow on different behavior. These obtained blending low Young's modulus, approximately 1.5 MPa. Furthermore, when applying same external field, BaCo 1.2 9.6 /PDMS deformation Angle as high 60°. exhibit magnetic‐induced owing adjustable permeability nanoparticles. This research significantly advances design applications specific characteristics, such sensors transducers, thus opening new horizons for innovation in related fields. Highlights All composite modulus behaviors. provides solution transducers.

Язык: Английский

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A novel magnetorheological-polyethylene glycol shear thickening gel based on enhanced gel matrix

Applied Surface Science, Год журнала: 2024, Номер 679, С. 161292 - 161292

Опубликована: Сен. 20, 2024

Язык: Английский

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