A5009538257- Acoustic Wave Phenomena Research
- Polymer composites and self-healing
- Noise Effects and Management
- Hearing Loss and Rehabilitation
- Elasticity and Material Modeling
- Hydrogels: synthesis, properties, applications
- Tribology and Lubrication Engineering
- Music Technology and Sound Studies
- Dielectric materials and actuators
- Ultrasonics and Acoustic Wave Propagation
- Cellular and Composite Structures
- Aerodynamics and Acoustics in Jet Flows
- High voltage insulation and dielectric phenomena
- Advanced Fiber Optic Sensors
- Periodontal Regeneration and Treatments
- Epoxy Resin Curing Processes
- Structural Load-Bearing Analysis
- Engineering Applied Research
- Structural Behavior of Reinforced Concrete
- Blood properties and coagulation
- Innovative concrete reinforcement materials
- Polymer Nanocomposites and Properties
University of Bristol
2022-2025
National Composites Centre
2023-2025
University of Pisa
2007
Rigid polyurethane foams (RPUFs) are among the most used polymeric materials due to their tailorable properties. Greener and biobased polyol sources for synthesising RPUFs have been recently prototyped because of ever-growing demand more sustainable solutions. Castor Oil has also rapidly become one successful alternatives replace fossil-based components. This study extensively investigates three types developed from commercially available Oil-based resins, correlating properties across...
<title>Abstract</title> We have developed hydrogel systems with tunable porosity through dialysis casting by varying alginate and poloxamer compositions from 0% to 10%. These gels feature diverse topologies, yielding loss factors between 16% 29% in the 50 Hz 300 frequency range. The dynamic modulus shows a remarkable increase of over an order magnitude, reaching approximately 3 MPa compared static modulus. Vibration transmissibility tests mechanical analysis reveal that poroelastic...
We have developed hydrogel systems with tunable porosity through dialysis casting by varying alginate and poloxamer compositions from 0% to 10%. These gels feature diverse topologies, yielding loss factors between 16% 29% in the 50 Hz 300 frequency range. The dynamic modulus shows a remarkable increase of over an order magnitude, reaching approximately 3 MPa compared static modulus. Vibration transmissibility tests mechanical analysis reveal that poroelastic pneumatic-like effects porous...
The review focuses on architected acoustic metamaterials to manipulate airborne sound waves, with only limited discussions elastic related solid media. We the design of and physical mechanisms underpinning their performance manufacturing methodologies, while also examining potential issues challenges affecting use in acoustics. complexities several metamaterial architectures are discussed. A new classification system is proposed distinguish configurations based typology channels inside...
<title>Abstract</title> Metamaterials and metastructures are traditionally made using fossil-based components. We describe here an eco-friendly sustainable alternative to build with load-bearing characteristics by a novel modular trussed cell concept from natural composite rods derived the giant bamboo (<italic>Dendrocalamus asper</italic>) bi-phasic plant-based polymeric joints soybean (<italic>Glycine max</italic>) castor oil (<italic>Ricinus communis</italic>). The metastructure cells...
Abstract Acoustic metamaterials are increasingly being considered as a viable technology for sound insulation. Fractal patterns constitute potentially groundbreaking architecture acoustic metamaterials. We describe in this work the behaviour of transmission loss Hilbert fractal used control purposes. The 3D printed with related to configurations from zeroth fourth order is investigated here using impedance tube tests and Finite Element models. evaluate, particular, impact equivalent porosity...
We describe here a class of acoustic metamaterials with fractal Hilbert space-filling and coiled geometry equal tortuosity for noise mitigation. Experiments are performed using four-microphone impedance tube benchmarked against non-viscous viscothermal finite element models related to configurations spanning up five fractal/geometry orders. show that the absorption can be predicted by resonance cavities associated tortuous paths. For given order, at specific frequencies is also enhanced...
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Granular hydrogels, composed of densely packed microgels, are an emerging class injectable microporous scaffolds that provide interstitial porosity for endogenous cell recruitment and tissue repair. However, weak bonding interactions between constituent microgels compromises the mechanical integrity these biomaterials, limiting their scope effectiveness in vivo application where structural support is required. To address this challenge, we introduce a new bioinspired stabilization method...
Experiments and numerical methods were used to investigate the key parameters which affect transmission loss behaviour of Hilbert fractal acoustic metamaterials. The tests conducted using a four-microphone impedance tube, simulation was performed COMSOL Multiphysics software. Fractal order cavity slot widths on metamaterials investigated. 3D printing manufacturing techniques make polylactic acid specimens. model developed utilised thermo-viscous lossless domains with boundary layer mesh in...
Acoustic metamaterials are increasingly being considered as a viable technology for sound insulation. Fractal patterns constitute potentially groundbreaking architecture acoustic metamaterials. We describe in this work the behaviour of transmission loss Hilbert fractal used control purposes. The 3D printed with related to configurations from zeroth fourth order is investigated here using impedance tube tests and Finite Element models. evaluate, particular, impact equivalent porosity relative...