Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Magnetorheological elastomers (2)
- Applications (1)
- BET (1)
- Breakdown (1)
- Carbon black (1)
-
- Coating (1)
- Core-shell (1)
- DSC (1)
- Damping property (1)
- Device (1)
- EDX (1)
- Elastomer (1)
- Equi-biaxial fatigue (1)
- FESEM (1)
- FTIR (1)
- Frequency (1)
- IR (1)
- Industrially viable solution-based processing route (1)
- Interfacial slipping (1)
- Mechanical performances (1)
- Micro engineering (1)
- Micro manufacturing (1)
- Micro moulding (1)
- Microstructure (1)
- Microstructures (1)
- Morphology (1)
- Nano (1)
- Nanoparticles (1)
- Narrow grain size distribution (1)
- Numerical (1)
- Publication
Articles 1 - 7 of 7
Full-Text Articles in Engineering
Equi-Biaxial Fatigue Of Elastomers: The Effect Of Oil Swelling On Fatigue Life, Stephen Jerrams, John Hanley, Niall Murphy, Ali Hassan
Equi-Biaxial Fatigue Of Elastomers: The Effect Of Oil Swelling On Fatigue Life, Stephen Jerrams, John Hanley, Niall Murphy, Ali Hassan
Articles
The effect of oil swelling on the fatigue life of ethylene propylene diene monomer rubber (EPDM) has been studied under conditions of equi-biaxial cycling using dynamic bubble inflation. Specimens were subjected to varying degrees of swelling in reference mineral oils and fatigued at constant engineering stress amplitudes. The reference oils used for swelling the EPDM had known aniline points, allowing the rubber-oil compatibility to be determined. The inflation fluid for fatigue testing was selected with a solubility parameter that would produce a desired level of incompatibility with the test specimens, thereby limiting the amount of additional swelling during cycling. Wöhler …
Big Challenges In Designing Small Parts For Mass Production, Kevin Delaney, David Kennedy
Big Challenges In Designing Small Parts For Mass Production, Kevin Delaney, David Kennedy
Conference Papers
Micro manufacturing involves the production of parts or products with features on a micro scale. The technology is used to produce parts for several business sectors which have experienced dramatic growth in recent years and forecasts are that this growth will continue in the years ahead. With the loss of traditional manufacturing jobs to lower-cost locations many companies in Ireland see micro manufacturing as having significant potential to preserve and increase revenue. A move into micro manufacturing will present significant opportunities for those companies willing to take the risk of producing parts with micro dimensions. Such a transition is a …
The Effect Of Vibratory Milling On The Powder Properties Of Zinc Oxide Varistors, Maura Kelleher, M.S.J. Hashmi
The Effect Of Vibratory Milling On The Powder Properties Of Zinc Oxide Varistors, Maura Kelleher, M.S.J. Hashmi
Articles
The formation of powders from multi-elemental oxides for the subsequent formation of a green and sintered compact body is a major processing operation in the manufacture of ZnO varistors. The physical and chemical properties of the metal oxides are crucial not only for the formation of a varistor component with optimum microstructure and thus electrical characteristics but also for avoiding the introduction of flaws and reduced yield during subsequent manufacturing stages. The effect of vibratory milling using cylindrical zirconia media on the physical and chemical properties of the mixed multi-elemental oxide additives of a commercial ZnO varistor formulation was studied. …
Effect Of Carbon Black On The Mechanical Performances Of Magnetorheological Elastomers, Lin Chen
Effect Of Carbon Black On The Mechanical Performances Of Magnetorheological Elastomers, Lin Chen
Articles
Several magnetorheological elastomer (MRE) samples, with different weight percentages of carbon black, were fabricated under a constant magnetic field. Their microstructures were observed by using an environmental scanning electron microscope (SEM), and their mechanical performance including magnetorheological (MR) effect, damping ratio and tensile strength were measured with a dynamic mechanical analyzer (DMA) system and an electronic tensile machine. The experimental results demonstrate that carbon black plays a significant role in improving the mechanical performance of MR elastomers. Besides the merits of high MR effect and good tensile strength, the damping ratio of such materials is much reduced. This is expected …
High Performance Zno Varistors Prepared From Nanocrystalline Precursors For Miniaturised Electronic Devices, Suresh Pillai, Declan Mccormack, John Kelly, Raghavendra Ramesh
High Performance Zno Varistors Prepared From Nanocrystalline Precursors For Miniaturised Electronic Devices, Suresh Pillai, Declan Mccormack, John Kelly, Raghavendra Ramesh
Articles
An industrially viable solution-based processing route using minimal amounts of solvent has been used to prepare bulk quantity nanopowders (average particle size 15.3 nm) for the fabrication of ZnO varistors. The xerogels, calcined powders and sintered materials were fully characterised. The preparation of varistors from nanopowders has been optimised by studying the effect of temperature on grain growth, densification and breakdown voltage. The varistors are prepared by sintering at 1050 C for 2 hours, a temperature that is significantly lower than that used in the current industrial process. Highly dense varistor discs prepared from the sintered material produce devices, with …
Design Issues For Therapeutic Ultrasound Angioplasty Waveguides, Declan Noone, Graham Gavin, Garrett Mcguinness
Design Issues For Therapeutic Ultrasound Angioplasty Waveguides, Declan Noone, Graham Gavin, Garrett Mcguinness
Conference Papers
Therapeutic ultrasound angioplasty is a new minimally invasive cardiovascular procedure for disrupting atherosclerotic lesions. Mechanical energy is transmitted in the form of ultrasound waves via long, flexible wire waveguides navigated to the lesion site through the vascular system. The underpinning principle of this technology is that plaque may be disrupted through a combination of direct contact ablation, pressure waves, cavitation and acoustic streaming, which all depend on the amplitude and frequency of displacements at the distal tip of the wire waveguide. This study identifies a number of key design issues for clinical devices of this type, and describes testing procedures …
Damping Of Magnetorheological Elastomers, Lin Chen
Damping Of Magnetorheological Elastomers, Lin Chen
Articles
The damping property of magnetorheological (MR) elastomers is characterized by a modified dynamic mechanical-magnetic coupled analyzer. The influences of the external magnetic flux density, damping of the matrix, content of iron particles, dynamic strain and driving frequency on the damping properties of MR elastomers were investigated experimentally. The experimental results indicate that the damping properties of MR elastomers greatly depend on the interfacial slipping between the inner particles and the matrix. Different from general composite materials, the interfacial slipping in MR elastomers is affected by the external applied magnetic field.