The dynamic modulus and the loss factor of magnetorheological elastomers (MREs) various compositions anisotropies are studied by torsion oscillations performed in absence presence an external magnetic field. emphasis is on Payne effect, i.e. dependence elastomer characteristics strain amplitude their evolution with cyclically increasing decreasing amplitudes. MREs based two silicone matrices differing storage (soft, G′ ∼ 103 Pa, hard, 104 matrices). For each matrix, concentration carbonyl...

ABSTRACT Highly compliant elastomers with a shear storage modulus as low 25 Pa are prepared using commercially available silicone, plasticizer, and tactile mutator silicone additive. They used matrix material for magneto‐active (MAEs) carbonyl iron contents between 0 85 wt %. In the absence of an external magnetic field, MAEs based on two selected mixtures ranges ∼100 ∼2000 Pa. Addition to mixture results in long post‐cure period depending curing temperature initial mixture. presence...

Soft robotic grippers (SRGs) have been extensively employed in grasping and manipulation applications due to the fact that they are beneficial for pick-and-place of difficult-to-handle delicate objects with various geometries stiffness a comfortable safer way. This article presents bio-inspired shape-adaptive SRG augmented electroadhesion (EA) functionality, FinEA, by cost-effective combination Fin Ray structured two-fingered two soft-stretchable EA pads. The pads were manufactured screen...

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Astrictive robot grippers are one of the most common methods prehension used in automation, which include vacuum suc tion, magnetoadhesion and electroadhesion. The important parameters when considering implementation any grip per, including astrictive devices, retention pressure, energy efficiency, response time. actual gripping techniques evaluated qualitatively quantitatively this article not new. What is new comparative theoretical analysis its applicability to evaluation times relative...

Mechanical cues such as extracellular matrix stiffness and movement have a major impact on cell differentiation function. To replicate these biological features in vitro, soft substrata with tunable elasticity the possibility for controlled surface translocation are desirable. Here we report use of ultra-soft (Young’s modulus <100 kPa) PDMS-based magnetoactive elastomers (MAE) suitable culture substrata. Soft non-viscous PDMS (<18 is produced using modified extended crosslinker. MAEs...

The measurement of temperature change as an indication a material's relative thermal conductivity has often been utilized means tactile sensing. Unfortunately, the long time response most sensors makes such technique too slow for normal industrial robotic uses. authors consider human performance with particular regard to sensing and introduce by which usable risetime may be achieved. Two methods, using devices hitherto not sensing, are demonstrated.< <ETX...

In addition to force and torque reflection, teleoperation also requires a degree of tactile feedback. This is particularly important where knowledge surface topology desired, such as might be encountered by an underwater or space exploration vehicle. Similarly, the aerospace industry presently developing ever increasingly sophisticated virtual reality environments for pilot training. It felt that, in visual, audio, feedback, some form feedback would useful. paper presents means which...

Despite the greatly superior performance in terms of hardness modulus change, use electrorheological fluids under compressive stress has been largely neglected favour implementations relying on shear-stress effects alone. This paper shows how fluids, addition to Bingham plasticity, also exhibit what appears be rheopectic behaviour when subjected stress.

This article demonstrates a range of robot gripping techniques suitable for use with carbon and glass frber sheets. Many the grippers discussed were originally designed textile fabrics similar sheet materials, their suitability handling fiber sheets, together some commonly used filler is considered. Criteria are outlined selecting correct technique desired task, taking into account many different types material structure available.

Describes the benefits of using electroadhesion when handling very delicate, polished and/or coated optical and electro‐optical microcomponents. Electroadhesion is a technique already familiar to those working in semiconductor industry eminently suitable for microcomponents air, gas or vacuum.

With the growing need of automation for garment assembly in clothing industry comes requirement a compete range textile handling devices. Robotics offers flexibility needed to market where change style and fashion can be both rapid unpredictable. The actual physical mechanisms involved use electrostatic attraction fabrics as robot gripping technique are discussed. Following an outline underlying principles, experimental results presented materials tested using electroadhesive surfaces. A...

Rather than concentrating on a specific section of sensor technology, this book attempts (and to some extent succeeds) in providing what can only be described as an in-depth overview the whole field intelligent sensing. Virtually all mathematical analysis normally associated with subject area is discarded favour practical implementation approach. Explicit diagrams and, many cases, photographs actual element structures are included together schematics relevant signal processing circuits. A...

SUMMARY This paper illustrates means by which the techniques of compliance and electroadhesion can, using electror-heological, other fluids, be combined to provide very effective shape adaptive robot end-effectors similar holding surface.

Magnetoactive elastomers (MAE) based on soft silicone matrices, filled with various proportions of large diameter (approximately 50 μm) iron and small 0.5 magnetite particles are synthesized. Their rheological behavior in homogeneous magnetic fields up to 600 mT is studied detail. The addition facilitates fabrication uniformly distributed elastomer composites by preventing aggregation sedimentation during curing. It shown that using the proposed bimodal filler it possible tailor...

Abstract A low‐cost wax‐cast molding technique for structuring ultrasoft (Young's modulus ≤ 40 kPa), agglutinative magnetorheological elastomer (MRE) material is presented. MRE structures ranging from a few millimeters down to the micrometer range with highly reproducible results are possible. Semitransparent MREs also fabricated and their surfaces modified accordingly. This method opens new possibilities in biomedical engineering microfluidic applications. © 2012 Wiley Periodicals, Inc. J....

The destacking and assembly of textile fabric garment components is a process found throughout the clothing industry. paper considers in particular example shirt collar assembly, which three panels have to be separated from their respective stacks, inspected for flaws then placed one on top other before being fed into fusing press makes bond between them. There split ply. It explained why handling by contact, air jet separation vacuum pick-up are inappropriate. how robotic grippers using...

In the field of medical diagnosis, there is a strong need to determine mechanical properties biological tissue, which are histological and pathological relevance. Malignant tumors significantly stiffer than surrounding healthy tissue. One established diagnosis procedures palpation body organs Palpation used measure swelling, detect bone fracture, find pulse, or locate changes in state tissue organs. Current practice routinely uses sophisticated diagnostic tests through magnetic resonance...