As the core component of flexible nozzle on solid rocket motors, joint relies shear deformation its silicone rubber elastomers to achieve a large vector angle, and is prone fatigue failure when working under high pressure. Aiming resolve elastomers, cracking energy density (CED) method was introduced into analysis joints. A convenient integral formula for calculating CED derived from Ogden seco...

PURPOSE Breast cancer is a major public health issue for women, and early detection significantly increases survival rate. Currently, there is increased research interest in elastographic soft-tissue imaging techniques based on the correlation between pathology and mechanical stiffness. Anthropomorphic breast phantoms are critical for ex vivo validation of emerging elastographic technologies. T...

A body powered hand prosthesis has been developed with a view to meeting some of the more c o m m o n criticisms made against currently available designs i.e. weight and cosmetic appearance. A n overall weight reduction of about 30 per cent has been achieved and the use of silicone rubber as the cosmetic glove material has resulted in greatly improved cosmesis and stain resistance. The prosthes...

The aim of this study was to determine the influence of the finishing protocol (FP) on flexural properties of several composites (CR). Twenty composite samples (25x2x2 mm) were prepared: G1 HelimolarR; G2 Filtek™ Z350;G3TetricR N Ceram, G4 Point 4™, G5 Premisa™; G6 Esthet.XR HD, G7 ice, G8 Vit-L-escenceR, G9 GrandioR, G10 TPHR3, G11 AmelogenR Plus, G12 Brilliant Enamel; G13 Filtek™ Z100 and ran...

In recent years, many tactile sensors have been developed with the advancement in robotics. For example, there are sensors that measure the distribution of the contact state or the force distribution. Among the several tactile sensors in use currently, none can evaluate the sense of gentle touch. We have developed a fibratus tactile sensor that uses the property of reflection. Using this sensor...

A planar ultramicroelectrode nitric oxide (NO) sensor was fabricated to measure the local NO surface concentrations from NO-releasing microarrays of varying geometries. The sensor consisted of platinized Pt (25 microm) working electrode and a silver paint reference electrode coated with a thin silicone rubber gas permeable membrane. An internal hydrogel layer separated the Pt working electrode ...

A PROCEDURE which would allow the lengthening of an extra-ocular muscle beyond that which is usually obtained from the conventional surgical techniques would be of definite advantage in large-angle strabismus and strabismus fixus. Since silicone rubber is well tolerated by ocular and non-ocular tissues, the implantation of a small, thin sheet of this material to lengthen an extra-ocular muscle ...

The aim of this study was to determine the effect of immersion disinfection procedures on the dimensional stability of two elastomeric impression materials. Impressions of a stainless steel die were made with polyether (PE) and with addition-polymerized silicone rubber (PVS). The test specimens underwent disinfection treatment by immersion in two commercially available solutions containing quat...

A new fail-safe, variable stiffness, and variable damping isolator (VSDI) device is designed, developed and tested utilizing magneto-rheological elastomers (MREs). This system provides a simultaneous controllable stiffness and damping. The performance of the VSDI is investigated experimentally under dynamic shear loads. The results demonstrate that this VSDI is capable of increase of stiffness ...

Traction forces produced by moving fibroblasts have been observed as distortions in flexible substrata including wrinkling of thin, silicone rubber films. Traction forces generated by fibroblast lamellae were thought to represent the forces required to move the cell forwards. However, traction forces could not be detected with faster moving cell types such as leukocytes and growth cones (Harris...