Flexing Device

Flex Test for Barrier Materials. A mechanical flex test to replace the US Specification MIL-B-131B Performance Test of water vapor proof barrier material (July 1952), which is costly and time-consuming, was developed at Picatinny Arsenal. Three mechanical flexing devices, each having a basically different action, were evaluated as possible substitutes for the above spec test ... 

Modem methods and tools like Elemental Capture Spectroscopy Sonde ECS and EcoScope from Schlumberger and the Formation Lithology eXplorer (FLeX) device in combination with the interpretation system RockView from Baker Atlas determine certain elemental concentrations and calculate— based on a model assumption—mineral composition. Fundamental papers are written, for example, by Hertzog et al. (1987), Gilchrist et al. (1999, 2000), Barson et al. (2005), Pemper et al. (2006) and Han et al. (2009). 

The development of cardiac assist devices and other instrumentation and components which come in contact with the cardiovascular system requires materials which will perform in a physiological environment. One particularly difficult application is the diaphragm for blood pumps, which requires an elastomer to undergo cyclic deformation and/or flexing while in contact with blood. 

NW-TFT device performance does not change significantly upon slightly flexing the plastic substrate (Fig. 11.14d).67 The use of free-standing nanostructures for flexible electronics has also been demonstrated by various groups using nanotubes,68 nanowires,63 and nano- or micro-ribbons.69,70... 

Cladding for the reactor vessel is a continuous integral surface of corrosion-resistant material, having -inch (0.56 centimeter) nominal thickness, and a f-inch minimum thickness. The reactor vessel is supported by four vertical columns located under the vessel inlet nozzles. These columns are designed to flex in the direction of horizontal thermal expansion and thus allow unrestrained heat-up and cool-down. The columns also act as a hold-down device for the vessel. The supports are designed to accept normal loads and seismic and pipe rupture accident loads. 

In some textile production laboratories single reference standards or a simple set of hand standards with different hand values is used. This set of standards is produced from the same fabric as the one being evaluated by applying the same softener at incremental concentrations. If the softener is used in combination with other finishes, the concentration of the other fmishes must be held constant. Relatively simple methods to evaluate only the bending properties of fabric (flex rigidity) are the cantilever method and a similar device called Softometer, which are described in Chapter 4 on hand building. 

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