Static Testing Regime

Represents one of the most common measurement regimes in which the deformation rate is set to a constant value, de/dt = const, and the force, F, necessary to keep the sample in equilibrium is measured with a dynamometer. If this force is measured in reference to the initial cross section of the 

FIGURE 5.13 Schematic illustration of static mechanical testing. 

The principal setup needed to carry out such measurements consists of three elements connected in series (1) the sample itself, (2) a mechanical device connected to one end of the sample (e.g., a motor) capable of moving the sample end at a preset rate, and (3) a rather stiff spring connected to the other side of the sample. 

In contrast to such measurements, popular studies on measuring long-range fiarces require precise measurements of both the forces and the distances (see Section 4.1), requiring sophisticated instrumentation. 

The applied forces and the resnlting stresses are, within certain limits, proportional to time, that is, dF/dz = const and do/dz = const. When one end of the sample is fixed, the load is applied to the other end, and the deformation is determined by the displacement of this other end. Another example of a still used device is a tensile tester with a heavy pendulum that is moved to the side at a constant rate and simultaneonsly serves as a lever transmitting the amplified load to the sample. This amplified load can be quite high, on the order of several tons. 

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Static Data information which is not related to individual samples or lots (e.g., test methods, specifications, calculations, field formats). This process should enable the collection, cleansing, verification, loading, and maintenance of the static data (e.g., specification limits, calculations, test regimes, etc.). Static data sets should be maintained in a configuration control system. 

Similar to the as-received testing regime, ultimate tensile strength, stiffness, and strain-to-feilure were determined quasi-statically in accordance with ASTM D 3039 for each class of material after saturation. A total of thirty samples were tested, ten of each material type. In addition, two samples of each material were set aside for crack density analysis using x-ray and optical microscopy techniques. 

Another instability mode of interest is due to the flow regime itself. For example, it is well known that the slug flow regime is periodic and that its occurrence in an adiabatic riser can drive a dynamic oscillation (Wallis and Hearsley, 1961). In a BWR system, one must guard against this type of instability in components such as steam separation standpipes. The design of the BWR steam separator complex is normally given a full-scale, out-of-core proof test to demonstrate that both static and dynamic performance are stable. 

Acute tests can be further divided with respect to flow regime typically either static or static-renewal. During the static procedure, test organisms are exposed to the environmental sample in relatively nontoxic and nonreactive cups, glass beakers, or aquaria... 

Economic activity rates were static and had fallen for older men. Many of those who lost jobs in the waves of restructuring that took place in manufacturing and other sectors moved on to sickness and disability benefits, contributing to what was described as hidden unemployment (Alcock et al. 2003). A number of push and pull factors were identified. Push factors included the collapse in demand for unskilled labour, the role of the activation regime and the relative laxity of medical and eligibility tests. Pull factors included the relative generosity of invalidity compared with unemployment benefits (Clasen et al. 2004). Other factors were also at work, especially an increase in qualifying mental health conditions. 

Static foam tests can even measure for specific shear rate regimes ... 

The sensor of glucose in man s blood was developed, made and tested for another application of fuel cells. The cathode was carbon activated organic complexs (ftalocyanine of Co and Fe), the anode was Pt, Pd. The electrolyte was solution of Krebbs-Ringer (pH=7,4). Such cell can work in static and flowing regime. The value of current at known load was determined by amount of fuel (glucose) at unlimited amount of oxidizer (air). 

Ejfect of flow regime experienced The speed with which a metal s surface comes to equilibrium with a water, and in some cases the characteristics of the corrosion product which is developed, can depend on the flow regime that it has experienced. At present, the standard sit-and-soak test defines static conditions. However, if this mechanism was thought potentially to be significant, different flow regimes could be incorporated into an ageing procedure to cover this. 

Exposure regime concentrations of the toxicant will vary according to whether the exposure is static, semi-static or flow-through in the test set-up. Temperature dependence sensitivity to chemicals may increase or decrease with changes in the temperature due to alterations in the catabolic status of the animals. 

Exposure regime concentrations of the toxicant will vary according to whether the exposure is static, semi-static or flow-through in the test setup. 

The results fiom the flexural creep data give a realistic prediction of the actual part stabihty in service. There is an increase in the creep compliance of the material with a decrease in the fiber volume fraction, an increase in temperature and stress, consistent with the tensile creep and static flexural tests. Creep compliances are shghtly higher perpendicular to flow direction. Results finm DMA and actual flexmal creep tests for reinforced nylon 6/6 are consistent in the linear viscoelastic regime. 

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