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Hardness Measurement: Invisible to the Human Eye
for hardness and materials parameters. All of these values can be obtained in one automated measurement by evaluating hardness vs. load, hardness vs. indentation depth and indentation depth vs. load curves. The method also provides information regarding creep and elastic recovery properties of the specimen...
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Zeta Potential Measurement (Aqueous and Non-Aqueous, Iso-Electric Point Determinations)
can apply either a stress or a strain, making viscoelastic measurements such as creep/recovery and stress relaxation possible on one, integrated instrument. A wide range of measuring geometries enables samples from as low a viscosity as water, to high modulus solids to be measured on one instrument...
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A Method of Determining the Elastic Properties of Alloys in Selected Crystallographic Directions For X-Ray Diffraction Residual Stress Measurement (.pdf)
gage bond. Room temperature curing contact. data for these alloys can lead to errors as high as. epoxies were found to be less stable, and appeared to. 80%. creep under sustained load. It is the purpose of this paper to describe a technique. The two active gages on the sample beam were wired...
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Choosing The Right Force Sensor for Aerospace Testing
measurements taken at time1 are the same. taken at time2, the difference in real time can be months or years in a fuselage test. Accuracy over. time is a key parameter in the test design. While there are several methods and procedures, the "creep measurement of the force sensor. system at 20 minutes under...
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Accurately measuring ultraslow motion
measurements, while plastics have high creep and allow a bit more leeway. With optical gauges, both ends of the materials creep spectrum are now easy to measure. This type of technology allows a longer range of measurement, from 12 up to 100 mm on some gauges, thereby reducing the variety of gauges...
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Joint Relaxation in Fastened Joints
is a particular problem on joints where gasket, or parts such as spring washers, are present. On these joints it can take a long time before the joint settles and results in a reduction in clamping until the condition has stabilized. The physical phenomenon for the collapse of material is called "creep." All...
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Caliper Basics
into account by subtracting. range, parallelism errors can creep into. George Schuetz is director of precision gages. them from the caliper reading. the measurement. Thus, it is important. for Mahr Federal Inc. (Providence, RI). For more. Similarly, other specialized anvil. to check parallelism...
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Melt Flow Rheology Testing for Polyolefins
by using an Arrhenius fit of zero shear viscosity ? 0 verses temperature. Nornally used with the Ellis Flow Model and TTS modeling of master curves of polyolefins. Zero shear viscosity - ?0 can be used for several models, calculations, and with dynamic, stress relaxation, creep compliance, and relaxation...
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Case Story Nokian Tyres- Calibrating for ensuring high and consistent product quality
- often it is necessary to creep, crawl or stretch. to reach the equipment that needs to be calibrated. This. requires that the calibration devices be durable, easy to. use, and precise. untitled Beamex Case Story. Nokian Tyres. Finland. Calibrating for ensuring high and. consistent product...
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FEA builds better bridges
higher-order FEA software is necessary." Such software, for example, incorporates responses of steel and concrete to the weight of the bridge, as well as to wind, water, traffic, corrosion, temperature, and even time. (Concrete and steel creep, resulting in long-term deformation). Of course the software also...