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  • AN0009 AEC-Q200 Stress Test Qualification
    component-level qualification testing. The Component Technical Committee established AEC-Q200 "Stress Test Qualification for Passive Components" to define the minimum stress test driven qualification requirements for passive electrical devices including ceramic capacitors. This application note provides
  • Stress Rupture Tests
    in strain is recorded over time. Short and medium term creep and stress relaxation testing can be performed on static or dynamic systems. However, some long term creep tests utilize a special test frame designed specifically for that purpose.
  • Can Ergonomic Stress Be Measured Using Thermography?
    and arteries. The more the blood flow the greater the emitted energy. Thermal imagers can measure this increased energy. This paper will discuss tests performed on two sites of the body prone to ergonomic stress. One test was to measure the effect of subjects sitting in the recommended ergonomic position
  • Hopkinson Bar Testing: Testing Materials for Reactions to Stress Pulses
    This customer is involved in testing materials for how they react to stress pulses. The idea is to introduce a stress pulse into the Material Under Test (MUT) and monitor it as it travels through the material. This method of material characterization is also known as "Hopkinson Bar" testing.
  • Elevated Temperature Stress Rupture Response of Sintered Alpha Silicon Carbide (.pdf)
    Knoop-indented as well as machined 4-point flexure stress-rupture experiments were conducted with sintered alpha silicon carbide at 1200?C, 1400?C, and 1500?C in are. The stress-rupture curve exhibited a knee within 100 hours of the test for controlled flaw specimens, the knee stress level being
  • Highly Accelerated Life Testing (HALT) and Highly Accelerated Stress Screening (HASS)
    Highly accelerated life testing (HALT) and highly accelerated stress screening (HASS) are accelerated testing processes. The results from HALT testing are used to set test limits for production screening or HASS tests. The operating and/or destruct limits derived from HALT testing allow the use
    parameters. Despite these empirical approaches, however, there is widespread ambiguity regarding the appropriate way to test for environmental stress-crack resistance (ESCR). There is also a need to clarify the fundamental molecular mechanism underlying this type of polymer failure. The problem
  • A Proposed Method for Finding Stress and Allowable Pressure in Cylinders with Radial Nozzles
    A simple technique is presented for calculating the local primary stress from internal pressure in nozzle openings. Nozzle internal projections, reinforcing pads and fillet welds are considered for nozzles on cylinders. The technique uses beam on elastic foundation theory and extends the work
  • Measurement of Continuous Surface Shear Stress Vector Distributions (.pdf)
    difference used to drive this flow was controlled by two pressure regulators in series, and its value was indicated by a calibrated gauge. It can be shown that the pressure difference (total - static) used to drive the jet is proportional to the shear stress.
  • Shear Strength and Torsion Tests
    Shear strength is defined as the maximum stress that a material can withstand before failure in shear. In a planar shear test, opposing forces are applied parallel to the cross-sectional area under test. Torsion tests also provide an indication of shear properties. Torsion test evaluate materials

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