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  • Dynamic Mechanical Analysis (DMA)
    Dynamic mechanical analysis (DMA) is an analytical technique which measures the modulus (stiffness) and damping (energy dissipation) properties of materials as those materials are deformed under periodic (oscillatory) stress. Several components are are critical to the design and performance
  • Dynamic Mechanical Analysis of Hydrogel
    contract research laboratory specializing in polymers, contacted Bose (R) with the challenge of accurately determining the dynamic stiffness and modulus of a polyvinyl alcohol hydrogel. The ElectroForce (R) 3100 test instrument and DMA (Dynamic Mechanical Analysis) Software, in conjunction
  • Automotive Fatigue Life and Dynamic Mechanical Analysis of a Matrix Polymer
    Bose with the need to assess fatigue response and also to perform a DMA assessment on their raw materials. The ElectroForce (R) 3330 test instrument with DMA (Dynamic Mechanical Analysis) software, in conjunction with WinTest (R) control software, was used to conduct these tests. The ElectroForce 3330
  • Dynamic Mechanical Analysis (.doc)
    The DMA determines changes in sample properties resulting from changes in five experimental variables: temperature, time, frequency, force, and strain. The deformation can be applied sinusoidally, in a constant, or under a fixed rate. The DMA uses samples that can be in bulk solid, film, fiber, gel,
  • Fundamentals of Dynamic Signal Analysis
    This note is a primer for those who are unfamiliar with the advantages of analysis in the frequency and modal domains and with the class of digitizers and analyzers designed for Dynamic Signal Analysis. The traditional way of observing signals is to view them in the time domain. The time domain
  • Dynamic Testing Characterizes the Viscoelastic Properties of Vocal Fold Tissue
    of up to 15 Hz(1). Dynamic Mechanical Analysis data in the frequency range of typical human speech (150-300 Hz) would be useful to fully evaluate the mechanical properties of original or replacement tissue. In addition, Stress Relaxation and Strain Creep data help determine the range of mechanical
  • High Dynamic Range - Fact or Fiction?
    . The effect of the additional gain is to add a static range of 60dB on top of the theoretical dynamic range of 144dB of the 24bit ADC. Figure 2: Normalised Spectrum Analysis of 2V and 20mV digitised 1 KHz sinewaves. Static Range Control. The choice of optimal range setting can be partially addressed
  • An Integrated Approach to the Dynamic Simulation of Landing Gear Systems
    be met. Aircraft companies have used increasingly more complete analyses after starting a few years ago with simulation of a runway (random) profile, a discrete (tuned bump or 1.7g static) and a combined load condition based on a formula. The runway profile and tuned bump analyses involved dynamic

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