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Table 1 Experimental parameters and uncertainties obtained from stationary images

From: A Novel Image-based Ultrasonic Test to Map Material Mechanical Properties at High Strain-rates

Sample Material PMMA
  Dimensions (mm) 55 × 12 × 4
  Density (kg.m−3) 1160
(\(\dot {\varepsilon }\)=10−2) Young’s modulus (GPa) 2.9±0.1
  Poisson’s ratio 0.35±0.01
  T g (C) 110±5
Grid Thickness (μ m) < 100
  Grid pitch (mm) 1
  Sampling (pixel.period−1) 7
IR Model CEDIP Silver 480M
  Lens 27 mm
  Frame rate (fps) 50
  Integration time (μ s) 509
  Number of pixel (pixel2) 320 × 256
  Field of view (mm2) 60 × 48
  Uncertainty < 5C
UHS Model Shimadzu HPV-X
  Digitization 10 - bit
  Lens 28 - 105 mm Nikkor
  Frame rate (kfps) 500
  Number of pixel (pixel2) 400 × 250
  Max. sensor noise (% of grey levels) 3.5
  Field of view (mm2) 57 × 35
  Smoothing window (x,y,t) 7 × 7 × 7
  Displacement noise 0.6 μ m or 5 × 10−3 pix
  Strain noise (Finite diff. in μ def) ± 195
  Strain-rate noise (Finite diff. in s−1) ± 25
  Acceleration noise (Finite diff. in m.s−2) ± 1.3 × 104
  Stress noise (MPa) ± 0.15