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2. International Space Conference ICPMSE-12, Biarritz, France, 1-5 October, 2018


Stress Engineering

PreStress Engineering Division (PreStressED)

Ultrasonic Measurement of Applied and Residual Stresses

Ultrasonic Computerized Complex (UCC) - UltraMARS

Device UltraMARS
Laptop (Optional Item)
Measurement Unit
with Transducers
  • Measurement of the velocities of the longitudinal ultrasonic wave and shear waves of orthogonal polarization to determine the uni- and biaxial stresses averaged through thickness of material
  • Measurement of the velocities of surface waves to determine the uni- and biaxial stresses on the surface of material
Supporting Software

  • Control of the measurement process
  • Storing of the acoustice measurement data
  • Calculation & drawing of residual stress distribution
  • Usage of the designed method & equipment with standard PC's
Expert System
for Residual Stress Analysis

Advanced database on residual stresses UltraMARS and software ReStr for analysis of the influence of measured residual stresses on the service life of parts and welded components

The following parameters of welded elements with the goal to enhance the fatigue performance are analyzed:

  • Material selection
  • Preferred design of welded elements
  • Weld processes
  • welding residual stresses
  • application of improvement treatments
  • influence of possible repair technologies
  • realistic service conditions
Equipment UltraMARS for Ultrasonic Measurement of Applied and Residual Stress

Main Technical Parameters of the Measurement Unit

The developed equipment allows one to determine the magnitudes and signs of uni- and biaxial residual and applied stresses for a wide range of materials as well as stress, strain and force in bolts (pins). Quartz plates measuring from 3x3 mm to 10x10 mm in cross-section are used as ultrasonic transducers. These gauges are attached to the object of investigation by special clamping straps and/or electromagnets

The main technical characteristics of the measurement unit
  • stress can be measured in materials with thickness 2 - 150 mm
  • error of stress determination (from external load) 5 - 10 MPa
  • error of residual stress determination 10%
  • stress, strain & force measurement in bolts (pins) 25-1000 mm long
  • power requirement 220 V/50Hz or 115v/60Hz (as requested)
  • independent power supply (accumulator battery 12 V - optional)
  • overall dimensions of measurement device 300x200x150 mm
  • weight of unit with transducers 6 kg

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