SINT Technology: Hole-drilling-method – non-destructive mechanical method for residual stress analysis

08.05.2024

The hole-drilling method is a semi-destructive mechanical method to measure residual stresses using strain gage rosettes and it has been standardized at world level by the ASTM E837-20 “Standard Test Method for Determining Residual Stresses by the Hole-Drilling Strain-Gage Method”.
The hole-drilling method is the most effective approach to evaluate residual stress thanks to the following features:

  • High precision
  • Low damage
  • Field use
  • Stress profile along the depth
  • Quick stress profile

The MTS3000-Restan by SINT Technology is an automatic system to perform the ASTM E837-20 procedure by hole-drilling. With this method, a small hole is drilled in a stressed specimen, thus producing strain relaxations in the material surrounding the hole. These relaxed strains are acquired from the rosette and then used to calculate the magnitude and the direction of the residual stresses using the calibration coefficients supplied by the standard.
The ASTM E837-20 specifies the following parameters that are typically used in a hole-drilling test:

  • The limit of applicability
  • Analysis depth
  • Calculation algorithms
  • Drilling increments
  • Numerical coefficients
  • The data processing method

For the hole-drilling technique, SINT Technology is an ISO/IEC 17025 accredited test lab according to the ASTM E837 standard. The company also produces the MTS3000, fully automatic machine for measuring residual stresses by hole-drilling. More information:

SINT Technology

Residual stress analysis in mechanical components
With state-of-the-art measurement technology

SINT Technology, a member of TÜV AUSTRIA Group, uses state-of-the-art measurement technology to test the residual stress level in mechanical components.

(f.l.t.r.): Antonio Ferraro (COO TÜV AUSTRIA ITALIA), Alessio Benincasa (SINT Technology), Luca Santucci (SINT Technology), Luca De Marchi (UNIBO), Camilla Bahia Larocca (UNIBO), Denis Bogomolov (UNIBO), Alessandro Marzani (UNIBO), Antonio Palermo (UNIBO), Federica Zonzini (UNIBO), Crescenzo Di Fratta (CEO TÜV AUSTRIA ITALIA), Mohammad Abdullah Siddiqui (UNIBO), Gerald Lackner (TÜV AUSTRIA), Armin Proyer (TÜV AUSTRIA), Sina Zolfagharysaravi (UNIBO), Mikhail Prokofyev (TÜV AUSTRIA) und Enrico Boccini (TÜV AUSTRIA)

Research and development cooperation

TÜV AUSTRIA and University of Bologna
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TÜV AUSTRIA is expanding its research and development cooperation with the University of Bologna by supporting three PhD projects.

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Acquisition

TÜV AUSTRIA acquires NTI-Italia S.r.l.
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The company has established itself successfully on the Italian market, especially in the field of periodic inspection of work equipment.

Italian QCB Quality Certification Bureau joins TÜV AUSTRIA Group: Former QCB owners Renato Rossi and Nicoletta Menegon (l, r) with TÜV AUSTRIA Italia general manager Crescenzo Di Fratta (center) (C) TÜV AUSTRIA Group

Expansion in Italy

Italian QCB Quality Certification Bureau joins TÜV AUSTRIA Group
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Accredited and internationally established Italian certification company adds key environmental and security certification competencies to leading testing, inspection and certification organisation.

(f.l.t.r.): Antonio Ferraro (COO TÜV AUSTRIA ITALIA), Alessio Benincasa (SINT Technology), Luca Santucci (SINT Technology), Luca De Marchi (UNIBO), Camilla Bahia Larocca (UNIBO), Denis Bogomolov (UNIBO), Alessandro Marzani (UNIBO), Antonio Palermo (UNIBO), Federica Zonzini (UNIBO), Crescenzo Di Fratta (CEO TÜV AUSTRIA ITALIA), Mohammad Abdullah Siddiqui (UNIBO), Gerald Lackner (TÜV AUSTRIA), Armin Proyer (TÜV AUSTRIA), Sina Zolfagharysaravi (UNIBO), Mikhail Prokofyev (TÜV AUSTRIA) und Enrico Boccini (TÜV AUSTRIA)
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Gianni Esposito_Crescenzo die Fratta_c_TÜV AUSTRIA
TÜV AUSTRIA acquires CFF
Italian QCB Quality Certification Bureau joins TÜV AUSTRIA Group: Former QCB owners Renato Rossi and Nicoletta Menegon (l, r) with TÜV AUSTRIA Italia general manager Crescenzo Di Fratta (center) (C) TÜV AUSTRIA Group

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