Uncertainty of strain release coefficients for the blind-hole procedure evaluated by Monte Carlo simulation
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Bin Qiang
Abstract
The blind-hole method is widely applied in measuring the residual stress of metal component surfaces. In this paper, the Monte Carlo method is used to analyze the uncertainty of strain release coefficients which are influenced by the unreasonable assumptions made in the process of residual stress measurement. Based on a theoretical formula, MATLAB programs were designed to evaluate the error dispersion of the strain release coefficients for the blind-hole method. Compared with the values calibrated by test, it is shown that the uncertainty of the strain release coefficients can be evaluated reasonably by the use of the Monte Carlo method. In addition, the values predicted by the Monte Carlo method are more meaningful and suited to practical application.
Kurzfassung
Das Bohrlochverfahren wird breitflächig angewendet, um die Eigenspannungen auf den Oberflächen metallischer Komponenten zu messen. In den dem vorliegenden Beitrag zugrundeliegenden Forschungsarbeiten wird das Monte-Carlo-Verfahren angewendet, um die Unsicherheit von Spannungsabbaukoeffizienten zu analysieren, die durch unvernünftige Annahmen während der Messung von Eigenspannungen beeinflusst werden. Basierend auf den theoretischen Formeln wurden Programme mit der MATLAB-Routine geschrieben, um den Fehler in der Verteilung der Spannungsabbaukoeffizienten für das Bohrlochverfahren zu evaluieren. Im Vergleich mit den in Versuchen kalibrierten Werten zeigte sich, dass die Unsicherheit der Spannungsabbaukoeffizienten unter Anwendung des Monte-Carlo-Verfahrens angemessen evaluiert werden kann. Darüber hinaus sind die mittels des Monte-Carlo-Verfahrens vorhergesagten Koeffizienten plausibler und für die praktische Anwendung geeignet.
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© 2017, Carl Hanser Verlag, München
Articles in the same Issue
- Inhalt/Contents
- Contents
- Fachbeiträge/Technical Contributions
- Micro-CT defect analysis and hardness distribution of flat-face extruded EN AW6060 aluminum chips
- Confirmation of tensile residual stress reduction in electron beam welding using low transformation temperature materials (LTT) as localized metallurgical injections – Part 2: Residual stress measurement
- Distribution functions for the linear region of the S-N curve
- Uncertainty of strain release coefficients for the blind-hole procedure evaluated by Monte Carlo simulation
- Influence of welding conditions on crack opening displacements in welded CT specimens
- Microstructure characterization and corrosion testing of MAG pulsed duplex stainless steel welds
- Conventional sintering behavior of matrix materials used for diamond beads
- Acoustic emission by steel fiber reinforced concrete under tensile damage
- Investigations on multi-run metal made of HSLA steel – Heterogeneous microstructure and mechanical properties
- Design of utility tools and their application for testing mechanical properties of metallic materials
- Improvement of the sacrificial behavior of zinc in scratches of zinc-rich polymer coatings by incorporating clay nanosheets
- Influence of geometric design variables on the efficiency of the high energy horizontal chromite type ball milling process
- ANN evaluation of bearing strength on pin loaded composite plates in different environmental conditions
- Tribomechanical behavior of TiCN/TiAlN/WC-C multilayer film on cutting tool inserts for machining
- Preparation and mechanical properties of nano-quartz fiber filled PMMA composites
Articles in the same Issue
- Inhalt/Contents
- Contents
- Fachbeiträge/Technical Contributions
- Micro-CT defect analysis and hardness distribution of flat-face extruded EN AW6060 aluminum chips
- Confirmation of tensile residual stress reduction in electron beam welding using low transformation temperature materials (LTT) as localized metallurgical injections – Part 2: Residual stress measurement
- Distribution functions for the linear region of the S-N curve
- Uncertainty of strain release coefficients for the blind-hole procedure evaluated by Monte Carlo simulation
- Influence of welding conditions on crack opening displacements in welded CT specimens
- Microstructure characterization and corrosion testing of MAG pulsed duplex stainless steel welds
- Conventional sintering behavior of matrix materials used for diamond beads
- Acoustic emission by steel fiber reinforced concrete under tensile damage
- Investigations on multi-run metal made of HSLA steel – Heterogeneous microstructure and mechanical properties
- Design of utility tools and their application for testing mechanical properties of metallic materials
- Improvement of the sacrificial behavior of zinc in scratches of zinc-rich polymer coatings by incorporating clay nanosheets
- Influence of geometric design variables on the efficiency of the high energy horizontal chromite type ball milling process
- ANN evaluation of bearing strength on pin loaded composite plates in different environmental conditions
- Tribomechanical behavior of TiCN/TiAlN/WC-C multilayer film on cutting tool inserts for machining
- Preparation and mechanical properties of nano-quartz fiber filled PMMA composites
