Product Information
- Author
- Herausgeber FKM
- EAN
- 4250697512928
- Edition
- 1995
- Delivery time
- next business day
Bewertung von zerstörungsfrei aufgefundenen Fehlern in Schweißverbindungen mit Hilfe der Bruchmechan
139.10 EUR *
Gesamtpreis: 139.10 EUR *
Prices incl. VAT
130.00 EUR excl. VAT
available
Description
Bewertung von zerstörungsfrei aufgefundenen Fehlern in Schweißverbindungen mit Hilfe der Bruchmechan
FKM 1995 Issue No. 211 Project No. 115
Abstract:
The occurrence of defects in welded joints cannot always be avoided. Typical types of defects are gas voids, slag inclusions, bonding and root defects as well as penetration notches or cracks. Depending on their type, size and frequency, such defects can have an unfavorable effect on the load-bearing capacity and service life of a component. In order to record this influence during design and evaluation, the seam quality has so far only been characterized qualitatively on the basis of non-destructive testing methods, e.g. radiographic testing, by assigning it to an evaluation group. The application of fracture mechanical defect evaluation concepts to welded joints enables the quantification of the relationship between load, material resistance and defect size. In the research project, experimental and computational investigations were carried out to describe the fracture mechanical behavior of non-destructively detected internal defects in welded joints on flat plates, pipes and a component. The focus here was on the following questions: 0 Accuracy of the non-destructive determination of defect sizes 0 Prediction of defect behavior with the aid of fracture mechanics 0 Comparison of the prediction with the actual behavior of the defects 0 Verification of the transferability of the results determined on model specimens to components. The non-destructive testing of the defective welded joints showed the limits of quantitative flaw size determination for the ultrasonic testing methods used, depending on the test conditions selected. By assessing the predictive accuracy of the defect behavior on components with the aid of characteristic values determined on samples, gaps were closed and obstacles in the application of fracture mechanics were removed. The fracture mechanics evaluation of the internal defects delivered satisfactory results. For the first time, a quantitative assessment of defects in welded joints from non-destructive defect detection, detectability, size determination and evaluation was tested on components.
Scope of report:
200 p., 131 fig., 7 tab, 37 lit.
Start of work:
30.11.1988
End of work:
30.06.1993
Funding body:
BMWi / AIF-Nr. 7686
Research unit:
Fraunhofer Institute for Mechanics of Materials Wöhlerstraße 11,79108 Freiburg
Head:
Prof Dr. rer. nato E. Sommer
Processors and authors:
Dr.-lng. W. Burget Dr.-lng. J.G. Blaue! Dr.-lng. D. Memhard Dipl.-Phys. W. Müller, IztP Saarbrücken Partial consultant SAFT measurements J. Schüler B. Urich
Chairwoman of the working group:
Dr. Christina Berger Siemens AG -UB KWU, Mülheim a. d. Ruhr
Chairman of the advisory board:
Prof. Dr.-lng. H. Kipphan Heidelberger Druckmaschinen AG, Heidelberg
Abstract:
The occurrence of defects in welded joints cannot always be avoided. Typical types of defects are gas voids, slag inclusions, bonding and root defects as well as penetration notches or cracks. Depending on their type, size and frequency, such defects can have an unfavorable effect on the load-bearing capacity and service life of a component. In order to record this influence during design and evaluation, the seam quality has so far only been characterized qualitatively on the basis of non-destructive testing methods, e.g. radiographic testing, by assigning it to an evaluation group. The application of fracture mechanical defect evaluation concepts to welded joints enables the quantification of the relationship between load, material resistance and defect size. In the research project, experimental and computational investigations were carried out to describe the fracture mechanical behavior of non-destructively detected internal defects in welded joints on flat plates, pipes and a component. The focus here was on the following questions: 0 Accuracy of the non-destructive determination of defect sizes 0 Prediction of defect behavior with the aid of fracture mechanics 0 Comparison of the prediction with the actual behavior of the defects 0 Verification of the transferability of the results determined on model specimens to components. The non-destructive testing of the defective welded joints showed the limits of quantitative flaw size determination for the ultrasonic testing methods used, depending on the test conditions selected. By assessing the predictive accuracy of the defect behavior on components with the aid of characteristic values determined on samples, gaps were closed and obstacles in the application of fracture mechanics were removed. The fracture mechanics evaluation of the internal defects delivered satisfactory results. For the first time, a quantitative assessment of defects in welded joints from non-destructive defect detection, detectability, size determination and evaluation was tested on components.
Scope of report:
200 p., 131 fig., 7 tab, 37 lit.
Start of work:
30.11.1988
End of work:
30.06.1993
Funding body:
BMWi / AIF-Nr. 7686
Research unit:
Fraunhofer Institute for Mechanics of Materials Wöhlerstraße 11,79108 Freiburg
Head:
Prof Dr. rer. nato E. Sommer
Processors and authors:
Dr.-lng. W. Burget Dr.-lng. J.G. Blaue! Dr.-lng. D. Memhard Dipl.-Phys. W. Müller, IztP Saarbrücken Partial consultant SAFT measurements J. Schüler B. Urich
Chairwoman of the working group:
Dr. Christina Berger Siemens AG -UB KWU, Mülheim a. d. Ruhr
Chairman of the advisory board:
Prof. Dr.-lng. H. Kipphan Heidelberger Druckmaschinen AG, Heidelberg
Product link copied to the clipboard.
