Product Information
- Author
- Herausgeber FKM
- EAN
- 4250697512744
- Edition
- 1995
- Delivery time
- next business day
Lebendsdauerberechnung für gekerbte Bauteile mit Randschicht und Eigenspannung
139.10 EUR *
Gesamtpreis: 139.10 EUR *
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130.00 EUR excl. VAT
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Description
Lebendsdauerberechnung für gekerbte Bauteile mit Randschicht und Eigenspannung
FKM 1995 Project No. 145-3
Abstract:
In this research project, models based on the ör1lichen concept for an engineering crack life calculation of surface strengthened components are described. The influence of different material properties in the surface layer and in the core, macro residual stresses and surface fineness is determined. In the experimental part of the research project, fatigue strength tests were carried out on unnotched and notched axially loaded specimens for three combinations of surface layer hardening processes and base material - shot peening and nitriding of the quenched and tempered steel 42 CrMo 4 and nitrocarburizing of the unalloyed steel Ck 15. Strain-controlled single-stage tests on untreated specimens, hardness and residual stress measurements and FE analyses were used to determine the input data for the calculation models. For the investigated combinations of base material and surface layer hardening process, the local concept allows an engineering estimate of the crack component service life in the range of high and low failure cycles with good accuracy. The change of the failure sensor1 and the course of the Wöhler and fatigue life lines for surface and core cracking are illustrated. Wöhler curves for surface hardened components are already a calculation result in the concept presented here. The tool presented here makes it possible to evaluate different variants of edge-strengthened components in terms of their fatigue strength as early as the design phase.
Scope of report:
66 pages, 49 figures, 11 tables, 33 references
Appendix:
57 pages, 41 figures, 21 tables
Start of work:
01.07.1990
End of work:
31.12.1993
Funding body:
Stiftung Stahlanwendungsforschung, A 46 Research unit: Department of Mechanics of Materials, Technische Hochschule Darmstadt
Director:
Prof. Dr.-lng. T. Seeger
Editor and author:
Dipl.-lng. T. Bruder
Chairman of the working group:
Dr.-lng. A. Bäumel Mercedes-Benz AG, Sindelfingen
Chairman of the advisory board:
Prof. Dr.-lng. H. Kipphan, Heidelberger Druckmaschinen AG, Heidelberg
Abstract:
In this research project, models based on the ör1lichen concept for an engineering crack life calculation of surface strengthened components are described. The influence of different material properties in the surface layer and in the core, macro residual stresses and surface fineness is determined. In the experimental part of the research project, fatigue strength tests were carried out on unnotched and notched axially loaded specimens for three combinations of surface layer hardening processes and base material - shot peening and nitriding of the quenched and tempered steel 42 CrMo 4 and nitrocarburizing of the unalloyed steel Ck 15. Strain-controlled single-stage tests on untreated specimens, hardness and residual stress measurements and FE analyses were used to determine the input data for the calculation models. For the investigated combinations of base material and surface layer hardening process, the local concept allows an engineering estimate of the crack component service life in the range of high and low failure cycles with good accuracy. The change of the failure sensor1 and the course of the Wöhler and fatigue life lines for surface and core cracking are illustrated. Wöhler curves for surface hardened components are already a calculation result in the concept presented here. The tool presented here makes it possible to evaluate different variants of edge-strengthened components in terms of their fatigue strength as early as the design phase.
Scope of report:
66 pages, 49 figures, 11 tables, 33 references
Appendix:
57 pages, 41 figures, 21 tables
Start of work:
01.07.1990
End of work:
31.12.1993
Funding body:
Stiftung Stahlanwendungsforschung, A 46 Research unit: Department of Mechanics of Materials, Technische Hochschule Darmstadt
Director:
Prof. Dr.-lng. T. Seeger
Editor and author:
Dipl.-lng. T. Bruder
Chairman of the working group:
Dr.-lng. A. Bäumel Mercedes-Benz AG, Sindelfingen
Chairman of the advisory board:
Prof. Dr.-lng. H. Kipphan, Heidelberger Druckmaschinen AG, Heidelberg
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