The contrast of simplicity and accuracy in modeling multiaxial notch fatigue
The fatigue assessment of notches under multiaxial and non-proportional service loading is challenging. Simple models (e.g. local strain approach based on normal stress and strain) are of poor quality for this general case of stress states and ductile material behavior. Advanced approaches show high...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2019-01-01
|
| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2019/49/matecconf_icmff1218_13003.pdf |
| _version_ | 1818956275369639936 |
|---|---|
| author | Riess Christian Obermayr Martin Vormwald Michael |
| author_facet | Riess Christian Obermayr Martin Vormwald Michael |
| author_sort | Riess Christian |
| collection | DOAJ |
| description | The fatigue assessment of notches under multiaxial and non-proportional service loading is challenging. Simple models (e.g. local strain approach based on normal stress and strain) are of poor quality for this general case of stress states and ductile material behavior. Advanced approaches show high accuracy, but require additional material testing and calibration. From an engineering point of view, deviations are tolerable to a certain extent. This contribution introduces two approaches for modeling multiaxial notch fatigue which are easy to apply. The first approach is an extension of the classical local strain approach. The second approach implements a simplified multiaxial notch approximation which enables the use of the extended short crack model in practical applications.
A large database with experiments on notched components under multiaxial stresses is set up and used to validate the proposed algorithms. Results show the effectiveness of both approaches for ductile steels. Both approaches can be useful for engineers who are faced to multiaxial fatigue of notched components. |
| first_indexed | 2024-12-20T10:51:22Z |
| format | Article |
| id | doaj.art-1e5fa7c8672e4102a05f25c703f61b71 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-20T10:51:22Z |
| publishDate | 2019-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-1e5fa7c8672e4102a05f25c703f61b712022-12-21T19:43:14ZengEDP SciencesMATEC Web of Conferences2261-236X2019-01-013001300310.1051/matecconf/201930013003matecconf_icmff1218_13003The contrast of simplicity and accuracy in modeling multiaxial notch fatigueRiess Christian0Obermayr Martin1Vormwald Michael2ZF Friedrichshafen AGZF Friedrichshafen AGMaterials Mechanics Group, Technische Universität DarmstadtThe fatigue assessment of notches under multiaxial and non-proportional service loading is challenging. Simple models (e.g. local strain approach based on normal stress and strain) are of poor quality for this general case of stress states and ductile material behavior. Advanced approaches show high accuracy, but require additional material testing and calibration. From an engineering point of view, deviations are tolerable to a certain extent. This contribution introduces two approaches for modeling multiaxial notch fatigue which are easy to apply. The first approach is an extension of the classical local strain approach. The second approach implements a simplified multiaxial notch approximation which enables the use of the extended short crack model in practical applications. A large database with experiments on notched components under multiaxial stresses is set up and used to validate the proposed algorithms. Results show the effectiveness of both approaches for ductile steels. Both approaches can be useful for engineers who are faced to multiaxial fatigue of notched components.https://www.matec-conferences.org/articles/matecconf/pdf/2019/49/matecconf_icmff1218_13003.pdf |
| spellingShingle | Riess Christian Obermayr Martin Vormwald Michael The contrast of simplicity and accuracy in modeling multiaxial notch fatigue MATEC Web of Conferences |
| title | The contrast of simplicity and accuracy in modeling multiaxial notch fatigue |
| title_full | The contrast of simplicity and accuracy in modeling multiaxial notch fatigue |
| title_fullStr | The contrast of simplicity and accuracy in modeling multiaxial notch fatigue |
| title_full_unstemmed | The contrast of simplicity and accuracy in modeling multiaxial notch fatigue |
| title_short | The contrast of simplicity and accuracy in modeling multiaxial notch fatigue |
| title_sort | contrast of simplicity and accuracy in modeling multiaxial notch fatigue |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2019/49/matecconf_icmff1218_13003.pdf |
| work_keys_str_mv | AT riesschristian thecontrastofsimplicityandaccuracyinmodelingmultiaxialnotchfatigue AT obermayrmartin thecontrastofsimplicityandaccuracyinmodelingmultiaxialnotchfatigue AT vormwaldmichael thecontrastofsimplicityandaccuracyinmodelingmultiaxialnotchfatigue AT riesschristian contrastofsimplicityandaccuracyinmodelingmultiaxialnotchfatigue AT obermayrmartin contrastofsimplicityandaccuracyinmodelingmultiaxialnotchfatigue AT vormwaldmichael contrastofsimplicityandaccuracyinmodelingmultiaxialnotchfatigue |