Fatigue crack growth of aluminium alloy 7075-T651 under non-proportional mixed mode I and II loads
This study aims to investigate fatigue growth behaviour in AA7075-T651 under non-proportional mixed mode I and II loads. Fatigue tests were performed under cyclic tension and torsion using a thin-walled tubular specimen with a key-hole style crack starter. After the generation of a single-side mode...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2016-10-01
|
| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | https://www.fracturae.com/index.php/fis/article/view/1782 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841562846225235968 |
|---|---|
| author | Xiaobo Yu Ling Li Gwenaelle Proust |
| author_facet | Xiaobo Yu Ling Li Gwenaelle Proust |
| author_sort | Xiaobo Yu |
| collection | DOAJ |
| description | This study aims to investigate fatigue growth behaviour in AA7075-T651 under non-proportional mixed mode I and II loads. Fatigue tests were performed under cyclic tension and torsion using a thin-walled tubular specimen with a key-hole style crack starter. After the generation of a single-side mode I pre-crack, varied forms of mixed mode loads were applied, which in most cases led to a short distance coplanar growth followed by a long and stable crack path deviation. It was found that under most of the non-proportional mixed mode load cases, the direction of the deviated crack path could not be reasonably predicted using the commonly accepted maximum tangential stress criterion. Meanwhile, in some cases, the crack path directions could be approximately predicted using the maximum shear stress criterion. It was also confirmed for the first time that a long, stable and noncoplanar shear mode fatigue crack growth could be produced in AA7075- T651 under non-proportional mixed mode I and II loads. |
| format | Article |
| id | doaj-art-555ba800048b4f74af4e6ccd43879912 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2016-10-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-555ba800048b4f74af4e6ccd438799122025-01-03T00:40:24ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932016-10-011038Fatigue crack growth of aluminium alloy 7075-T651 under non-proportional mixed mode I and II loadsXiaobo YuLing LiGwenaelle ProustThis study aims to investigate fatigue growth behaviour in AA7075-T651 under non-proportional mixed mode I and II loads. Fatigue tests were performed under cyclic tension and torsion using a thin-walled tubular specimen with a key-hole style crack starter. After the generation of a single-side mode I pre-crack, varied forms of mixed mode loads were applied, which in most cases led to a short distance coplanar growth followed by a long and stable crack path deviation. It was found that under most of the non-proportional mixed mode load cases, the direction of the deviated crack path could not be reasonably predicted using the commonly accepted maximum tangential stress criterion. Meanwhile, in some cases, the crack path directions could be approximately predicted using the maximum shear stress criterion. It was also confirmed for the first time that a long, stable and noncoplanar shear mode fatigue crack growth could be produced in AA7075- T651 under non-proportional mixed mode I and II loads.https://www.fracturae.com/index.php/fis/article/view/1782Fatigue crack growthNon-proportionalMixed modeAluminium alloy7075-T651 |
| spellingShingle | Xiaobo Yu Ling Li Gwenaelle Proust Fatigue crack growth of aluminium alloy 7075-T651 under non-proportional mixed mode I and II loads Fracture and Structural Integrity Fatigue crack growth Non-proportional Mixed mode Aluminium alloy 7075-T651 |
| title | Fatigue crack growth of aluminium alloy 7075-T651 under non-proportional mixed mode I and II loads |
| title_full | Fatigue crack growth of aluminium alloy 7075-T651 under non-proportional mixed mode I and II loads |
| title_fullStr | Fatigue crack growth of aluminium alloy 7075-T651 under non-proportional mixed mode I and II loads |
| title_full_unstemmed | Fatigue crack growth of aluminium alloy 7075-T651 under non-proportional mixed mode I and II loads |
| title_short | Fatigue crack growth of aluminium alloy 7075-T651 under non-proportional mixed mode I and II loads |
| title_sort | fatigue crack growth of aluminium alloy 7075 t651 under non proportional mixed mode i and ii loads |
| topic | Fatigue crack growth Non-proportional Mixed mode Aluminium alloy 7075-T651 |
| url | https://www.fracturae.com/index.php/fis/article/view/1782 |
| work_keys_str_mv | AT xiaoboyu fatiguecrackgrowthofaluminiumalloy7075t651undernonproportionalmixedmodeiandiiloads AT lingli fatiguecrackgrowthofaluminiumalloy7075t651undernonproportionalmixedmodeiandiiloads AT gwenaelleproust fatiguecrackgrowthofaluminiumalloy7075t651undernonproportionalmixedmodeiandiiloads |