Investigation of the dragging stress of aluminium under cyclic loading
The effect of the variation of the dislocation velocity on the dragging stress of aluminium under cycling loading has been investigated. Hydrogen diffusion around a dislocation was simulated by the finite difference method, and the dragging stress was calculated from the hydrogen distribution. The v...
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The Japan Society of Mechanical Engineers
2024-11-01
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| Series: | Mechanical Engineering Journal |
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| Online Access: | https://www.jstage.jst.go.jp/article/mej/11/6/11_24-00291/_pdf/-char/en |
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| author | Shota HASUNUMA Tomoyuki HAYASE |
| author_facet | Shota HASUNUMA Tomoyuki HAYASE |
| author_sort | Shota HASUNUMA |
| collection | DOAJ |
| description | The effect of the variation of the dislocation velocity on the dragging stress of aluminium under cycling loading has been investigated. Hydrogen diffusion around a dislocation was simulated by the finite difference method, and the dragging stress was calculated from the hydrogen distribution. The velocity of the dislocation changed in a sinusoidal manner. The dragging stress depended on the frequency of the sinusoidal velocity variation. In the low-velocity region, the maximum dragging stress decreased with increasing frequency. However, in the mid-velocity region, the maximum dragging stress increased with increasing frequency. The dragging stress did not depend on the frequency in the high-velocity region. A dragging stress model for aluminium with hydrogen under a variable dislocation velocity is proposed. When the frequency is below 0.2 kHz (i.e., in general fatigue tests), the dragging stress–velocity relationship under a constant velocity of the dislocation in the case of aluminium with hydrogen can be used. In the high-velocity region, the dragging stress can be determined using the relationship between the dragging stress and velocity under a constant velocity of the dislocation. The dragging stress under the low-velocity condition can be modelled using an ordinary viscosity model. In the case of actual hydrogen concentration, the dragging stress is thought to be much smaller than 1 MPa. |
| format | Article |
| id | doaj-art-b810d5a9aa8b476abf2ea4d3fe47d4e0 |
| institution | DOAJ |
| issn | 2187-9745 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Mechanical Engineering Journal |
| spelling | doaj-art-b810d5a9aa8b476abf2ea4d3fe47d4e02025-08-20T02:49:00ZengThe Japan Society of Mechanical EngineersMechanical Engineering Journal2187-97452024-11-0111624-0029124-0029110.1299/mej.24-00291mejInvestigation of the dragging stress of aluminium under cyclic loadingShota HASUNUMA0Tomoyuki HAYASE1Department of Mechanical Engineering, Aoyama Gakuin UniversityDepartment of Mechanical Engineering, Aoyama Gakuin UniversityThe effect of the variation of the dislocation velocity on the dragging stress of aluminium under cycling loading has been investigated. Hydrogen diffusion around a dislocation was simulated by the finite difference method, and the dragging stress was calculated from the hydrogen distribution. The velocity of the dislocation changed in a sinusoidal manner. The dragging stress depended on the frequency of the sinusoidal velocity variation. In the low-velocity region, the maximum dragging stress decreased with increasing frequency. However, in the mid-velocity region, the maximum dragging stress increased with increasing frequency. The dragging stress did not depend on the frequency in the high-velocity region. A dragging stress model for aluminium with hydrogen under a variable dislocation velocity is proposed. When the frequency is below 0.2 kHz (i.e., in general fatigue tests), the dragging stress–velocity relationship under a constant velocity of the dislocation in the case of aluminium with hydrogen can be used. In the high-velocity region, the dragging stress can be determined using the relationship between the dragging stress and velocity under a constant velocity of the dislocation. The dragging stress under the low-velocity condition can be modelled using an ordinary viscosity model. In the case of actual hydrogen concentration, the dragging stress is thought to be much smaller than 1 MPa.https://www.jstage.jst.go.jp/article/mej/11/6/11_24-00291/_pdf/-char/ennumerical simulationdragging stresshydrogencorrosion fatiguedislocation |
| spellingShingle | Shota HASUNUMA Tomoyuki HAYASE Investigation of the dragging stress of aluminium under cyclic loading Mechanical Engineering Journal numerical simulation dragging stress hydrogen corrosion fatigue dislocation |
| title | Investigation of the dragging stress of aluminium under cyclic loading |
| title_full | Investigation of the dragging stress of aluminium under cyclic loading |
| title_fullStr | Investigation of the dragging stress of aluminium under cyclic loading |
| title_full_unstemmed | Investigation of the dragging stress of aluminium under cyclic loading |
| title_short | Investigation of the dragging stress of aluminium under cyclic loading |
| title_sort | investigation of the dragging stress of aluminium under cyclic loading |
| topic | numerical simulation dragging stress hydrogen corrosion fatigue dislocation |
| url | https://www.jstage.jst.go.jp/article/mej/11/6/11_24-00291/_pdf/-char/en |
| work_keys_str_mv | AT shotahasunuma investigationofthedraggingstressofaluminiumundercyclicloading AT tomoyukihayase investigationofthedraggingstressofaluminiumundercyclicloading |