Multiaxial Low Cycle Fatigue Life of Sn-8Zn-3Bi Solder under Non-proportional Loading
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- ITOH Takamoto
- Department of Mechanical Engineering, Ritsumeikan University
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- YAMAMOTO Takaei
- Department of Mechanical and Energy Systems Engineering, Oita University
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- OGAWA Fumio
- Department of Mechanical Engineering, Ritsumeikan University
Bibliographic Information
- Other Title
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- 非比例負荷におけるSn-8Zn-3Biはんだの多軸低サイクル疲労寿命
- ヒヒレイ フカ ニ オケル Sn-8Zn-3Biハンダ ノ タジク テイサイクル ヒロウ ジュミョウ
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Abstract
<p>This study describes evaluation of multiaxial low cycle fatigue life of a lead-free solder, Sn-8Zn-3Bi. Strain controlled multiaxial low cycle fatigue tests under proportional and non-proportional loading conditions were carried out using a hollow cylinder specimen at room temperature. The loading conditions employed were a push-pull, a reversed torsion, a box-shape, a step-shape and a circle-shape strain paths. The former two loading conditions are the proportional loading and the latter three loading conditions are the non-proportional loading in which directions of principal stresses and strains are changed in a cycle. The effect of non-proportional loading on the fatigue life of Sn-8Zn-3Bi was investigated. The reduction in low cycle fatigue life due to non-proportional loading was identified, and the life was the shortest for the circle-shape strain path when fatigue lives were correlated by a von Mises equivalent strain range. Fatigue lives of four strain paths other than the reversed torsion strain paths were correlated within a factor of two band by an equivalent inelastic strain range. All of the fatigue lives were evaluated well by a non-proportional strain range considering the effect of additional strain hardening due to non-proportional loading, which was proved to be effective for life evaluation of the solder under non-proportional loading.</p>
Journal
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- Journal of the Society of Materials Science, Japan
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Journal of the Society of Materials Science, Japan 66 (2), 166-172, 2017
The Society of Materials Science, Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282680420692992
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- NII Article ID
- 130005240472
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- NII Book ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL BIB ID
- 027994740
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed