On Reliability Evaluation of a Diaphragm in a Light Touch Switch(<Special Issue>Reliability Engineering in Materials and Structures)

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概要

• 論文の詳細を見る

• Fatigue characteristics of a metal diaphragm in a light touch switch are evaluated with experimental approach considering cyclic load acting on it. The approach consumes much time and costs for evaluation. In previous paper, we have described that the mechanical properties of stainless steel have anisotropy and the fatigue characteristics must be discussed considering the large scatter of material properties induced by the anisotropy. Therefore, the purpose of this study is to establish a simple method to evaluate the reliability of diaphragms with the consideration of anisotropy. The proposed approach consists of three procedures. Firstly, residual stress after press forming is evaluated by finite element method (FEM), and response curves when the pushing load is applied on the diaphragm are also analyzed. And, the stress amplitude and the mean stress at every point on the diaphragm can be calculated. Secondly, the experimental database about S-N curve and Goodman diagram considering the effect of anisotropy have been prepared. Finally, the fatigue lives considering failure probabilities on the diaphragm can be estimated by comparison of Goodman diagram with numerical results. Obtained results revealed that the proposed approach is very useful for the reliability evaluation of the diaphragm.

• 社団法人日本材料学会の論文
• 2002-09-15

著者

• ZAKO Masaru

  Department of Manufacturing Science, Osaka University

• Fukuda Masao

  Tsuyama Matsushita Electric Industrial Co. Ltd.

• KURASHIKI Tetsusei

  Department of Manufacturing Science, Osaka University

• HANAKI Satoshi

  Department of Mechanical Engineering, Himeji Institute of Technology University

• NAKAI Hiroaki

  Osaka University

• ITO Atsuji

  Matsushita Electric Industrial Co. Ltd

• NAKAI Hiroaki

  Graduate Student of Osaka University, Japan

• Nakai H

  Department Of Pediatrics Nara Medical University

• Ito Atsuji

  Matsushita Electric Industrial Co. Ltd.

• Nakai Hiroaki

  Graduate Student Of Osaka University Japan

• Hanaki S

  Department Of Mechanical Engineering Himeji Institute Of Technology University

• Kurashiki Tetsusei

  Department Of Manufacturing Science Osaka University

• Hanaki Satoshi

  Department Of Mechanical Engineering Himeji Institute Of Technology University

• Nakai H

  Graduate Student Of Osaka University Japan

• Zako M

  Osaka Univ. Suita City Jpn

• Zako Masaru

  Department Of Management Of Industry And Technology Graduate School Of Engineering Osaka University

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