電界/荷重の同時印加による圧電セラミックスの疲労挙動

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タイトル別名
  • Fatigue Behavior of Piezoelectric Ceramics under an Applied Electric Field and Stress.
  • デンカイ カジュウ ノ ドウジ インカ ニ ヨル アツデン セラミックス ノ ヒロウ キョドウ

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抄録

Fatigue tests of ceramics are usually performed under cyclic stress. However, piezoelectric materials are used under an applied electric field and stresses are caused by the displacement. It is very important to understand the relation between the fatigue behavior and the compositional conditions. S-N curves of fatigue test in an applied electric field were composed of two curves having different gradients, acceleration was observed in the range of many time cycles. Fatigue behavior of piezoelectric ceramics considers accumulative fatigue which shows markedly decrease of strength caused by internal-crack with domain switching.

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