Deformation and Fracture of Piezoelectric Ceramics(Student Poster Session)

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概要

• 論文の詳細を見る

• The true stress-strain relation calculated from the relations of load against tensile and compressive surface strains under the Bernoulli's assumption of deformation of beam show nonlinearity and is different between tension and compression. The nonlinearity of the stress and strain relation comes from domain switching induced by external loading. The degree of nonlinearity increased with the easiness of domain switching in bent specimens. The fracture strength in terms of the nominal and true stresses follows the Weibull distribution. The shape parameter takes a large value around, 18 to 22, for PT and PS specimens, while it is the smallest, 7 to 8, for PL specimens. NP specimens take a value in between. The mean strength is the largest for NP specimen and is the lowest for PL specimen. Domain switching during loading will relive local stress concentrations of defects within the material, thus increase the strength and the shape parameter. The change in intensity ratio of the 002 to 200 diffractions can be used to assess the degree of domain switching caused by external straining.

• 一般社団法人日本機械学会の論文
• 2001-10-20

著者

• TANAKA Keisuke

  Department of Mathematical and Computing Sciences, Tokyo Institute of Technology

• AKINIWA Yoshiaki

  Department of Mechanical Engineering, Nagoya University

• Tanaka Keisuke

  Department Of Cardiovascular Surgery Nagoya Daini Red Cross Hospital

• Akiniwa Yoshiaki

  Department Of Engineering Science Kyoto University

• Sakaida Y

  Dept. Of Mechanical Engineering Shizuoka Univ.

• Shirakihara Kaori

  JSPS Research Fellow, Japan Fine Ceramics Center

• SHIRAKIHARA Kaori

  Graduate School, Department of Mechanical Engineering, Nagoya University

• SAKAIDA Yoshihisa

  Department of Mechanical Engineering, Shizuoka University

• Sakaida Yoshihisa

  Department Of Mechanical Engineering Faculty Of Engineering Shizuoka University

• Tanaka Keisuke

  Department Of Applied Chemistry Waseda University

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