Formulation of damage development for piezoelectric ceramics under static compressive stress

M. Mizuno, T. Nishikata, M. Okayasu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to formulate a damage evolution equation, damage development of columnar specimens under static compressive stress was evaluated from variation of elastic coefficient based on the continuum damage mechanics. The elastic coefficient was evaluated from gradient of stress-strain relations of compression fracture tests. Then the damage evolution equation was formulated by an exponential function of strain with a threshold to start the damage development. Moreover, material functions of the damage variable were also formulated for the variation of material properties. By using the damage evolution equation and material functions, stress-strain relations were predicted properly taking into account the variation of elastic coefficient and accumulation of residual strain accompanied with damage development. Then the prediction was compared with experimental results, and the validity of the formulation was verified by the good agreement.

Original languageEnglish
Title of host publication12th International Conference on Fracture 2009, ICF-12
Pages762-770
Number of pages9
Publication statusPublished - 2009
Externally publishedYes
Event12th International Conference on Fracture 2009, ICF-12 - Ottawa, ON, Canada
Duration: Jul 12 2009Jul 17 2009

Publication series

Name12th International Conference on Fracture 2009, ICF-12
Volume1

Other

Other12th International Conference on Fracture 2009, ICF-12
CountryCanada
CityOttawa, ON
Period7/12/097/17/09

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Mizuno, M., Nishikata, T., & Okayasu, M. (2009). Formulation of damage development for piezoelectric ceramics under static compressive stress. In 12th International Conference on Fracture 2009, ICF-12 (pp. 762-770). (12th International Conference on Fracture 2009, ICF-12; Vol. 1).