Aufsatz in einer Fachzeitschrift
An extended model for electrostatic tractions at crack faces in piezoelectrics



Details zur Publikation
Autor(inn)en:
Ricoeur, A.; Gellmann, R.
Publikationsjahr:
2011
Zeitschrift:
Proceedings of SPIE
Seitenbereich:
79780L
Jahrgang/Band:
7978
Seitenumfang:
11
ISSN:
0277-786X

Zusammenfassung, Abstract


Recently, the theoretical framework of fracture mechanics of piezoelectrics has been extended to include electrostatically induced mechanical tractions in crack models yielding a significant crack closure effect. (1-3) However, these models are still simple, neglecting e.g. the piezoelectric field coupling. In this work, an extended model for crack surface tractions is presented yielding some interesting effects. In particular, it is predicted that the Mode-I stress intensity factor is influenced by both a collinear normal stress parallel to the crack faces and a Mode-II shear loading. Also, the direction of electric field vs. poling direction is clearly manifested in the calculated crack loading quantities.




Schlagwörter
Coulomb stresses, crack boundary conditions, crack surface tractions, dielectric interfaces, fracture mechanics, Griffith crack, Piezoelectrics


Autor(inn)en / Herausgeber(innen)

Zuletzt aktualisiert 2019-25-07 um 13:59