Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
771636 | Engineering Fracture Mechanics | 2006 | 9 Pages |
Abstract
R-curve measurements on PZT poled in thickness direction were carried out on CT specimens under different electric boundary conditions. The effect of specimen geometry was evaluated by measuring R-curves in CT specimens of different thickness and comparing these with R-curves in bend bars. A low coercive stress is responsible for the development of a large switching zone. This switching zone is of high relevance for the computation of the actual stress intensity factor at the crack tip and for the R-curve calculation.
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Authors
A.B. Kounga Njiwa, T. Fett, D.C. Lupascu, J. Rödel,