Journal article
Quasi-static and dynamic fracture behavior of lead zirconate titanate: A study of poling and loading rate
ENGINEERING FRACTURE MECHANICS, v 247, 107669
15 Apr 2021
Abstract
In this study, coupon specimens of both poled and de-poled lead zirconate titanate (PZT) are examined under quasi-static and stress-wave loading conditions. Mode-I crack initiation and fracture behavior is examined using ultra high-speed imaging in conjunction with 2D digital image correlation on symmetrically impacted specimens. Measured displacement fields ahead of the dynamically loaded crack tip are used to extract the critical stress intensity factor (KdIC) at initiation and are compared with quasi-static SENT fracture toughness tests. Results demonstrate that under static conditions, the difference between poled and de-poled specimens is not statistically significant, however under dynamic conditions, poled samples exhibited a 70% greater fracture toughness compared to the de-poled specimens. To verify the increase was not due to thermal degradation of material mechanical properties during the de-poling process, repoled specimens were also prepared and examined under dynamic fracture loading conditions. In general, impulsively loaded samples exhibited greater fracture toughness compared to their quasi-statically loaded counterparts, regardless of the poling. Specifically, the critical stress intensity factor increased seven to tenfold compared to static fracture toughness values, with poled samples exhibiting the greatest toughness of all samples explored. In terms of rate, the increase in fracture toughness under dynamic conditions likely comes from microcracking and potentially phase transformations at the crack tip. In terms of poling, the increase in fracture toughness is likely due to a bulk manifestation of ferroelastic toughening, where dynamic domain reorientation provides crack tip shielding.
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Details
- Title
- Quasi-static and dynamic fracture behavior of lead zirconate titanate: A study of poling and loading rate
- Publication Details
- ENGINEERING FRACTURE MECHANICS, v 247, 107669
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD; OXFORD
- Grant note
- This research is supported by the National Science Foundation under grant number 1939835. The authors would also like to thank all members of the X-STRM Lab at Colorado School of Mines, Derek Jacobsen and Professor Ivar Reimanis for their invaluable input during the course of this project.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Drexel University
- Web of Science ID
- WOS:000639812700002
- Scopus ID
- 2-s2.0-85102969697
- Other Identifier
- 991021860671004721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Mechanics