The Library
Stress-dependent elastic properties of porous microcracked ceramics
Tools
Pozdnyakova, Irina, Bruno, Giovanni, Efremov, Alexander M., Clausen, Bjørn and Hughes, Darren J. (2009) Stress-dependent elastic properties of porous microcracked ceramics. Advanced Engineering Materials, 11 (12). pp. 1023-1029. doi:10.1002/adem.200900192 ISSN 1438-1656.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1002/adem.200900192
Abstract
Although ceramics are considered linear elastic materials, we have observed a non-linear pseudo-elastic behavior in porous cellular microcracked ceramics such as β-eucryptite. This is attributed to the evolution of microstructure in these materials. This behavior is particularly different from that of non-microcracked ceramics such as silicon carbide. It is shown that in microcracked materials two processes, namely stiffening and softening, always compete when a compressive external load is applied. The first regime is attributed to microcrack closure, and the second to microcracks opening, i.e. to a damage introduced by the applied stress. On the other hand rather a continuous damage is observed in the non-microcracked case. A comparison has been done between the microscopic (as measured by neutron diffraction) and the macroscopic stress-strain response. Also, it has been found that at constant load a significant strain relaxation occurs, which has two timescales, possibly driven by the two phenomena quoted above. Indeed, no such relaxation is observed for non-microcracked SiC. Implications of these findings are discussed.
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||
Journal or Publication Title: | Advanced Engineering Materials | ||||
Publisher: | Wiley - V C H Verlag GmbH & Co. KGaA | ||||
ISSN: | 1438-1656 | ||||
Official Date: | December 2009 | ||||
Dates: |
|
||||
Volume: | 11 | ||||
Number: | 12 | ||||
Page Range: | pp. 1023-1029 | ||||
DOI: | 10.1002/adem.200900192 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |