Abstract
For studying slow crack growth in portland cement mortar 32″ (812.8 mm) long double torsion specimens were tested. During testing, the loading and reloading compliances, permanent (or inelastic) deformations and crack growth were measured. It was observed that the strain energy release rates calculated from elastic, secant or reloading compliances do not accurately represent the fracture behavior of this material. A modified definition of the strain energy release rate is developed here to include both the elastic and the inelastic strain energy absorbed during crack extension. For this method, in addition to the reloading compliance, the knowledge of the rate of change of permanent deformations with crack growth is necessary. Details of the analytical and experimental procedure are described in this paper.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 833-844 |
| Number of pages | 12 |
| Journal | Cement and Concrete Research |
| Volume | 10 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1980 |
Funding
This research was supported by a grant from the National Science Foundation (ENG 77-23534) to the University of Illinois at Chicago Circle. The research grant is under the supervision of A. E. Naaman and S. P. Shah of the Department of Materials Engineering.
ASJC Scopus subject areas
- Building and Construction
- General Materials Science