Fracture behaviour of cementitious materials with randomly oriented short steel fibers | |
| Author | Misa, Joselito Somera |
| Call Number | AIT Thesis no.ST-87-18 |
| Subject(s) | Strains and stresses Cement--Testing |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | An experimental investigation was conducted to determine the susceptibility of elasto-plastic parameters such as Jintegral , Crack Opening Displacement and R-curves for fiber reinforced mortar beams. Single edge notch and double cantilever beam with varying notch depths and different volume fractions of steel fibers were tested. The results were analyzed to examine the applicability of various fracture mechanic approaches. Attempts we re made to identify a fracture parameter which is independent of test specimen geometry and can correctly predict the effect of fiber add it ion. It is found from the results that J- integral does not seem to follow any particular trend of variation with notch depth but is sensitive to the Increase of fiber fraction. Hence J-integral appears to be a useful fracture criterion for steel fiber reinforced mortar. The computed values of CODc are found to be dependent on the notch depth and so it cannot possibly be considered as a suitable fracture criterion for steel fiber reinforced mortar. Fracture behavior of the specimen have been studied using contoured double cantilever beam specimens. The influence of fiber percentage and different notch depths are investigated . Crack growth resistance curves (R-curves) were obtained using different methods available in 1iterature and compared. The R-curves obtained taking Into account the effect of permanent deformation are found to be dependent on the initial notch depth. The R-curves are found to be Influenced by the fiber fraction. The values of strain energy release rate in R-curves are found to increase with t h e increase of percentage of fiber. |
| Year | 1987 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Pama, Ricardo P. |
| Examination Committee(s) | Pichai Nimityongskul ;Chauhan, Roshan Lal |
| Scholarship Donor(s) | GERMAN ACADEMI C EXCHANGE SERVICE |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1987 |