| Author | Cheung, Chiu Lun |
| Call Number | AIT Thesis no.ST-90-4 |
| Subject(s) | Fracture mechanics
|
| Note | A thesis submitted in partial fulfillments of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Pullout test of anchor bolt is carried out _on concrete specimen to have the complete crack
growth. Experimental and theoretical studies are conducted with a main objective to clarify its
major mechanism of fracture. Using the laser speckle method, the length of macrocrack and the
distribution of crack opening displacement are measured. It is found that the initiation of crack
is under mixed mode and contains both normal opening component and shear sliding component.
With progression of fracture, the normal opening component dominates the shear sliding.
The prediction by Dugdale-Barenblatt-type model with linear tension-softening relation for
pure mode I is compared with the experimental results. The prediction is far from the experimental
results when the used critical opening displacement value is 25 µm . On the other hand, a reasonable agreement is obtained when the value is 2 µm for the linear tension-softening relation.
The crack path is determined from the experimental result to avoid the heavy computation for
tracing the crack path.
The corresponding process zone size is small. Accordingly, linear elastic fracture mechanics
is applicable to this problem. The agreement of the results of LEFM with the results obtained
from process zone model and with the experimental results are satisfactory. |
| Year | 1990 |
| 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) | Horii, Hideyuki
|
| Examination Committee(s) | Ueda, Tamon ;Pichai Nimityongskul
|
| Scholarship Donor(s) |
The Royal Thai Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |