Development of hardness testing technique for the evaluation of localized yielding in steel reinforcement | |
| Author | Chamara, Jayasinghe Arachchilage Supun |
| Call Number | AIT Thesis no.ST-12-01 |
| Subject(s) | Reinforcing bars Hardness--Testing Concrete beams--Testing |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-12-01 |
| Abstract | There are many residual strain detecting methods at the present but none of them are suitable to detect residual strain of steel reinforcement bar due to cost of experiment and reliability of results. This study mainly focused on identification of relationship between the load – displacement curve of macro- hardness test and residual strain of rebar. The extent of the past studies covers the interpretation of elastic properties, e.g. elastic modulus and yield stress, from load – displacement relationship by nano – indentation. However, no one has proposed the technique used for investigation of residual strain. This research fully based on the numerical simulation of the macro – indentation. The axisymmetric and the three dimensional finite element simulation are used to develop the relationship between load – displacement curve of indentation and material properties including residual strain of material. It is shown in this thesis that the best technique for interpretation of material elastic properties and residual strain is the characteristic relationship between load and displacement from indentation test. In this research, there are shown the pattern of the load – displacement curves are changed with the direction of the indentation, the curvature of the surface and the dimensions of test specimen. In detail comparison results of each case are presented in this thesis |
| Year | 2012 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-12-01 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Punchet Thammarak; |
| Examination Committee(s) | Pennung Warnitchai;Thanakorn Pheeraphan;Raktipong Sahamitmongkol; |
| Scholarship Donor(s) | Thailand (HM King); |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2012 |