03976nam a2200493 a 4500 20260818090842.0 140618s2012 th ad ||| |000 0 eng d .b1213322x AIT Thesis no.ST-12-01 Chamara, Jayasinghe Arachchilage Supun Development of hardness testing technique for the evaluation of localized yielding in steel reinforcement Pathum Thani : Asian Institute of Technology, 2012 199 leaves : ill., charts Thesis ; no. ST-12-01 A thesis submitted in partial fulfillment of the r equirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology Thesis (M. Eng.) - Asian Institute of Technology, 2012 There are many residual strain detecting methods at the present but none of them are suitable to detect residual strain of steel reinfor cement bar due to cost of experiment and reliability of results. This study mainly focused o n identification of relationship between the load {u2013} displacement curve of macro- hardness te st and residual strain of rebar. The extent of the past studies covers the interpretatio n of elastic properties, e.g. elastic modulus and yield stress, from load {u2013} displacement relationship by nano {u2013} 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 {u2013} indentation. The axisymmetric and the three dimensional finite eleme nt simulation are used to develop the relationship between load {u2013} displacement curve of i ndentation 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 r esidual strain is the characteristic relationship between load and displacement from ind entation test. In this research, there are shown the pattern of the load {u2013} displacement cu rves are changed with the direction of the indentation, the curvature of the surface and t he dimensions of test specimen. In detail comparison results of each case are presented in th is thesis. Reinforcing bars Hardness Testing Concrete beams Testing Punchet Thammarak, Chairperson Pennung Warnitchai, Examination Committee Thanakorn Pheeraphan, Examination Committee Raktipong Sahamitmongkol, Examination committee Thailand (HM King), Scholarship donor Asian Institute of Technology. Thesis ; no. ST-12-01 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B03998 .b1213322x mnait j 240404 0 140618 m a j 0 000:001:PDF:b1213322:001506:0:0:0:0:0:0 Abstract--AIT Thesis no.ST-12-01 n mnait mnait mnarc mnarc 20 40 67 Barcode : 30050120816508 CREATED : 2014-06-23 RECORD # : i12814398 LPATRON : 1026169 LCHKIN : 2016-01-27 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050120566830 CREATED : 2014-06-23 RECORD # : i12814404 LPATRON : 1026263 LCHKIN : 2016-05-19 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050160101233 CREATED : 2016-04-22 RECORD # : i12948767 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : - CREATED : 2020-01-31 RECORD # : i13254133 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 29331 29331 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.ST-12-01 30050120816508 2026-08-18 09:08:42 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.ST-12-01 30050120566830 2026-08-18 09:08:42 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.ST-12-01 30050160101233 2026-08-18 09:08:42 1 2026-08-18 40 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.ST-12-01 2026-08-18 09:08:42 2026-08-18 67