000 03976nam a2200493 a 4500
005 20260818090842.0
008 140618s2012 th ad ||| |000 0 eng d
035 _a.b1213322x
099 9 _aAIT Thesis no.ST-12-01
100 1 _aChamara, Jayasinghe Arachchilage Supun
245 1 0 _aDevelopment of hardness testing technique for the evaluation of localized yielding in steel reinforcement
260 _aPathum Thani :
_bAsian Institute of Technology,
_c2012
300 _a199 leaves :
_bill., charts
490 1 _aThesis ;
_vno. ST-12-01
500 _aA thesis submitted in partial fulfillment of the r equirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology
502 _aThesis (M. Eng.) - Asian Institute of Technology, 2012
520 _aThere 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.
650 0 _aReinforcing bars
650 0 _aHardness
_xTesting
650 0 _aConcrete beams
_xTesting
700 0 _aPunchet Thammarak,
_eChairperson
700 0 _aPennung Warnitchai,
_eExamination Committee
700 0 _aThanakorn Pheeraphan,
_eExamination Committee
700 0 _aRaktipong Sahamitmongkol,
_eExamination committee
710 2 _aThailand (HM King),
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. ST-12-01
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B03998
907 _a.b1213322x
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_tAbstract--AIT Thesis no.ST-12-01
_vn
945 _lmnait
945 _lmnait
945 _lmnarc
945 _lmnarc
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