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Combined hardening parameters of steel CK45 under cyclic strain-controlled loading: Calibration methodology and numerical validation

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dc.contributor.author Paygozar, B.
dc.contributor.author Dizaji, S. A.
dc.contributor.author Sadigh, M. A. Saeimi
dc.date.accessioned 2021-01-12T08:55:03Z
dc.date.available 2021-01-12T08:55:03Z
dc.date.issued 2020-06
dc.identifier.issn 2289-4659
dc.identifier.uri https://doi.org/10.15282/jmes.14.2.2020.24.0536
dc.identifier.uri http://hdl.handle.net/20.500.12485/695
dc.description.abstract This study is to indicate the methodology of investigating the behavior of materials in the plastic domain while bearing cyclic loading i.e. low cycle fatigue. Materials under such loading, which experience huge amount of plastic deformation, are affected by the hardening or softening effects of loading which should be taken into account in all applications and numerical simulations as well. This work investigates the methodology of obtaining the nonlinear isotropic and kinematic hardening of steel CK45. To find the parameters of the above mentioned combined nonlinear isotropic/kinematic hardening one tensile test as well as three strain-controlled low cycle fatigue tests are carried out to extract the monotonic stress/strain curve and three diagrams of hysteresis curves, respectively. Then, four parameters necessary to simulate the nonlinear isotropic/ kinematic behavior of the material are extracted by means of curve fitting technique using MATLAB software. Afterwards, the accuracy of the data extracted from the experimental tests using the proposed methodology, are verified in a finite element package, ABAQUS, through implementing two user defined subroutines UMAT written in FORTRAN. It is indicated that the computed constants draw stress-strain curves much closer to experimental responses than isotropic hardening model does. Eventually, the numerical results acquired by simulating the behavior of the sample under cyclic loading with importing the constants, calculated via combined hardening model, to ABAQUS reflects results highly close to the experimentally obtained response of the sample. It means that the procedure used to find the constants is accurate enough and consequently the constants computed are able to be used in both ABAQUS and subroutines. en_US
dc.language.iso en en_US
dc.publisher UNIV MALAYSIA PAHANG, LEBUHRAYA TUN RAZAK, GAMBANG, KUANTAN, PAHANG, 26300, MALAYSIA en_US
dc.subject Engineering, Mechanical en_US
dc.title Combined hardening parameters of steel CK45 under cyclic strain-controlled loading: Calibration methodology and numerical validation en_US
dc.type Article en_US
dc.relation.journal JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES en_US
dc.identifier.issue 2 en_US
dc.identifier.startpage 6848 en_US
dc.identifier.endpage 6855 en_US
dc.identifier.volume 14 en_US


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