Development of an inverse method for material characterization

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Proceedings titleProceedings of Advances in Hydroelectric Turbine Manufacturing and Repair
ConferenceMaterials Science and Technology 2013, October 27-31, 2013, Montreal, QC, Canada
Subjectinverse method; finite-element simulation; material properties
AbstractConventional engineering analysis involves the determination of material properties under uniaxial loading conditions. The true stress-true strain curves generated through this way have been used in finite element modeling (FEM) of various forming processes. However, this method is only valid up to the onset of necking; after this point the stress state is not uniaxial and the errors between FEM results and experimental data are significant. In this paper a new work hardening equation for predicting material behavior after the instability was used for stainless steel 321 (SS 321) and Inconel 718 IN 718). A finite element model based on an inverse method was devised with the aim of determining the properties of isotropic materials after instability. To facilitate the process of material characterization, an algorithm was developed using LS-DYNA and Matlab software. Verification of this methodology was carried out by comparing the experimental load-displacement data (obtained by tensile testing) with the simulation results.
Publication date
AffiliationAerospace; National Research Council Canada
NoteA CD-only volume
Peer reviewedYes
NPARC number21274931
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Record identifier07e725dc-7c5e-4299-b85a-9cc38574a708
Record created2015-05-01
Record modified2016-05-09
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