Determination of the flow curve based on the torsion of conical specimen

The paper describes the existing methods for constructing hardening curves based on the torsion of continuous cylindrical and tubular samples. The advantages and disadvantages of the known methods are observed. It resulted in the development of an approach to determine the hardening curve based on t...

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Bibliographic Details
Published in:Procedia manufacturing 2020, Vol.50, p.520-528
Main Authors: Petrov, Pavel, Shishkin, Dmitry, Kalpin, Yuliy, Burlakov, Igor, Vydumkina, Svetlana, Kapitanenko, Denis
Format: Article
Language:English
Subjects:
conical specimen
constitutive model
cylindrical specimen
finite-element method
flow stress
inverse modelling
stress-strain curve
torsion test
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Summary:The paper describes the existing methods for constructing hardening curves based on the torsion of continuous cylindrical and tubular samples. The advantages and disadvantages of the known methods are observed. It resulted in the development of an approach to determine the hardening curve based on the torsion of a conical specimen. The specific feature of the approach is that a conical specimen of definite shape as well as sizes is applied. The experimental tests and numerical simulations were performed. A model of the torsion of conical specimen was adopted to commercial finite-element code QFORM 9.0. It allowed to investigate numerically a problem of metal forming connected to the torsion of the specimen clamped between the rotated and fixed tools. The paper shows the results of experimental studies of conical samples made of steel 20H (analogue of AISI 5120H, DIN 20CrS4) in accordance with the proposed and traditional methods. The analysis of the results of experimental studies has also been done and presented here. The numerical model of the torsion of conical specimen allowed to investigate stress-strain state parameters distribution during the process.
ISSN:2351-9789
2351-9789
DOI:10.1016/j.promfg.2020.08.094