Material characterization for plane and curved sheets using the in-plane torsion test – An overview

Traphöner, Heinrich; Clausmeyer, Till; Tekkaya, A. Erman

doi:10.1016/j.jmatprotec.2018.02.030

Cited by 33 publications

(13 citation statements)

References 12 publications

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“…2). More recent investigations of the in-plane torsion test by Traphöner et al [13] focus on the use of grooved specimens and optical strain measurement in order to evaluate accurate flow curves to even higher true strains.…”

Section: Introductionmentioning

confidence: 99%

Flow curves up to high strains considering load reversal and damage

2019

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The new idea is to produce specimens by forward rod extrusion, where in the core of the extrudate a deviatoric tension-loading is present, which is superposed by an adjustable hydrostatic pressure. Various damage levels are hence possible in the extrudate. Conducting tensile and upsetting tests with the pre-strained specimens both the influence of a load reversal as well as the material weakening through ductile damage on the resulting flow curve is explored. Not only can the results be utilized to identify flow curves of materials up to high strains (ε > 1.7), but also to get new insights into the plastic material behaviour, which can be used for generating or adapting new damage models as well as kinematic hardening models under cold forging conditions. The proposed method was first assessed by means of analytical and numerical methods and then validated experimentally, by the example of the typical cold forging steel 16MnCrS5.

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Section: Introductionmentioning

confidence: 99%

Flow curves up to high strains considering load reversal and damage

2019

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“…In addition to many products such as switches, fasteners, torsion testing is frequently applied to test biomedical equipments. The measurable values with torsion test include; the yield-shear strength, modulus of elasticity in shear, torsional fatigue life, ductility, ultimate shear strength, and modulus of shear [Traphöner et al 2018]. The torsion test gives highly decisive results in order to control the design of the product, increase the quality and provide that it is produced correctly.…”

Section: Introductionmentioning

confidence: 99%

Design and manufacture of the Torque test setup for small and shapeless materials

Coşkun

Çelik

Kişioğlu

2022

Turkish Journal of Engineering

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Torsion test setup FEA First metatarsal Bone PLAIn this study, the design and manufacture of torque test set up has been carried out for small and shapeless speciment. The torque sensor, which has maximum 10 Nm, is used in the test system design. The certain specification of Nema 34 step motor which use to apply torsional force to the specimens is 12 Nm, 24V and 4.2 ampere. The step motor is controlled by the HY-DIV268N-5A Step Motor Driver and the supply voltage of driver is 24 Volts. The information about the degree of the specimen rotation was taken from potantiometer. The information obtained from the sensor and potentiometer was transferred to the LabVIEW software to be representation graphically using the USB 6003 DAQ card. The first metatarsal bone modelled from computerized tomography (CT) images was produced by Ultimaker2 3D printer using polylactic acid (PLA) material. The printed bone model was tested through torsion test set up. At the same time, the 3D bone was prepared for finite element analysis. Boundary conditions were applied in the finite element analysis (FEA) model in accordance with the test setup. The produced bones using 3D printer were subjected to torsion test with the test setup. Also the modelled bone was tested in accordance with the torsion test setup by using finite element analysis. After that, the FEA and experimental test results were compared with each other. As a conclusion, the optimization of the torsional test setup was performed based on the FEA.

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“…The accurate determination of material properties of sheet metal forms the basis for numerical process analysis [1]. Experimental tests are therefore required to determine stress vs strain values, and to do so up to high values of true strain.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental tests are therefore required to determine stress vs strain values, and to do so up to high values of true strain. This is particularly significant in sheet metal forming where strain reaches values beyond 1 [1]. The single-sided shear specimen [2], shown in Figure 1(a), and Miyauchi specimen [3], shown in Figure 1(b), are two of the most commonly used specimens for shear testing.…”

Section: Introductionmentioning

confidence: 99%

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Extending the annular in-plane torsional shear test specimen to applications at high strain rates

2021

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In-plane torsional shear testing is a well-established material testing technique in the metal forming community. The corresponding specimen is designed to be machined from sheet metal with a continuous annular shear zone intended to deform in simple shear. Consequently, there are no geometric discontinuities or “edge-effects” to induce volumetric changes or instabilities with the result that large true plastic strains up to 1.0 can be achieved. This paper presents an extension of the in-plane torsional shear test to the dynamic regime. Dynamic experiments were performed using a torsional split Hopkinson bar (TSHB) on specimens manufactured from Al 1050 H14. The experimental results show that the adopted technique can be used to determine the material behavior accurately and reliably in the dynamic regime.

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Material characterization for plane and curved sheets using the in-plane torsion test – An overview

Cited by 33 publications

References 12 publications

Flow curves up to high strains considering load reversal and damage

Flow curves up to high strains considering load reversal and damage

Design and manufacture of the Torque test setup for small and shapeless materials

Extending the annular in-plane torsional shear test specimen to applications at high strain rates

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