Estimation of Work-hardening Curve for Large Strain Using Friction-free Compression Test

Usami, Masaharu; Oya, Tetsuo

doi:10.1016/j.proeng.2014.10.008

Cited by 6 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The idea of the least-square optimization method is the minimizing the error of estimation between experimental and numerical data. The technique is described in more detail in [57][58][59]. The error ‖𝑍𝑍‖ is computed as follows (Eq.…”

Section: Optimization Proceduresmentioning

confidence: 99%

Computational Methods of the Identification of Chaboche Isotropic-Kinematic Hardening Model Parameters Derived from the Cyclic Loading Tests

Wójcik,

Gontarz,

Skrzat

et al. 2024

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

The Chaboche-Lemaitre combined isotropic-kinematic hardening model (CKIH) gives an overall information about the material behaviour under cyclic loading. The identification of hardening parameters is a difficult and time-consuming problem. The procedure of the parameters identification using the experimental hysteresis curve obtained in a cyclic loading test under strain control is presented in details here for a S235JR construction steel. The last stabilized cycle extracted from the hysteresis curve is required for the identification of hardening parameters. The model with three backstresses is tested here. The optimization algorithm is also used for the improvement of the agreement between experimental and numerical data. In order to include some uncertainty of experiment and the identification procedure, the authorial algorithm written on the basis of the fuzzy logic soft-computing method is applied here. The results obtained show that the identification procedure presented in this paper ensures the good agreement between the experimental tests and numerical calculations. The correct selection of parameters associated with the hardening is essential for the right description of material behaviour subject to loading in different engineering problems, including in metal forming processes.

show abstract

Section: Optimization Proceduresmentioning

confidence: 99%

Computational Methods of the Identification of Chaboche Isotropic-Kinematic Hardening Model Parameters Derived from the Cyclic Loading Tests

Wójcik,

Gontarz,

Skrzat

et al. 2024

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

show abstract

“…Therefore, removing the influence of friction on the deformation of compression specimen may be one of the feasible ways for determining the hardening curve to large strains. Usami and Oya 13 designed a dumbbell-shaped compression specimen and a pair of special platens with jigs. The jigs could eliminate the effects of friction in the initial stage of compression deformation, however, the influences of friction still exist in the stage of large plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Methods for measuring friction-independent flow stress curve to large strains using hyperbolic shaped compression specimen

Chen

Guan

Xing

et al. 2021

The Journal of Strain Analysis for Engineering Design

View full text Add to dashboard Cite

The accurate measurement of flow stress curve to large strains using cylindrical compression specimen is always a great challenge due to the influence of friction. Recently, the present authors designed a hyperbolic shaped compression (HSC) specimen which can yield an average true stress- strain curve independent of friction and proposed a stress correction function for fast estimation of flow stress curve to large strains. The aim of this paper is threefold. Firstly, to investigate whether the analytical method for stress correction of tensile necking can, or cannot, be extended to HSC specimen for correcting average true stress into flow stress. Secondly, to develop an inverse method based on Kriging surrogate model for identifying the optimal parameters of modified Voce model using HSC specimen. Lastly, the advantages and disadvantages of these three methods were compared and the recommendations for application were also discussed. The results show that the analytical method is more suitable to the stress correction for material with higher n-value but shows worse capability for correcting flow stress related to large strains for material with lower n-value. For Q420 steel, the maximum strain achieved by HSC specimen (0.8) is far higher than that achieved by cylindrical tension specimen (0.55). The analytical method can correct the flow stress in the strain range of 0–0.5 effectively but underestimating the flow stress in the strain range of 0.5–0.8 due to its low n-value. Both inverse method and stress correction function can determine the flow stress in the strain range of 0–0.8 successfully. Thus, for isotropic material with tension–compression yield symmetry, it is recommended to use the HSC specimen instead of conventional tension and compression tests of cylindrical specimens to determine the flow stress curve to large strains.

show abstract

Determination of the Flow Stress of Material Based on a Friction-Independent Test on a Simple Geometry

Rahiman

Muthu

Dixit

et al. 2022

Advances in Forming, Machining and Automation

View full text Add to dashboard Cite

Estimation of Work-hardening Curve for Large Strain Using Friction-free Compression Test

Cited by 6 publications

References 11 publications

Computational Methods of the Identification of Chaboche Isotropic-Kinematic Hardening Model Parameters Derived from the Cyclic Loading Tests

Computational Methods of the Identification of Chaboche Isotropic-Kinematic Hardening Model Parameters Derived from the Cyclic Loading Tests

Methods for measuring friction-independent flow stress curve to large strains using hyperbolic shaped compression specimen

Determination of the Flow Stress of Material Based on a Friction-Independent Test on a Simple Geometry

Contact Info

Product

Resources

About