Journal Article10.1016/J.COMMATSCI.2015.11.034
An enhanced Johnson-Cook strength model for splitting strain rate and temperature effects on lower yield stress and plastic flow
Luca Gambirasio,Egidio Rizzi +1 more
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TL;DR: Split Johnson-Cook (SJC) as mentioned in this paper is a generalization of the classical JC model and provides a much improved coherence for the plastic material description, avoiding then heavy modeling errors on the lower yield stress and on the subsequent plastic flow.
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About: This article is published in Computational Materials Science. The article was published on 15 Feb 2016.
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Citations
Johnson Cook Material and Failure Model Parameters Estimation of AISI-1045 Medium Carbon Steel for Metal Forming Applications
Mohanraj Murugesan,Dong won Jung +1 more
TL;DR: Overall, the developed model can produce a fairly accurate and precise estimation of flow behavior with good correlation to the experimental data under high temperature conditions and can be used to model the metal forming simulations, and valuable prediction results for the work material can be achieved.
196
A comparative study on Johnson-Cook and modified Johnson-Cook constitutive material model to predict the dynamic behavior laser additive manufacturing FeCr alloy
TL;DR: In this article, the effects of high strain rate and elevated temperature on the deformation behaviors of FeCr alloy specimen, obtained by laser additive manufacturing (LAM), were investigated by Split Hopkinson Pressure Bar tests with the strain rates of 1000 −8000 s −1 and temperature range of 20 −800 ˚C.
125
A unified constitutive model based on dislocation density for an Al-Zn-Mg-Cu alloy at time-variant hot deformation conditions
TL;DR: In this article, a unified constitutive model based on dislocation density was developed to study the flow behaviors of an Al-Zn-Mg-Cu alloy at elevated temperatures, uniaxial tensile tests were carried out in wide deformation temperature and strain rate ranges.
86
Hot deformation behavior and microstructure analysis of 25Cr3Mo3NiNb steel during hot compression tests
TL;DR: In this paper, the authors studied the hot deformation behavior of 25Cr3Mo3NiNb steel by means of isothermal hot compression tests and established constitutive equations based on strain compensated Arrhenius and modified Johnson-Cook models, respectively.
72
The modified temperature term on Johnson-Cook constitutive model of AZ31 magnesium alloy with {0002} texture
Feng Zhang,Feng Zhang,Zheng Liu,Yue Wang,Pingli Mao,Xinwen Kuang,Zhenglai Zhang,Yingdong Ju,Xiaozhong Xu +8 more
TL;DR: In this paper, the dynamic compression experiments with split-Hopkinson pressure bar (SHPB) were performed on AZ31 magnesium alloy rolled sheet specimens in the normal direction (AZ31-ND) with {0002} texture at the temperature of 293-523 K and the strain rate of 0.001-2200 s−1.
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References
A modified Johnson–Cook constitutive model for Mg–Gd–Y alloy extended to a wide range of temperatures
Qing Yu Hou,Jing Tao Wang +1 more
TL;DR: In this article, a phenomenological and empirically based constitutive model was proposed to change the temperature term in the original Johnson-Cook constitutive models, which can be used to describe or predict the stress-strain relation of the metals deformed over a wide range of temperatures even though the current temperatures were lower than the reference temperature.
100
The mean dynamic yield strength of copper and low carbon steel at elevated temperatures from measurements of the “mushrooming” of flat-ended projectiles
J.B Hawkyard,D Eaton,W. Johnson +2 more
TL;DR: In this paper, a mean dynamic yield strength for steel and copper was derived from strain measurements on the "mushroomed" ends of flat-ended projectiles, after impact on a flat, nominally rigid anvil.
95
Numerical prediction of fracture in the Taylor test
TL;DR: In this article, fracture phenomena and fracture mechanisms in the Taylor test are investigated numerically based on a recently developed ductile fracture locus with the cut-off value for the negative stress triaxiality at −1/3.
91
Modified Johnson-Cook model for vehicle body crashworthiness simulation
TL;DR: In this article, a new split Hopkinson bar was designed for the dynamic tensile test of sheet metals, and the results from both quasistatic and dynamic tests showed that the strain rate hardening effect for sheet metals cannot be described by the original Johnson-Cook constitutive relation.
88
A Modified Johnson-Cook Constitutive Equation to Predict Hot Deformation Behavior of Ti-6Al-4V Alloy
TL;DR: In this paper, a modified Johnson-Cook constitutive equation of Ti-6Al-4V alloy is proposed based on hot compression tests performed in the temperature range of 1073-1323 K and strain rate 0.001-1−s−1.
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