A review on Johnson Cook material model

Sirigiri, Vasu Kumar Reddy; Gudiga, Vinith Yadav; Gattu, Uday Shankar; Suneesh, G.; Buddaraju, Krishna Mohan

doi:10.1016/j.matpr.2022.04.279

Cited by 68 publications

(26 citation statements)

References 22 publications

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“…Since no obvious elastic deformation of the pin was observed during the experiment, 19,21,29 the pin was regarded as a rigid body in the finite element model. The mechanical properties of the Ti‐6Al‐4V were obtained by the tensile test and were fitted by Johnson–Cook material model (Equation 1), 30 as shown in Figure 1D.

σ goodbreak= ((), A goodbreak+ B ε^{n}) ((), 1 goodbreak+ C \ln {\dot{ε}}^{*}) ((), 1 goodbreak- T^{* m})

where

σ

is stress;

ε

is plastic strain; A , B , and C are yield stress, strain hardening modulus, and strengthening factor of strain rate; n and m are strain hardening factor and thermal softening coefficient; and

{\dot{ε}}^{*}

and

T^{* m}

are represented as the dimensionless strain rate and the homologous temperature.…”

Section: Methodsmentioning

confidence: 99%

“…The 21 Schematic of the fretting fatigue test apparatus, (B) dimensions of the finite element model, (C) the boundary conditions, and (D) Ti-6Al-4V tensile test curve and its fitted curve. [Colour figure can be viewed at wileyonlinelibrary.com] mechanical properties of the Ti-6Al-4V were obtained by the tensile test and were fitted by Johnson-Cook material model (Equation 1), 30 as shown in Figure 1D.…”

Section: Methodsmentioning

confidence: 99%

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Numerical simulation of the effect of surface microgeometry and residual stress on conformal contact fretting fatigue crack initiation behavior

Song

Pei

et al. 2023

Fatigue Fract Eng Mat Struct

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Conformal contact is a commonly presented contact form in assemblies. Nonproportional loading is the main characteristics of conformal contact, which leads to prominent difficulty in revealing fretting crack behavior. In this paper, a finite element prediction model for Ti-6Al-4V pin-hole contact fretting fatigue crack initiation was developed, which simultaneously considered the effect of fretting wear, surface roughness, surface skewness, surface kurtosis, and residual stress. The results show that phase differences of stress component, change in direction of principal stress, and high stress gradient are the main reasons for the initiation of fretting fatigue under conformal contact condition. The model based on the Fatemi-Socie (FS) parameter successfully predicted the location, orientation, and fatigue life of crack initiation, which agrees well with the experimental results. Additionally, machining-induced residual stress can effectively inhibit mode I crack initiation at valleys. Moreover, ignoring the surface microgeometry characteristics reduces the prediction accuracy of the crack behavior.

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σ goodbreak= ((), A goodbreak+ B ε^{n}) ((), 1 goodbreak+ C \ln {\dot{ε}}^{*}) ((), 1 goodbreak- T^{* m})

where

σ

is stress;

ε

is plastic strain; A , B , and C are yield stress, strain hardening modulus, and strengthening factor of strain rate; n and m are strain hardening factor and thermal softening coefficient; and

{\dot{ε}}^{*}

and

T^{* m}

are represented as the dimensionless strain rate and the homologous temperature.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Numerical simulation of the effect of surface microgeometry and residual stress on conformal contact fretting fatigue crack initiation behavior

Song

Pei

et al. 2023

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…At the same time, the model reflects the mechanical stress of metals under high strain, a high strain rate and high temperature, and is usually used for ductile materials. The flow stress is expressed by Equation (1) [ 23 ].

where 𝜀 p ,

and

are the equivalent plastic strain, equivalent plastic strain rate and reference strain rate, respectively.…”

Section: Methodsmentioning

confidence: 99%

Research on the Cutting Force and Serrated Chips in Ultra-Precision Micro-Grooving of SLM Ti6Al4V Alloy

et al. 2023

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Selective laser melting (SLM) has significant advantages in the near net shape manufacturing of metal parts with complex geometries. However, SLM parts usually have problems such as poor surface quality and low dimensional accuracy, which require post-processing. This paper focuses on the research around the influence of ultra-precision micro-grooving the SLM Ti6Al4V alloy on the cutting force and serrated chips. The influence of the processing parameters on the cutting force and surface processing quality was analyzed in detail, and the cutting simulation model of the SLM Ti6Al4V alloy was established. The formation process of the serrated chip was successfully simulated, and the experiments verified the reliability of the established model. The research results show that the dynamic cutting force and surface processing quality are mainly related to the depth of cut, and the two trends are consistent. It is also shown that the serrated chip begins on the free surface of the workpiece and propagates deeply in the shear zone, forming a shear band, and its serrated nodules move upward and forward to form periodic serrated chips.

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“…The plastic displacement at the point of failure (

) can be entered into the equation below such that it grows in proportion to the displacement ( d ) at the point of failure. When the damage variable is equal to 1, the chip separation requirements are enabled by material failure [ 34 ].

…”

Section: Methodsmentioning

confidence: 99%

“…The coefficient is uniform in all secondary shear zones between the chip and the cutting tool. AdvantEdge TM provides friction conditions based on the Coulomb friction model [ 34 ], whose equation is:

…”

Section: Methodsmentioning

confidence: 99%

Sustainable Machining of Mg-9Al-1.4Zn Foam Used for Temporary Biomedical Implant Using Cryogenic Cooling

et al. 2022

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In this study, the drilling performance of biodegradable grade Mg-9Al-1.4Zn alloy reinforced with hollow thin-walled Al2O3 microspheres is inspected under different coolant environments such as dry, Almag® mineral oil, and liquid nitrogen. Drilling experiments were carried out using titanium aluminum nitride PVD coated and uncoated K10 tools on varying volume fractions of magnesium syntactic foams (5%, 10%, and 15%) reinforced with hollow Al2O3 microspheres. Test results showed a 30–60% higher thrust force generated with liquid nitrogen drilling in comparison to dry and oil-based drilling while cutting higher volume fraction foams. Higher microsphere volume fractions of syntactic foam recorded higher machining forces, which is roughly a 200% increase as the volume fraction raised to 15%. The performance of TiAlN PVD tool coating is reflected through a reduction in thrust forces by 20% during cryogenic drilling. Scanning electron microscope (SEM) investigation of cryogenic-machined bore surfaces showed minimal drilling-induced surface defects compared to dry and Almag® mineral oil conditions. A three-dimensional, thermo-mechanical finite element-based model for drilling Mg-9Al-1.4Zn syntactic foam using AdvantEdgeTM is developed for different sustainable lubrication conditions. Surface finish (Ra) showed a 45–55% improvement during cryogenic drilling of 15% syntactic foams with minimized subsurface damages compared to dry and wet cutting conditions. The higher the volume fraction, the higher the surface roughness (Ra) and thrust force under cryogenic machining.

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A review on Johnson Cook material model

Cited by 68 publications

References 22 publications

Numerical simulation of the effect of surface microgeometry and residual stress on conformal contact fretting fatigue crack initiation behavior

Numerical simulation of the effect of surface microgeometry and residual stress on conformal contact fretting fatigue crack initiation behavior

Research on the Cutting Force and Serrated Chips in Ultra-Precision Micro-Grooving of SLM Ti6Al4V Alloy

Sustainable Machining of Mg-9Al-1.4Zn Foam Used for Temporary Biomedical Implant Using Cryogenic Cooling

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