The Use of Genetic Algorithms to Calibrate Johnson–Cook Strength and Failure Parameters of AISI/SAE 1018 Steel

Buchely, Mario F.; Wang, X.; Aken, David C. Van; O’Malley, Ronald J.; Lekakh, Semen Naumovich; Chandrashekhara, K.

doi:10.1115/1.4042382

Cited by 20 publications

(6 citation statements)

References 22 publications

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“…To model the workpiece material response to the process, the Johnson-Cook plasticity and damage model was chosen for both cases [17]. Material constants for AISI 1018 steel were adopted from literature [18]. In the Lagrangian model, when an element reaches 100% damage, it is deleted from the simulation.…”

Section: Methodsmentioning

confidence: 99%

Study on the Applicability of Coupled Eulerian-Lagrangian Formulation in Abrasive Waterjet Machining Simulations

2019

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Non-conventional machining processes are considered as reliable alternatives to the established conventional ones in the case of processing of difficult-to-cut materials. Especially, Abrasive Waterjet Machining (AWJM) is advantageous for this purpose, as it can handle a wide range of workpiece materials and does not cause heat affected zones. In order to study the phenomena occurring during AWJM, numerical simulations should be carried out along with experiments. As machining processes involve significant material deformation, Coupled Eulerian-Lagrangian (CEL) Finite Elements (FE) models have been proven significantly accurate for this purpose, compared to pure Lagrangian models. Thus, in the present study it is attempted to compare the predicted results of CEL and pure Lagrangian models in the case of AWJM and determine whether this method is applicable for the process or not. Simulation cases based on experimental results are employed and discussion on the predicted cutting zone dimensions, stress and temperature field is conducted.

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Section: Methodsmentioning

confidence: 99%

Study on the Applicability of Coupled Eulerian-Lagrangian Formulation in Abrasive Waterjet Machining Simulations

2019

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“…The specimens were modelled as 3D-deformable models and impactor was modelled as discrete rigid model, Figures 5a. Similarly base and weld metal model in finite element analysis, Table 3 [20].…”

Section: Finite Element Analysismentioning

confidence: 99%

“…Similarly, the prepared model for weld metal, Figure 5b. The material properties assigned for carbon steel 1018 base and weld metal model in finite element analysis, Table 3 [20].…”

Section: Finite Element Analysismentioning

confidence: 99%

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Experimental and finite element analysis of Charpy impact, uniaxial tension and bending test of spin‐arc welded carbon steel 1018 plate

Sankarapandian,

Pramod,

Kumar

et al. 2023

Materialwissenschaft Werkst

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Spin‐arc welding process emerged as a continuation of gas metal arc or flux‐cored arc welding process, making use of filler wire and fuse plates of higher thickness with less welding defects. In this process, the filler wire is made to rotate along a central axis with a fixed diameter and frequency, thereby reducing the number of weld runs to join thick plates and resulting in increased productivity and less consumption of filler wire. American iron and steel institute carbon steel 1018 is a low carbon steel used primarily in rugged environments and is known for its excellent weldability and finds application in spacers, mounting plates, fixtures, carburized parts and machine parts. Present work aims to provide insight on experimental and finite element analysis of carbon steel 1018 (base and spin arc weld metal) specimens subjected to Charpy impact and uniaxial tension test. In order to verify the weld quality under bending load, a comparative study among experimental and finite element analysis of bending test is also performed. The finite element analysis results of Charpy impact, uniaxial tension and bending test are validated with experimental outcomes.

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“…n is hardening exponent, and m is thermal softening exponent. The material properties used for the steel are listed in Table 3 [31]. Table 3.…”

Section: Numerical Simulation Modelmentioning

confidence: 99%

Acceleration Characteristics of Discrete Fragments Generated from Explosively-Driven Cylindrical Metal Shells

Zhou

Wan

et al. 2020

Materials

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The acceleration characteristics of fragments generated from explosively-driven cylindrical shells are important issues in warhead design. However, there is as yet no reasonable theory for predicting the acceleration process of a specific metallic shell; existing approaches either ignore the effects of shell disintegration and the subsequent gas leakage on fragment acceleration or treat them in a simplified manner. In this paper, a theoretical model was established to study the acceleration of discrete fragments under the combined effect of shell disintegration and gas leakage. Firstly, an equation of motion was developed, where the acceleration of a cylindrical shell and the internal detonation gas was determined by the motive force impacting the inner surface of the metallic cylinder. To account for the force decrease induced by both the change in fragment area after the shell disintegrates and the subsequent drop in gas pressure due to gas leakage, the equation of motion was then associated with an equation for the locally isentropic expansion of the detonation gas and a modified gas-leakage equation. Finally, theoretical analysis was conducted by solving the associated differential equations. The proposed model showed good agreement with experimental data and numerical simulations, indicating that it was suitable for predicting the acceleration of discrete fragments generated from a disintegrated warhead shell. In addition, this study facilitated a better understanding of the complicated interaction between fragment acceleration and gas outflow.

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The Use of Genetic Algorithms to Calibrate Johnson–Cook Strength and Failure Parameters of AISI/SAE 1018 Steel

Cited by 20 publications

References 22 publications

Study on the Applicability of Coupled Eulerian-Lagrangian Formulation in Abrasive Waterjet Machining Simulations

Study on the Applicability of Coupled Eulerian-Lagrangian Formulation in Abrasive Waterjet Machining Simulations

Experimental and finite element analysis of Charpy impact, uniaxial tension and bending test of spin‐arc welded carbon steel 1018 plate

Acceleration Characteristics of Discrete Fragments Generated from Explosively-Driven Cylindrical Metal Shells

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