Results 221 to 230 of about 26,638 (258)

Cost-Effectiveness of Pantoprazole to Prevent Upper Gastrointestinal Bleeding in Mechanically Ventilated Patients.

JAMA Netw Open
Xie F, Yao Y, Ma Y, Humphries B, Lau VI, Fowler R, Rochwerg B, Heels-Ansdell D, Zytaruk N, Barletta JF, Kanji S, Arabi YM, Johnson DW, Williamson D, Marshall JC, Deane A, Myburgh J, Geagea A, Poole A, Archambault P, Khwaja K, Ostermann M, Burry L, Guyatt GH, Cook DJ, E-REVISE Collaborators and the Canadian Critical Care Trials Group.   +25 more
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Determination of Johnson–Cook parameters from machining simulations

Computational Materials Science, 2012
Abstract The plastic behaviour of material can be described using parametric material models such as the Johnson–Cook model. The parameters for such models are identified from experimentally determined flow curves by curve fitting techniques. In high speed machining processes, one encounters strains of more than 200% and strain rates of the order of ...
Martin Baker
exaly   +2 more sources

A comparative study on Johnson-Cook and modified Johnson-Cook constitutive material model to predict the dynamic behavior laser additive manufacturing FeCr alloy

Journal of Alloys and Compounds, 2017
Abstract An accurate prediction of flow behavior of metals considering the combined effects of strain, strain rate and temperature is essential for understanding flow response of metals, and a key requirement for numerical modeling and simulation of machining. Thus, the effects of high strain rate and elevated temperature on the deformation behaviors
Yanhua Zhao, Jie Sun, Jianfeng Li, Yuqin Yan, Ping Wang   +4 more
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A review on Johnson Cook material model

Materials Today: Proceedings, 2022
Krishna Mohan Buddaraju
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A REVISED FORM FOR THE JOHNSON–COOK STRENGTH MODEL

International Journal of Impact Engineering, 1998
Abstract Strength models play a key role in the numerical simulation of impact events. A revised form of the Johnson–Cook strength model is proposed in this paper. The revised model treats the sudden strengthening that many ductile metals exhibit at strain rates greater than 104/s.
WILLIAM K. RULE, S.E. Jones
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Constitutive modelling of Al7075 using the Johnson–Cook model

Bulletin of Materials Science, 2019
In this paper, hot compression behaviour of Al7075 in the temperature range of 573–723 K and the strain rate range of 0.001–0.1 $$\hbox {s}^{-1}$$ , based on standard requirements, was studied.
Sajad Rasaee, A H Mirzaei, D Almasi
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Numerical solution of shear localization in Johnson–Cook materials

Mechanics of Materials, 2003
Abstract To compute shear localization, a recently developed numerical scheme is adapted for application to certain types of materials described by a Johnson–Cook model. In the context of a slab geometry, the numerical scheme requires discretization only in the time variable to yield the stress and temperature in a shear band.
J.A. DiLellio, W.E. Olmstead
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Determination of Johnson-Cook constitutive equation for Inconel 601

Journal of Mechanical Science and Technology, 2018
Due to their superior thermal and mechanical properties, super alloys widely used in the aerospace industry have been well-documented in terms of AdvantEdge-based analysis of cutting characteristics rather than experimental methods. However, the well-known super alloy Inconel 601 does not have any database of its material properties in AdvantEdge ...
Ki Beom Park, Young Tae Cho, Yoon Gyo Jung   +2 more
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Study on Calibration for Parameters of Johnson-Cook Constitutive Equation

Advanced Materials Research, 2011
Procedure of determination for parameters of Johnson-Cook model, which is widely used in numerical computation and design for manufacture process, is made. The paper describes fundamental investigation of Johnson-Cook constitutive equation firstly, then quasi-static compression experiment MTS is reviewed briefly, and dynamic compression experiment SHPB
Jian Guang Li, Jie Dong Cao
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Determination of Johnson-Cook material model for weldment of mild steel

Materials Today: Proceedings, 2020
Abstract The material behavior of mild steel is determined after the material experiences weld induced heating effect. The mild steel, when subjected to high-speed large deformation, is subjected to high temperatures and strain rate. The material behavior is modeled using the Johnson-Cook (JC) model to incorporate the effect of strain, strain rate ...
Sandeep Yadav, Sorabh Singhal, Yogeshwar Jasra, Ravindra K. Saxena   +3 more
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