A fully coupled material constitutive model for steel quench analysis

2010 ◽  
Vol 5 (6) ◽  
pp. 501
Author(s):  
Xin Yao ◽  
Lihua Zhu ◽  
M. Victor Li
Keyword(s):  
Constitutive Model ◽  
Material Constitutive Model ◽  
Fully Coupled ◽  
Quench Analysis

An Alternative Technique to Evaluate Crack Propagation Path in Hyperelastic Materials

2012 ◽  
Vol 40 (1) ◽  
pp. 42-58 ◽  
Author(s):  
R. R. M. Ozelo ◽  
P. Sollero ◽  
A. L. A. Costa
Keyword(s):  
Constitutive Model ◽  
Crack Propagation ◽  
Experimental Tests ◽  
Growth Direction ◽  
Propagation Path ◽  
J Integral ◽  
Alternative Technique ◽  
Crack Propagation Path ◽  
Hyperelastic Materials ◽  
Material Constitutive Model

Abstract REFERENCE: R. R. M. Ozelo, P. Sollero, and A. L. A. Costa, “An Alternative Technique to Evaluate Crack Propagation Path in Hyperelastic Materials,” Tire Science and Technology, TSTCA, Vol. 40, No. 1, January–March 2012, pp. 42–58. ABSTRACT: The analysis of crack propagation in tires aims to provide safety and reliable life prediction. Tire materials are usually nonlinear and present a hyperelastic behavior. Therefore, the use of nonlinear fracture mechanics theory and a hyperelastic material constitutive model are necessary. The material constitutive model used in this work is the Mooney–Rivlin. There are many techniques available to evaluate the crack propagation path in linear elastic materials and estimate the growth direction. However, most of these techniques are not applicable to hyperelastic materials. This paper presents an alternative technique for modeling crack propagation in hyperelastic materials, based in the J-Integral, to evaluate the crack path. The J-Integral is an energy-based parameter and is applicable to nonlinear materials. The technique was applied using abaqus software and compared to experimental tests.

scholarly journals Research on TANH Material Constitutive Model Based on Analytical Method

2020 ◽  
Vol 56 (9) ◽  
pp. 252
Author(s):  
HAO Xiaole ◽  
YUE Caixu ◽  
CHEN Zhitao ◽  
LIU Xianli ◽  
LIANGS Y ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Analytical Method ◽  
Material Constitutive Model ◽  
Model Based

A Unified Macro- and Micromechanics Constitutive Model of Fully Coupled Fields

2014 ◽  
Vol 50 (2) ◽  
pp. 233-244 ◽  
Author(s):  
Z. Sun ◽  
X. Niu ◽  
Sh. Huang ◽  
Y. Song
Keyword(s):  
Constitutive Model ◽  
Coupled Fields ◽  
Fully Coupled

Significance of material constitutive model and forming parameters on the crashworthiness performance of capped cylindrical tubular structures

2019 ◽  
Vol 234 (2) ◽  
pp. 320-334
Author(s):  
Praveen Kumar A ◽  
Afdhal Akbar ◽  
Annisa Jusuf ◽  
Leonardo Gunawan
Keyword(s):  
Finite Element ◽  
Constitutive Model ◽  
Performance Indicators ◽  
Thickness Distribution ◽  
Material Constitutive Model ◽  
Numerical Predictions ◽  
Forming Parameters ◽  
Crushing Force ◽  
Cylindrical Tubes ◽  
Energy Absorbing

An accuracy of crushing performance indicators is critical to evaluate in finite element crushing simulations particularly for the press-formed capped tubular energy absorbing structures. It is essential to select the appropriate material constitutive model and to incorporate the forming parameters into the finite element crushing model as a vital input. Hence in the present article, the influence of various material constitutive models and forming (multi-stage deep drawing) parameters on the axial crashworthiness characteristics of thin-walled capped cylindrical tubes were investigated numerically. Both forming and crushing simulations were executed by nonlinear finite element LS-DYNA® code. The forming parameters such as thickness distribution, residual stress, and effective plastic strain were mapped to a finite element crushing model of the tube. The numerical predictions of the thickness distribution and final deformed profiles of the capped cylindrical tubes are correlated with the experiments. The results revealed that the forming parameters have a substantial effect on the crushing performance of the deep drawn capped cylindrical tubes. As a result of these analyses, the thickness and strain predictions strengthens the tube and significantly influenced the crushing performance indicators such as initial peak crushing force, mean crushing force, and the energy absorbing capacity.

Constitutive Model of Supper-Alloy IN625 Based on Extrusion Test

2011 ◽  
Vol 314-316 ◽  
pp. 819-822 ◽  
Author(s):  
Zhong Tang Wang ◽  
Shi Hong Zhang ◽  
Ming Cheng ◽  
De Fu Li
Keyword(s):  
Constitutive Model ◽  
Strain Rate ◽  
Test Data ◽  
Arrhenius Equation ◽  
New Method ◽  
Extrusion Speed ◽  
Material Constitutive Model ◽  
Model Based ◽  
Calculation Results ◽  
Relative Errors

Abstract: It had been put forward that a new method to establish material constitutive model based on extrusion test, which was that the material constitutive model was determined with the Arrhenius equation according to the extrusion test data. The tube extruding test of supper-alloy Inconel625(IN625) had been done on 16300kN extrusion machine. According to the extrusion test data and the Arrhenius equation, it had been determined that the constitutive model of supper-alloy IN625 based on extrusion test, and the relative errors between calculation results of the model and experiment results are less than 7.8%. The suitable conditions of the constitutive model of supper-alloy IN625 are that the temperature being 1150°C～1200°C, and extrusion speed being 15～60mm/s, and strain-rate being 1.86～7.44.

Research on Deformation Mechanism of Cutting Nickel-Based Superalloy Inconel718 Based on Strain Gradient Theory

2021 ◽  
pp. 1-16
Author(s):  
ZhaoPeng Hao ◽  
JiNing Li ◽  
YiHang Fan
Keyword(s):  
Constitutive Model ◽  
Simulation Model ◽  
Scale Effect ◽  
Strain Gradient ◽  
Cutting Process ◽  
Machining Process ◽  
Strain Gradient Theory ◽  
Gradient Theory ◽  
Material Constitutive Model ◽  
Cutting Model

Abstract The traditional material constitutive model can effectively simulate the mechanical properties during the cutting process. However,the scale characteristics contained in materials are not considered in traditional cutting model, and the inherent scale effect of materials are also ignored. Therefore, the traditional cutting constitutive model cannot effectively reflect the size effect in cutting process, and then cannot obtain the accurate stress, strain and temperature. In this present paper, a material constitutive model which can reflect the scale effect is established based on the strain gradient plasticity theory. Through the established model and secondary development of ABAQUS, the two-dimensional dynamic Finite Element Simulation model of cutting Inconel 718 is established. By comparing the cutting experiment results with the simulation results, the established simulation model can more accurately reflect the effects of temperature, strain gradient effect, equivalent stress and its scale effect on cutting deformation during the machining process.

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