scholarly journals Comparison of Hyperelastic Models for Rubber-Like Materials

2006 ◽  
Vol 79 (5) ◽  
pp. 835-858 ◽  
Author(s):  
G. Marckmann ◽  
E. Verron
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Constitutive Equations ◽  
Loading Conditions ◽  
Material Parameters ◽  
Fitting Procedure ◽  
Element Simulation ◽  
Different Types ◽  
Hyperelastic Models

Abstract The present paper proposes a thorough comparison of twenty hyperelastic models for rubber-like materials. The ability of these models to reproduce different types of loading conditions is analyzed thanks to two classical sets of experimental data. Both material parameters and the stretch range of validity of each model are determined by an efficient fitting procedure. Then, a ranking of these twenty models is established, highlighting new efficient constitutive equations that could advantageously replace well-known models, which are widely used by engineers for finite element simulation of rubber parts.

Numerical simulation of ductile fracture in polyethylene pipe with continuum damage mechanics and Gurson-Tvergaard-Needleman damage models

2019 ◽  
Vol 233 (12) ◽  
pp. 2455-2468
Author(s):  
Yi Zhang ◽  
P-Y Ben Jar ◽  
Shifeng Xue ◽  
Lin Li
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Constitutive Equations ◽  
Damage Evolution ◽  
Damage Mechanics ◽  
Experimental Testing ◽  
Monotonic Loading ◽  
Test Method ◽  
Strain Level ◽  
Element Simulation

A phenomenon-based hybrid approach of experimental testing and finite element simulations is used to describe the fracture behavior of pipe-grade polyethylene. The experimental testing adopts a modified D-split test method to stretch the pipe ring (notched pipe ring) specimens that have symmetric, double-edged flat notches along the pipe direction. Two series of experimental testing were conducted: (1) monotonic loading till fracture and (2) monotonic loading to a predefined strain level, keeping constant displacement for a period of time, and then unloaded. Crosshead speeds of 0.01, 1, and 100 mm/min were used in both series of tests. Likewise, two series of finite element simulation were conducted to establish the constitutive equations, either with or without considering damage evolution during the deformation process. The constitutive equation without the consideration of damage was established using results from the first series of experimental testing, and that with damage was inspired from the second series which showed the decrease in unloading modulus with the increase of crosshead speed or the predefined strain level. The results show that with the consideration of damage evolution, the constitutive equations enable the finite element simulation to determine the whole stress–strain relationship during both necking and fracture processes.

Finite Element Simulation of RC Beam Strengthened with FRP

2012 ◽  
Vol 446-449 ◽  
pp. 3229-3232
Author(s):  
Chao Jiang Fu
Keyword(s):  
Experimental Data ◽  
Finite Element Method ◽  
Finite Element ◽  
Numerical Analysis ◽  
Finite Element Simulation ◽  
Fiber Reinforced Polymer ◽  
Rc Beam ◽  
The Finite Element Method ◽  
Reinforced Polymer ◽  
Element Simulation

The finite element modeling is established for reinforced concrete(RC) beam reinforced with fiber reinforced polymer (FRP) using the serial/parallel mixing theory. The mixture algorithm of serial/parallel rule is studied based on the finite element method. The results obtained from the finite element simulation are compared with the experimental data. The comparisons are made for load-deflection curves at mid-span. The numerical analysis results agree well with the experimental results. Numerical results indicate that the proposed procedure is validity.

Microstructures Finite Element Simulation of Laser Cladding Layer Regulated by Micro-Forging

2011 ◽  
Vol 328-330 ◽  
pp. 1568-1571 ◽  
Author(s):  
Ju Zhou ◽  
Chang Jun Qiu ◽  
Xi Yang Cheng
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Laser Cladding ◽  
Avrami Equation ◽  
Cladding Layer ◽  
Whole Process ◽  
Element Simulation ◽  
Calculation Results ◽  
Set Up

In the whole process of micro-forging regulation laser cladding layer, the microstructure structure of cladding layer would change. In order to establish the microstructure evolution of the whole process, firstly re-crystallization model was set up based on Avrami equation and experimental data, and various material constants were gained with regress; secondly calculation for the model was carried out on DEFORM-2D,then the results were compared with experimental data, which showed that calculation results of this model kept good consistency with experimental data, and proved that the model could be applied in a full size finite element simulation of the micro forging process.

Effect of Indenter Geometries on Material Properties: A Finite Element Simulation

2011 ◽  
Vol 70 ◽  
pp. 219-224 ◽  
Author(s):  
J.J. Kang ◽  
A.A. Becker ◽  
W. Sun
Keyword(s):  
Finite Element ◽  
Elastic Modulus ◽  
Finite Element Simulation ◽  
Material Properties ◽  
Plastic Strains ◽  
Fe Simulations ◽  
Element Simulation ◽  
Different Types ◽  
Indentation Tests

In this study, numerical indentation tests are carried out to examine the sensitivity of FE solutions with respect to different types of substrate models. Axisymmetric, 3D-quarter and 3D-half geometry substrates with a perfectly sharp indenter are modelled. Numerical evaluations of three different indenters, namely Berkovich, Vickers and conical indenters with perfectly sharp tips are investigated. From the FE simulations, the loading-unloading curves can be obtained. From the slope of the unloading curve, the hardness and elastic modulus can be calculated by using the Oliver-Pharr method. The results are compared to investigate the effects of using different indenter geometries. The equivalent plastic strains and the effects of different face angles of the indenters are analysed.

FINITE ELEMENT SIMULATION OF A NANO-SCRATCH TEST OF BONE

2009 ◽  
Vol 09 (03) ◽  
pp. 427-435
Author(s):  
SATYA PRASAD PARUCHURU ◽  
XIAODU WANG
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Bone Tissue ◽  
Age Groups ◽  
Element Model ◽  
Scratch Test ◽  
Bone Properties ◽  
Element Simulation ◽  
Energy Dissipated

Quality of bone tissue deteriorates with age and disease. Mechanical techniques that evaluate properties of cadaver bone help in understanding mechanisms behind aging and disease and by extension in the quality assurance of engineered bone tissue. Use of inverse engineering methods help in interpreting bone properties from experimental data. Correlation of these properties to noninvasive or minimally invasive measurements aids in assessment of the quality and fracture risk of live bone tissue. A pilot study on different age groups has shown that the removal energy dissipated per volume during the scratch may be a representative of the toughness of bone. A 3D finite element model was proposed to perform numerical simulation of bone scratch tests in order to aid in formulation of a quantitative scratch approach and assessment of in-situ properties by inverse engineering methods. Finite element modeling procedures for simulation of bone scratch test were developed. Simulation of scratch test was carried out using contact analysis. The results of finite element simulation were compared with experimental data. The simulation gave a preliminary understanding of deformation produced in the bone scratch test.

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