Estimation of Elongational Viscosity Using Entrance Flow Simulation

2000 ◽  
Author(s):  
Debabrata Sarkar ◽  
Mahesh Gupta
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Shear Viscosity ◽  
Flow Simulation ◽  
Elongational Viscosity ◽  
Viscosity Model ◽  
Capillary Rheometer ◽  
Element Simulation ◽  
Entrance Pressure ◽  
Entrance Pressure Loss

Abstract A new elongational viscosity model along with the Carreau-Yasuda model for shear viscosity is used for a finite element simulation of the flow in a capillary rheometer die. The entrance pressure loss predicted by the finite element flow simulation is matched with the corresponding experimental data to predict the parameters in the new elongational viscosity model. For two different polymers, the predicted elongational viscosity is compared with the corresponding predictions from Cogswell’s analysis and K-BKZ model.

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.

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.

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.

scholarly journals Numerical Modeling Rolling Contact Problem and Elasticity Deformation of Rolling Die under Hot Milling

2018 ◽  
Author(s):  
Mesay Alemu Tolcha ◽  
Holm Altenbach
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Contact Region ◽  
Tangential Force ◽  
Laws Of Nature ◽  
Continuum Theory ◽  
Rolling Contact ◽  
Element Simulation ◽  
World Industry

In the world industry plant, solid and solid metals are always in contact even their motions not independent. Modeling of rolling die contact with slab primarily needs to describe the Tribology of contact phenomena. Consideration of continuum theory of rolling contact how a contact region is formed between rolling die and slab, and how the tangential force is distributed over the contact area with coefficient of friction is important. The central concern of numerical model is used in this work to indicate a set of equations, derived from the contact principle, that transfer the physical event into the mathematical equations including the laws of nature, such as newton’s laws, boundary conditions, state of stresses and their derivatives at particular time and locations. In this paper the elasticity stress behavior of rolling die contact with slab for number of cyclic loads is modeled. The model is including new proposed constitutive equations for discontinuity of the velocity, pressure distribution in rolling contact from the enter side to exit side of the neutral point. To verify the model, finite element simulation and experimental data from the literature are considered. The results show good agreement with finite element simulation and experimental data.

Finite Element Simulation of the Self-Piercing Riveting Process

2008 ◽  
Author(s):  
S. G. Qu ◽  
W. J. Deng
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Process Simulation ◽  
Metal Flow ◽  
The Self ◽  
Finite Element Code ◽  
The Finite Element Method ◽  
Element Simulation ◽  
Riveting Process ◽  
Good Agreement

This work is focused on the development of a numerical model with the help of the finite element method to predict the magnitude and distribution of deformation associated with the self-piercing riveting process. A 2D axisymmetric model of the self-piercing riveting process is presented using the commercial implicit finite element code MSC.Superform. The flow stress of the work-material is taken as a function of strain, strain-rate and temperature. The shape of the rivet joint and the stress, strain and damage in both of the rivet and workpiece sheets are determined. The information obtained from the process simulation, such as force, metal flow and details of die fill are discussed. The calculated punching forces and the shape of the rivet joint are compared with experimental data and found to be in good agreement. Defects in the riveting are analyzed and are categorized into penetration, necking and lap formation. The effects of workpiece temperature on punching force were also discussed.

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