Effect of Combined Rolling Processes on Structure and Mechanical Properties of Pure Titanium Rods

2010 ◽  
Vol 667-669 ◽  
pp. 161-166 ◽  
Author(s):  
Nikolay Lopatin ◽  
Grigoriy Diakonov ◽  
Olga Pleshakova
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Microstructure Evolution ◽  
Strain State ◽  
Pure Titanium ◽  
Element Model ◽  
Warm Rolling ◽  
Shape Rolling ◽  
Commercially Pure ◽  
The Finite Element Model

This article focuses on the effect of combine rolling processes on structure and mechanical properties of the commercially pure Ti rods. The finite element model had being made. The analysis of strain state at the screw and shape rolling was done. The analysis of microstructure evolution at the warm rolling was completed.

Calculation of Cross Beam in Continuous Box Girder Bridge Based on Modified Shear Method

2014 ◽  
Vol 578-579 ◽  
pp. 642-647
Author(s):  
Ya Feng Gong ◽  
Xiao Bo Sun ◽  
Huan Li Wang ◽  
Hai Peng Bi
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Traditional Method ◽  
Element Model ◽  
Measured Data ◽  
Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Simplified Calculation ◽  
The Finite Element Model

The mechanical properties of cross beam in continuous box girder bridge can be obtained through analyzing the finite element model and measured data of bridge. A new simplified calculation method for cross beam is proposed in this paper, which is called modified shear method. Comparative analysis with traditional method is used to verify its feasibility and practicability.

Material Characteristic for Capability Analysis of Solid Tire by Finite Element Method

2018 ◽  
Vol 777 ◽  
pp. 416-420
Author(s):  
Juthanee Phromjan ◽  
Chakrit Suvanjumrat
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Element Model ◽  
Average Error ◽  
Element Analysis ◽  
Compression Load ◽  
Stress Strain Relation ◽  
The Finite Element Analysis ◽  
Capability Analysis ◽  
The Finite Element Model

The natural rubber compound of each layer of solid tire had determined the mechanical properties in tension. It was found that the stress-strain relation of each material tire layer was fitted very well with the Ogden constitutive model. The R2 which was 0.986, 0.996 and 0.985 represented the certain curve fitting on the internal, middle and tread layer of solid tire, respectively. Subsequently, the Ogden model was implemented in the finite element model of the rubber specimen and solid tire. The finite element analysis results obtained an average error of 18.00% and 14.63% for the specimen and solid tire model by comparing to the physical experiment, respectively. Particularly, the mechanical properties of the natural compounds could be used to predict the ultimate compression load for the solid tire failure.

The Research on the Microstructure Evolution Law of Cross Wedge Rolling Asymmetric Shaft-Parts Based on Parity Wedge

2012 ◽  
Vol 201-202 ◽  
pp. 1121-1125 ◽  
Author(s):  
Wen Wei Gong ◽  
Xue Dao Shu ◽  
Wen Fei Peng ◽  
Bao Shou Sun
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Microstructure Evolution ◽  
Theoretical Foundation ◽  
Effective Means ◽  
Element Model ◽  
Nonlinear Finite Element Method ◽  
Cross Wedge Rolling ◽  
Rigid Plastic ◽  
Simulation Calculation

Microstructure evolution is an effective means to improve the mechanical properties of products, shaft parts formed by cross wedge rolling is not only the shape of the formed parts, but more importantly it improves the comprehensive mechanical properties of the products by deformation. Therefore, the paper sets up the coupled rigid-plastic finite element model with deformation-heat transfer-microstructure by using nonlinear finite element method, and this model is adopted to make simulation calculation for the forming techniques of asymmetric shaft parts of cross wedge rolling based on parity wedge, specifically analyzes the rule of dynamic recrystallization and grain size distribution in the asymmetric rolled parts. The results show that the grain in the wedging place of asymmetric shaft parts of cross wedge rolling based on parity wedge can be obviously refined, and the research results of this paper may provide theoretical foundation for further improving the quality and mechanical properties of asymmetric shafts parts of cross wedge rolling.

Simulating the Mechanical Properties of a Yarn Based on the Properties and Arrangement of its Fibers Part I: The Finite Element Model

1997 ◽  
Vol 67 (4) ◽  
pp. 263-268 ◽  
Author(s):  
Lieva Van Langenhove
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Theoretical Model ◽  
Finite Elements ◽  
Finite Element Model ◽  
Tensile Strain ◽  
Virtual Work ◽  
Element Model ◽  
Dynamic Relaxation ◽  
The Finite Element Model

A theoretical model is established to predict stress-strain and torque-tensile strain curves of a yarn. The yarn is described by its properties and the arrangement of its fibers, which have a finite length. The yarn is transformed into finite elements. Equilibrium is expressed by virtual work, and is calculated iteratively using the dynamic relaxation technique. The principles of the model, its potential, limitations, and possible improvements are discussed.

Investigation of the Mechanical Properties of a Stitched Triaxial Fabric

2014 ◽  
Vol 611-612 ◽  
pp. 332-338 ◽  
Author(s):  
Cynthia J. Mitchell ◽  
James A. Sherwood ◽  
Lisa M. Dangora ◽  
Jennifer L. Gorczyca
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Material Behavior ◽  
Composite Forming ◽  
Experimental Deformation ◽  
Shear Frame ◽  
The Finite Element Model ◽  
The Ideal

A traxial fabric was investigated for use in composite forming applications. Three stitched layers of fibers, originally oriented at [-60o/0o/60o], comprise the fabric architecture. The mechanical properties of the material are characterized by testing the tensile, shear, and frictional behavior. Conventional shear frame testing methodology assumes that the yarns are originally oriented perpendicular to one another; however, such an assumption is not valid for this particular fabric geometry and must be adjusted. The material behavior is implemented into a discrete mesoscopic finite element model that can predict the response of the material during deformation. Different element types will be investigated to represent the fabric and used to determine the ideal mesh configuration that best captures the fabric behavior. Different modes of deformation will also be studied, and the observed experimental deformation will be compared to the deformation predicted by the finite element model.

scholarly journals ANALYSIS OF FEATURES OF APPLIED SOFTWARE “LIRA” IN CALCULATIONS OF NON-CIRCULAR TUNNEL LININGS

2019 ◽  
pp. 41-50
Author(s):  
V. P. KUPRIY ◽  
O. L. TIUTKIN ◽  
P. YE. ZAKHARCHENKO
Keyword(s):  
Finite Element ◽  
Numerical Analysis ◽  
Finite Element Model ◽  
Software Package ◽  
Strain State ◽  
Element Model ◽  
Finite Element Models ◽  
Stress Strain ◽  
Stress Strain State ◽  
The Finite Element Model

Purpose. The article examines the effect on the stress-strain state of the parameters of the finite-element model created in the “Lira” software package in a numerical analysis of non-circular outlined tunnels. Methodology To achieve this goal, the authors developed finite element models of the calotte part of the mine during the construction of a double track railway tunnel using “Lira” software. In each of the models in the “Lira” software package, the interaction zone with temporary fastening was sampled in a specific way. After creation of models, their numerical analysis with the detailed research of his results was conducted. Findings. In the finite element models, the values of deformations and stresses in the horizontal and vertical axes, as well as the maximum values of the moments and longitudinal forces in the temporary fastening were obtained. A comparative analysis of the obtained values of the components of the stress-strain state with a change in the parameters of the finite element model was carried out. The graphs of the laws of these results from the discretization features of the two models were plotted. The third finite element model with a radial meshing in the zone of interaction of temporary support with the surrounding soil massif was investigated. Originality It has been established that in the numerical analysis of the SSS of a tunnel lining of a non-circular outline, its results substantially depend on the shape, size and configuration of the applied finite elements, on the size of the computational area of the soil massif, and also on the conditions for taking into account the actual (elastic or plastic) behavior of the soil massif.  Practical value. The features of discretization and the required dimensions of the computational area of the soil massif were determined when modeling the “lining – soil massif” system, which provide sufficient accuracy for calculating the parameters of the stress-strain state of the lining.

scholarly journals Finite Element Analysis of Anchor Leg Improved Trough Embedded Parts Based on ABAQUS

2019 ◽  
Vol 79 ◽  
pp. 01010
Author(s):  
Xin Huang ◽  
Yunfan Gu ◽  
Baocun Shi ◽  
Xin Chen ◽  
Wei Jiang
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Circular Hole ◽  
Shear Failure ◽  
Element Model ◽  
Ultimate Stress ◽  
Element Analysis ◽  
Anchor Plates ◽  
The Finite Element Model

Reasonable and accurate simulations of failure behaviors of steel-concrete composite members with trough embedded parts is of great significance for the study of joint failure mechanism of prefabricated components in assembled buildings. Based on the implicit solution module of ABAQUS, the anchor legs of 5234 trough embedded parts are redesigned. The cylindrical anchor legs are designed as anchor plates with different diameter holes. The finite element model of the anchor leg of improved 5234 trough embedded parts and that of concrete are established. The mechanical properties of the specimens under bending and shear failure are simulated. And take a research on the improved trough embedded parts. The results show that the ultimate stress of concrete and the ultimate stress of embedded parts decrease first, then increase and then decrease with the increase of the diameter of circular hole, and the displacement of anchor leg of embedded parts decreases first and then increases with the increase of the diameter of circular hole. When the diameter of circular hole is 10.0 mm, the ultimate stress of concrete, the ultimate stress of embedded parts and the displacement of anchor leg are the smallest, and the mechanical properties of embedded parts are improved the most.

Mechanical Properties and Parameters Optimization of Large-scale Bearing by Finite Element Simulation

2019 ◽  
Vol 11 (4) ◽  
Author(s):  
Zhihua Zhang
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Large Scale ◽  
Roller Bearing ◽  
Element Model ◽  
Parameters Optimization ◽  
Channel Spacing ◽  
Element Simulation ◽  
Load Carrying ◽  
The Finite Element Model

The structure of large-scale roller bearing has strong load carrying capacity, so it is often used in the system of low-speed operation. In wind power technology, large-scale bearings are used and its reliability is very important. In this paper, the characteristics of two kinds of bearing structures are analysed and then the finite element model is used to simulate the large-scale roller bearing with the load distribution and size of contact angle under actual working conditions. By constructing several large-scale roller bearing support models, the influence of its structure and hardness on its mechanical properties can be established. Finally, the parameters optimization is carried out for channel spacing, to find the most suitable value between the two channels to improve the service life of roller bearings.

Modeling Material-Degradation-Induced Elastic Property of Tissue Engineering Scaffolds

2010 ◽  
Vol 132 (11) ◽  
Author(s):  
N. K. Bawolin ◽  
M. G. Li ◽  
X. B. Chen ◽  
W. J. Zhang
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Molecular Weight ◽  
Finite Element ◽  
Finite Element Model ◽  
Model Updating ◽  
Element Model ◽  
Time Dependent ◽  
Tissue Engineering Scaffolds ◽  
The Finite Element Model

The mechanical properties of tissue engineering scaffolds play a critical role in the success of repairing damaged tissues/organs. Determining the mechanical properties has proven to be a challenging task as these properties are not constant but depend upon time as the scaffold degrades. In this study, the modeling of the time-dependent mechanical properties of a scaffold is performed based on the concept of finite element model updating. This modeling approach contains three steps: (1) development of a finite element model for the effective mechanical properties of the scaffold, (2) parametrizing the finite element model by selecting parameters associated with the scaffold microstructure and/or material properties, which vary with scaffold degradation, and (3) identifying selected parameters as functions of time based on measurements from the tests on the scaffold mechanical properties as they degrade. To validate the developed model, scaffolds were made from the biocompatible polymer polycaprolactone (PCL) mixed with hydroxylapatite (HA) nanoparticles and their mechanical properties were examined in terms of the Young modulus. Based on the bulk degradation exhibited by the PCL/HA scaffold, the molecular weight was selected for model updating. With the identified molecular weight, the finite element model developed was effective for predicting the time-dependent mechanical properties of PCL/HA scaffolds during degradation.

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