Evaluation of the Relation Between Preload Values and Pullout Force of the Cortical Screw Used in Bone Fracture

2021 ◽  
Author(s):  
Talip Celik
Keyword(s):  
Finite Element Method ◽  
Bone Fracture ◽  
Fracture Fixation ◽  
Material Properties ◽  
Orthotropic Material ◽  
Research Question ◽  
The Finite Element Method ◽  
Pullout Strength ◽  
Pullout Force ◽  
Cortical Screw

Abstract This study aims to examine the relation between pullout strength and preload values of the cortical screw used in bone fracture fixation. The research question is that "Does the pullout strength of the cortical screw used in the bone fracture fixation change with the preload values of the screw change?". To perform this purpose, the finite element method was selected due to its ease to evaluate and calculate the stresses on the whole model. Models of a cortical screw, partial plate and bone were created using the SolidWorks program. The material properties of the bone were selected orthotropic material type. The bone fixed on the distal and proximal ends. The pullout forces were applied at the bottom of the plate. The screw has been loaded ranges from 100 N - 700 N as preload. The pullout forces were determined 200-400-600 N as in the literature. The results show that the pullout strength of the screw was changed when the preloaded values higher than 400 N. However, it was seen that the pullout strength does not substantially change when the preload values were lower than 400 N. In conclusion, the pullout strength of the screw altered when the preload values of the screw was changed.

The Numerical Simulation of Effective Elastic Response for WC-Co Cemented Carbide

2015 ◽  
Vol 1096 ◽  
pp. 417-421
Author(s):  
Pei Luan Li ◽  
Zi Qian Huang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Theoretical Model ◽  
Material Properties ◽  
Cemented Carbide ◽  
Elastic Response ◽  
The Finite Element Method ◽  
Simulation Results ◽  
Element Method

By the use of finite element method, this paper predicts the effects of the shapes of reinforcements with different ductility (Co) on the effective elastic response for WC-Co cemented carbide. This paper conducts a comparative study on the material properties obtained through theoretical model, numerical simulation and experimental observations. Simulation results indicate that the finite element method is more sophisticated than the theoretical prediction.

Evolution of Matt Surface Topography in Aluminium Pack Rolling

2005 ◽  
Author(s):  
Hiroshi Utsunomiya ◽  
Michael P. F. Sutcliffe ◽  
Hugh R. Shercliff ◽  
Pete S. Bate ◽  
Dan B. Miller
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Surface Topography ◽  
Material Properties ◽  
Quantitative Agreement ◽  
Aluminium Foil ◽  
The Finite Element Method ◽  
Good Quantitative Agreement ◽  
Pack Rolling ◽  
Element Method

Roughening of the matt surface of pack rolled aluminium foil has been modelled. The model is based on the finite element method using isotropic plasticity. A distribution in material properties has been used to simulate the distribution of orientations through the material. The predictions of roughness show good quantitative agreement with the experiments.

scholarly journals Finite element analysis of complete model of cervical spine

2021 ◽  
Author(s):  
Muhammad Ardalani-Farsa
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Cervical Spine ◽  
Material Properties ◽  
The Finite Element Method ◽  
Complete Model ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Hard Tissues

The finite element method has been applied in the area of the cervical spine since the 1970's. In the present research work, the finite element method was employed to model, validate and analyze a complete model of the human cervical spine from C1 to T1, including interconnecting intervertebral discs, ligaments and joints. The developed model of the cervical spine was validated by the experimental results presented in the literature. As the values obtained from the finite element analysis were mainly in the range of motion observed in the experiment; it was concluded that the finite element results were consistent with the reported data in the literature. Next, the validated model of the cervical spine was examined under physiological loading modes to locate the areas bearing maximum stress in the cervical spine. Finally, to study the effect of variations in the material properties on the output of the finite element analysis, a material property sensitivity study was conducted to the C3-T1 model of cervical spine. Changes in the material properties of the soft tissues affected the external and internal responses of both the hard and soft tissue components, while changes in those of the hard tissues only affected the internal response of hard tissues.

scholarly journals Sensitivity of Composite Structure with Directional Properties of Annular Three-Layered Plate Mechanically and Thermally Loaded

2020 ◽  
Vol 22 (3) ◽  
pp. 691-702
Author(s):  
Dorota Pawlus
Keyword(s):  
Finite Element Method ◽  
Material Properties ◽  
Radial Direction ◽  
Layered Plate ◽  
The Finite Element Method ◽  
Critical Temperatures ◽  
Buckling Modes ◽  
Numerical Investigations ◽  
Plate Structure ◽  
Annular Plates

AbstractPaper presents the sensitivity of the three-layered plate structure on the acting of mechanical and thermal loads. The cases of the annular plates, whose individual layers: facings and core have homogeneous building and/or heterogeneous one expressed by the variable material properties in radial direction have been examined. Numerical investigations have been carried out modelling the select examples of plate structure with the use of the finite element method. Plate is loaded in the plane of facings or is subjected to the flat temperature field. The evaluation of the structure sensitivity has been carried out analysing the values of critical loads or critical temperatures and corresponding with them buckling modes. Numerous results presented in diagrams create the image of plate behaviours, show responses of plate structure and indicate on the means of structure designs, which can fulfil the expected conditions of plate work.

Engineering Calculations of Microelectronic Products Parts and Assemblies Using Finite-Element Modeling

2021 ◽  
Vol 26 (3-4) ◽  
pp. 255-264
Author(s):  
E.Y. Chugunov ◽  
◽  
A.I. Pogalov ◽  
S.P. Timoshenkov ◽  
◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Material Properties ◽  
Integrated Approach ◽  
Design And Technology ◽  
Design Parameters ◽  
The Finite Element Method ◽  
Operational Factors ◽  
The Impact ◽  
Element Method

In the context of increasing the electronic components integration level, growing functionality and packaging density, as well as reducing the electronics weight and size, an integrated approach to engineering calculations of parts and assemblies of modern functionally and technically complex microelectronic products is required. Of particular importance are engineering calculations and structural modeling using computer-aided engineering systems, and also assessment of structural, technological and operational factors’ impact on the products reliability and performance. This work presents an approach to engineering calculations and microelectronic products modeling based on the finite-element method providing a comprehensive account of various factors (material properties, external loading, temperature fields, and other parameters) impact on the stress-strain state, mechanical strength, thermal condition, and other characteristics of products. On the example of parts and assemblies of products of microelectronic technology, the approximation of structures was shown and computer finite-element models were developed to study various structural and technological options of products and the effects on them. Engineering calculations and modeling of parts and assemblies were performed, taking into account the impact of material properties, design parameters and external influences on the products’ characteristics. Scientific and technical recommendations for structure optimization and design and technology solutions ensuring the products resistance to diverse effects were developed. It has been shown that an integrated approach to engineering calculations and microelectronic products modeling based on the finite-element method provides for the determination of optimal solutions taking into account structural, technological, and operational factors and allows the development of products with high tactical, technical and operational characteristics.

Evaluation of J Integral for Interacting Twin Collinear Through-Wall Cracks in a Plate under Tension

2015 ◽  
Vol 665 ◽  
pp. 97-100 ◽  
Author(s):  
Marko Katinic ◽  
Drazan Kozak ◽  
Ivan Samardzic ◽  
Antun Stoic ◽  
Zeljko Ivandic ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Material Properties ◽  
Strain Hardening Exponent ◽  
Fracture Parameter ◽  
The Finite Element Method ◽  
Single Crack ◽  
Elastic Plastic ◽  
Linear Elastic ◽  
Interaction Factor

The interaction behavior of twin collinear through-wall cracks in tension loaded plate under elastic-plastic condition is investigated by the finite element method (FEM). The fracture parameter J integral for interacting cracks is calculated and compared to the J integral for a single crack the same size. In this way, the interaction factor of cracks under elastic-plastic condition is defined. This interaction factor is compared to the results of analytical solution of the interaction factor under linear elastic condition. The results show that interaction factor of cracks under elastic-plastic condition is higher than interaction factor of same cracks under linear elastic condition. Also the interaction effect of cracks under elastic-plastic condition is influenced not only by the crack configurations but also by the material properties, especially the strain hardening exponent n.

Passivated Interconnect Lines: Thermomechanical Analysis and Curvature Measurements

1999 ◽  
Vol 594 ◽  
Author(s):  
A. Wikström ◽  
P. Gudmundson ◽  
S. Suresh
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Material Properties ◽  
Thermomechanical Analysis ◽  
The Finite Element Method ◽  
Curvature Measurements ◽  
Interconnect Lines ◽  
Element Method

AbstractIt is well known that curvature measurements may be used to obtain volume averaged stresses in thin continuous films and unpassivated lines without knowledge of the material properties of the film or lines. However, recently a method was presented which makes it possible to use curvature measurements also for the determination of volume averaged stresses in passivated lines. Since the problem is statically indeterminate the method requires knowledge of the material properties of the lines and passivation. The sensitivity of the method to uncertainties in material properties and curvature data is here investigated by utilizing the finite element method for anisotropic Cu or Al lines embedded in SiO2 passivation. Furthermore, the method is extended to cover the case of different stress-free temperatures for the lines and passivation respectively.

The Optimum Design of A2JK Hoist Drum Based on ANSYS

2011 ◽  
Vol 299-300 ◽  
pp. 1028-1031
Author(s):  
Shuang Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Distribution ◽  
Optimum Design ◽  
Material Properties ◽  
Solid Model ◽  
Finite Element Method Analysis ◽  
The Finite Element Method ◽  
Concrete Condition ◽  
Method Analysis

The hoist drum was analyzed with the finite element method analysis in this article .First, some necessary simplifications of hoist drum were handled and the solid model of reel was made by using of Pro / E. According to the concrete condition, we established material properties, generated the meshing and loads applied as well as other imposed constraints on the rolls based on ANSYS, and finally the hoist drum deformation and stress was solved. By analyzing the results, strain and stress distribution rolls are obtained.

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