scholarly journals Accident Reconstruction of Damaged Human Body Using MDCT and Computer Numerical Analysis

2020 ◽  
Vol 10 (9) ◽  
pp. 3059
Author(s):  
Eui Soo Kim
Keyword(s):  
Finite Element ◽  
Human Body ◽  
Systematic Investigation ◽  
Accident Reconstruction ◽  
The Finite Element Method ◽  
Finite Element Program ◽  
Element Program ◽  
Stress States ◽  
Body Damage ◽  
Reconstructed Model

Techniques to analyze damage to a human body provide an important foundation to investigate the human body’s dynamics during accidents. However, the systematic investigation and analysis of accidents’ causes are limited due to a lack of suitable technology, personnel, and equipment. Recently, 3-D technologies and engineering verification through the finite element method have become widespread in forensics to investigate accidents’ causes and dynamic environments. Bone fracture analyses can provide important information on how victims may have died and injured. In this study, 3-D images obtained from multi-detector computed tomography of personal injuries and closed-circuit television, as well as image analyses based on forensic investigations, are used in a finite element program to analyze how ribs are broken during an accident and the possibility of further body damage. Technologies that deduce stress states and mechanisms are also developed in this study using FE analyses of the reconstructed model.

Stress Intensity Factor Solutions for Part-Throughwall Pipe Flaws

2003 ◽  
Author(s):  
Kerry M. Kidwell ◽  
Phillip Rush
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Complex Stress ◽  
Mode I ◽  
Element Analysis ◽  
Finite Element Program ◽  
Elastic Mode ◽  
Element Program ◽  
Stress States ◽  
Theoretical Stress

The need to quantify crack tip stress intensity solutions for complex stress states and geometries has forced the development of theoretical stress intensity solutions by numerical methods, such as finite element analysis (FEA). Using FEA, we developed a stress intensity handbook solution to the previously analyzed geometry of part-throughwall pipe flaws. This paper presents the results of this effort for infinitely long, axial internal flaws in cylinders. We also examined the mesh parameters that need to be considered to obtain reasonably accurate elastic mode I stress intensity solutions using the ANSYS finite element program.

scholarly journals Use of the Finite Element Method in Predicting Vibrations of Sandwich Beams and Plates Resting on Deformable Foundations Subjected to Moving Loads

2017 ◽  
Vol 63 (4) ◽  
pp. 51-69
Author(s):  
A. Zbiciak ◽  
M. Ataman ◽  
W. Szcześniak
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Boundary Conditions ◽  
Core Layer ◽  
Sandwich Beams ◽  
Moving Loads ◽  
The Finite Element Method ◽  
Finite Element Program ◽  
Element Program ◽  
Foundation Parameters

AbstractThis paper presents the capabilities of ABAQUS finite-element program [1] in modelling sandwich beams and plates resting on deformable foundations. Specific systems of sandwich beams and plates separated by an elastic core layer were subjected to the action of point and distributed moving loads. A few theoretical examples are provided to present different techniques of modelling the foundations and the moving loads. The effects of the boundary conditions and of the foundation parameters on the deflections of the analysed structures are also presented.

Further Developments in Applying the Finite Element Method to the Calculation of Temperature Distributions in Machining and Comparisons With Experiment

1983 ◽  
Vol 105 (3) ◽  
pp. 149-154 ◽  
Author(s):  
M. G. Stevenson ◽  
P. K. Wright ◽  
J. G. Chow
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Fields ◽  
The Finite Element Method ◽  
Finite Element Program ◽  
Temperature Distributions ◽  
Wide Range ◽  
Metal Machining ◽  
Element Program ◽  
Element Method

The finite element program developed in previous work [1] for calculating the temperature distributions in the chip and tool in metal machining has been extended in its range of application. Specifically, the program no longer needs a flow field as input and it can accommodate a wide range of shear angle and contact lengths. An important feature of this paper is that temperature fields from the finite element method have been compared with temperatures obtained with a previously described metallographic method [7]. This is the first time these two techniques have been used for the same machining conditions and the comparisons are very good.

Finite Element Analysis of a Quasi-Static Rolling Tire Model for Determination of Truck Tire Forces and Moments

1996 ◽  
Vol 24 (4) ◽  
pp. 278-293 ◽  
Author(s):  
A. A. Goldstein
Keyword(s):  
Finite Element ◽  
Ground Plane ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Finite Element Program ◽  
Truck Tire ◽  
Element Program ◽  
Longitudinal Slip ◽  
Tire Forces

Abstract The finite element method is used to simulate the slow (quasi-static) rolling of a radial truck tire subjected to ground plane tractions. Three conditions are considered, namely, (1) straight free rolling, (2) cornering, and (3) braking. Lateral and longitudinal slip are calculated by analyzing the motion of a moveable road surface relative to the wheel plane. Footprint moments are calculated for the cornering and braking condition. In addition, cornering stiffness, braking stiffness, and aligning stiffness are calculated and compared to measured results. Computational benchmark data is provided. The simulation was performed with the ABAQUS finite element program.

A Strength Calculation of a Nozzle Using Comparative Methods

2014 ◽  
Vol 601 ◽  
pp. 84-87 ◽  
Author(s):  
Serban Vasilescu ◽  
Costin Ilinca
Keyword(s):  
Finite Element ◽  
Pressure Vessel ◽  
Pressure Vessels ◽  
Comparative Methods ◽  
The Finite Element Method ◽  
Finite Element Program ◽  
Element Program ◽  
Section Viii ◽  
Torsional Loads ◽  
Division 2

The stresses and deflections developed due to all piping loads produce some significant deformation in the nozzles of the pressure vessels. In this paper a spherical pressure vessel with two cylindrical nozzles are analyzed. The stresses in the nozzles are evaluated using two comparative methods: one of them represents the classical way of using the superposition of the axial, bending and torsional loads; the other one is based on the requirements of the ASME Boiler and Pressure Vessel Cod, Section VIII, Division 2 and is developed by a FE analysis. In order to obtain the loads (forces and moments) at the end of the nozzle a specialized finite element program has been used. This program (Coade Caesar 5.30) allows studying the strength and flexibility behavior of the pipes that connect the analyzed nozzle with the rest of the plant. The results obtained are compared in order to find when the using of the classical methods of strength of materials can be used as conservative approaches. The finite element method is applied in order to check the most important load cases that appear during the interaction between pipes and shell. In this respect the sustained (proper gravity loads), expansion (thermal loads) and occasional (wind and seismic loads) are combined in order to check all the requirements of ASME. This study contains also the effect of the pressure trust and the influence of the real geometry of the junction (nozzle-shell) in the peaks of the stresses.

scholarly journals Analysis of the eigenfrequencies of the basalt machine parts by the FEM

2021 ◽  
Vol 343 ◽  
pp. 08002
Author(s):  
Ilie Octavian Popp
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Machine Tools ◽  
Structural Elements ◽  
The Finite Element Method ◽  
Finite Element Program ◽  
Element Program ◽  
Beam Type ◽  
Machine Parts ◽  
Plate Type

The aim of this paper was to carry out a theoretical (numerical) scientific research on the behavior of cast and recrystallized basalt, in order to use it as a material in the manufacture of structural elements of machine tools. A unitary methodology has been established for studying the eigenfrequency of structural elements for machine tools by the finite element method. Two basalt structural elements (beam type and plate type) were modeled, which were also made physically, and with the help of the COSMOS / Mark finite element program, the eigenfrequencies of the models was studied.

Finite Element Program Design of Bridge Structures with Internal and External Prestressing

2011 ◽  
Vol 250-253 ◽  
pp. 1493-1497
Author(s):  
Jian Yuan Sun ◽  
Yi Chao Yuan ◽  
Kun Peng Li
Keyword(s):  
Finite Element ◽  
Structural Analysis ◽  
Object Oriented ◽  
Analysis Program ◽  
The Finite Element Method ◽  
Finite Element Program ◽  
Design And Implementation ◽  
External Prestressing ◽  
Bridge Structures ◽  
Element Program

Recently internal and external prestressing enjoys a booming in the bridge construction, but the existing structural analysis programs of bridge can’t meet the requirements of analyzing the internal and external prestressing comprehensively. This paper will simulate internal and external prestressing effects by the finite element method; come up with some programming methods based on the object-oriented thought; and put forward the design and implementation methods of internal and external prestressing effect class by abstracting them to the corresponding class and elaborating the main features of each class, including the instantiation object and the typical method, to realizing the internal and external prestressing effects calculating. All of these will provide some references to the development of structural analysis program of bridge.

scholarly journals The impact of drilling and slitting construction on damage field: evolution characteristics in low-permeability coal seam

2021 ◽  
Vol 37 ◽  
pp. 205-215
Author(s):  
Heng Chen ◽  
Hongmei Cheng ◽  
Aibin Xu ◽  
Yi Xue ◽  
Weihong Peng
Keyword(s):  
Finite Element ◽  
Rock Mass ◽  
Damage Mechanics ◽  
Effective Strain ◽  
Secondary Development ◽  
Distribution Area ◽  
Finite Element Program ◽  
Element Program ◽  
Mining Face ◽  
The Impact

ABSTRACT The fracture field of coal and rock mass is the main channel for gas migration and accumulation. Exploring the evolution law of fracture field of coal and rock mass under the condition of drilling and slitting construction has important theoretical significance for guiding efficient gas drainage. The generation and evolution process of coal and rock fissures is also the development and accumulation process of its damage. Therefore, based on damage mechanics and finite element theory, the mathematical model is established. The damage variable of coal mass is defined by effective strain, the elastoplastic damage constitutive equation is established and the secondary development of finite element program is completed by FORTRAN language. Using this program, the numerical simulation of drilling and slitting construction of the 15-14120 mining face of Pingdingshan No. 8 Mine is carried out, and the effects of different single borehole diameters, different kerf widths and different kerf heights on the distribution area of surrounding coal fracture field and the degree of damage are studied quantitatively. These provide a theoretical basis for the reasonable determination of the slitting and drilling arrangement parameters at the engineering site.

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