Non-destructive testing modeling with finite element method (problem 8)

2005 ◽  
Author(s):  
P. Wendling ◽  
Y. Le Floch ◽  
F. Foucher ◽  
J.-C. Verite ◽  
C. Guerin ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive ◽  
Element Method

Design of controllable units for mechanical transmissions

2021 ◽  
pp. 22-26
Author(s):  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Simulation Modeling ◽  
Mechanical Transmission ◽  
Non Destructive Testing ◽  
The Finite Element Method ◽  
Destructive Testing ◽  
Bench Tests ◽  
Non Destructive ◽  
Element Method

The scientific and methodological foundations of the design of mechanical transmission units of transport and technological machines, adapted for diagnosing the operability by thermometry parameters, based on the results of bench tests and simulation modeling by the finite element method, are considered. An algorithm is developed for the design testing of power units for adaptability to thermometric non-destructive testing. Keywords: design, controllability, diagnostics, thermometry, finite element method [email protected]

scholarly journals Non-Destructive Testing of a Sport Tribune under Synchronized Crowd-Induced Excitation Using Vibration Analysis

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2148 ◽  
Author(s):  
Karol Grębowski ◽  
Magdalena Rucka ◽  
Krzysztof Wilde
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Limit State ◽  
Non Destructive Testing ◽  
The Finite Element Method ◽  
Destructive Testing ◽  
Sensitivity Tests ◽  
Load Function ◽  
Non Destructive ◽  
Element Method

This paper presents the concept of repairing the stand of a motorbike speedway stadium. The synchronized dancing of fans cheering during a meeting brought the stand into excessive resonance. The main goal of this research was to propose a method for the structural tuning of stadium stands. Non-destructive testing by vibration methods was conducted on a selected stand segment, the structure of which recurred on the remaining stadium segments. Through experiments, we determined the vibration forms throughout the stand, taking into account the dynamic impact of fans. Numerical analyses were performed on the 3-D finite element method (FEM) stadium model to identify the dynamic jump load function. The results obtained on the basis of sensitivity tests using the finite element method allowed the tuning of the stadium structure to successfully meet the requirements of the serviceability limit state.

An analytical solution to the problem of a cup-cored coil located over a conducting plate with a hole

2020 ◽  
Vol 62 (12) ◽  
pp. 719-724
Author(s):  
G Tytko ◽  
Z Kowalik
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Analytical Solution ◽  
Magnetic Vector Potential ◽  
Destructive Testing ◽  
Conducting Plate ◽  
Conducting Materials ◽  
Calculation Results ◽  
Non Destructive ◽  
Element Method

Pot-core coils are utilised in eddy current non-destructive testing (NDT) to detect defects in conducting materials. In this paper, an analytical solution to the problem of a cup-cored coil placed over a three-layer plate with an inner hole is obtained. Using the truncated region eigenfunction expansion (TREE) method, expressions for the magnetic vector potential of the filamentary coil, and final formulae for the impedance of the cylindrical coil, are derived. These formulae make it possible to model conducting magnetic and non-magnetic plates with an internal hole, a surface hole, a subsurface hole and a through hole. The final expressions in a closed form are implemented in MATLAB. The calculation results are verified using finite element method (FEM) models created with COMSOL Multiphysics, Finite Element Method Magnetics (FEMM) and Ansys Maxwell software packages. Very good agreement for the coil impedance components is obtained within the whole studied frequency range of 1 kHz to 100 kHz.

Finite Element Modeling of Electromagnetic Crimping of Cu-SS Tube-to-Tube Joint Along With Simulation of Destructive Testing for Strength Prediction of the Joint

2020 ◽  
Vol 143 (4) ◽  
Author(s):  
Deepak Kumar ◽  
Sachin D. Kore ◽  
Arup Nandy
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Compressive Strength ◽  
Element Model ◽  
Strength Prediction ◽  
Force Distribution ◽  
Radial Deformation ◽  
Destructive Testing ◽  
Pull Out ◽  
Element Method

Abstract This work explores the tube-to-tube joining of copper (outer) and stainless steel (inner) using electromagnetic crimping. Stand-off distance is kept constant during all the experiments. ls-dynaTM electromagnetic module, which utilizes finite element method combined with the boundary element method, is used to perform numerical simulations and the model is validated with experimentally observed thinning and radial deformation of the outer tube during electromagnetic crimping. Effect of slit of the field shaper on Lorentz force distribution is studied. It is observed that the slit of the field shaper leads to uneven radial deformation. Furthermore, a novel finite element model has been developed to predict the pull-out and compressive strength of the joint. Results are validated with the experimentally observed data.

Rapid Defect Reconstruction Based on Genetic Algorithm and Similar Model in Remote Field Eddy Current Non-Destructive Testing

2014 ◽  
Vol 518 ◽  
pp. 269-274 ◽  
Author(s):  
Xiao Jie Xu ◽  
Wen Lin Pei
Keyword(s):  
Genetic Algorithm ◽  
Finite Element ◽  
Eddy Current ◽  
Non Destructive Testing ◽  
Similar Model ◽  
Destructive Testing ◽  
Defect Reconstruction ◽  
Element Computation ◽  
Non Destructive ◽  
Finite Element Computation

Defect reconstruction of remote field eddy current belonged to electromagnetic inverse problem in materia Non-Destructive Testing. In view of disadvantages in present defect reconstruction methods, such as over-long time or excessive need for training samples, a new defect reconstruction method based on similar model and genetic algorithm was investigated as follows: similar model between non-axisymetric defect and axisymetric defect was represented, and proportionality factor was deduced by skin depth equation. As a result, the time-consuming forward problem solution in defect reconstruction, which using 3D finite element computation conventionally, was simplified to 2D finite element computation. At the same time, a method designed to accelerate convergence of genetic algorithm was adopted, and more times saving were obtained. Computation results show that, total defect reconstruction time is reduced to 7.6%, compared with directly 3D finite elemet computation, while reconstruction accuracy remains almost the same.

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