Types of analysis

AnalysisAnalysis:The word is a transcription of the ancientGreek (analusis, "a breaking up", fromana-"up, throughout" andlysis"a loosening")

Analysisis the process of breaking acomplex topicor substance into smaller parts to gain a better understanding of it. The technique has been applied in the study ofmathematicsandlogicAnalysis word common for following:ChemistryIsotopesBusinessComputer scienceEconomicsEngineering (for us)IntelligenceLinguisticsLiteratureMathematicsMusicPhilosophyPsychotherapySignal processingStatisticsOther

For Us

FEM CFD1. A static load is the effect of gravity on an object or structure.Example of a static load:

Weight of a bridge

2. A dynamic load is the forces that move or change when acting on a structure. Example of a dynamic load:

Force of wind or the weight of a truck

TYPES OF FEM ANALYSIS:

Structural Static Stress AnalysisBuckling AnalysisFatigue AnalysisForced Harmonic Oscillations AnalysisThermal Analysis1. Structural Static Stress AnalysisMain results of static analysis are as follows:field of displacements of the structure in nodes of finite-element mesh;field of strain;field components of the stress;energy of deformation;nodal forces;field distribution of safety factor; This information is usually sufficient to predict the behavior of structures and make a decision how to optimize the geometric shape of the product.

STATIC ANALYSIS: EXAMPLE frames r bridge structures

2. Fatigue AnalysisThe Fatigue Analysismodule is used in conjunction withStatic analysis and allows one to evaluate the strength of a structure,

which is subjected to cyclic loading. This type of loading is usual in mechanical and structural engineering.

Fatigue Analysis: Example crank shaft

3. Frequency AnalysisFrequency Analysis determines a part's natural frequencies and the associated mode shapes.

It can determine if a part resonates at the frequency of an attached, power-driven device, such as a motor.Frequency Analysis Example

Buckling AnalysisCritical buckling load analysis examines the geometric stability of models under primarily axial load.

It helps avoid failure due to buckling which refers to sudden large displacements and can be catastrophic if it occurs in the normal use of most products.Buckling Analysis

Forced Harmonic Oscillations AnalysisAnalysis of forced oscillations is performed to predict the behavior of a structure under external actions which change in accordance with the harmonic law.

These actions include force and/or kinematic excitation. In addition to it, the impact of the system damping may be taken into account.Forced Harmonic Oscillations Analysis

Thermal AnalysisThermal Analysis the heat conduction problem has two statements:Steady-state thermal conductivity - the calculation of the steady (stationary) temperature fields of structures under the applied thermal boundary conditions;

Time-dependent thermal conductivity - the calculation of temperature fields of construction is dependent on the time, that is, temperature loads have been made relatively recently, and there is a process of active redistribution of temperature fields;

HEAT TRANSFER :

The boundary conditions used are : Temperature, heat flux, convective heat transfer, thermal power, radiation.

Thermal Analysis Example :

Procedure for the analyzingSteps for AnalyzingModelling using (Pro-E, Catiaetc)

Importing that component to Analyzing software like (Ansys,Abacus,Hypermesh,Nastran,Patran,Ansa,.etc)

Then the following procedure for getting results.Preprocessing Meshing the componentSelecting the materials from the list (its available in software itself) for the component.Giving the boundary conditions or loading conditions

Post processingSeeing the results Nodes and Elements

Types of elements for meshing:

Meshing the component

Quadrilateral mesh

Triangle mesh

Railway track meshing

Railway track result

Conditions for meshing :Stress analyzing: First order Trianglemesh and tetramesh should not use for stress analyzing during meshing.

Second order Trianglemesh and tetramesh can use for stress analyzing during meshing.

Crash analyzing: Avoid Rotating quads in crash analyzing during meshing

Difference between First order and second order element

Rotating quad in meshing

Crash analyzing

AnimationsCrash analyzing animation:

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Thats all FEM Basics concepts