APPLIED MECHANICS

Lecture 13

Slovak University of TechnologyFaculty of Material Science and Technology in Trnava

Available Commercial FEM Software Packages

ALGOR ANSYS

COSMOS/M

STARDYNE/FEMAP

MSC/NASTRAN

SAP90/2000

ADINA

NISA

GT Strudl

ABAQUS

Plaxis

...

Matlab based:

CalFem

FemLab

CAE products: Pro/ENGINEER

Pro/FEA

Pro/MECHANICA

Cosmos/Works

Inventor/ANSYS

IDEAS

What is Finite Element Analysis?

What is Finite Element Analysis?

Divide a continuum with infinitely degrees of freedom in to finite elements with a given number of DOF

An element is geometrical defined by a number of nodes in which the elements are connected. The directions a node can move in is termed degrees of freedom

Introduction to ANSYS

ANSYS - FEA software enables engineers to perform the following tasks: Build computer models or transfer CAD models of structures,

products, components, or systems.

Apply operating loads or other design performance conditions.

Study physical responses, such as stress levels, temperature

distributions, or electromagnetic fields.

Optimize a design early in the development process to reduce

production costs.

Do prototype testing in environments where it otherwise would

be undesirable or impossible (for example, biomedical

applications).

Introduction to ANSYS

Facilities in ANSYS: Structural Linear

Structural Nonlinear

Structural Contact/Common Boundaries

Structural Dynamic

Structural Buckling

Thermal Analysis

CFD Analysis

Electromagnetic -Low Frequency

Electromagnetics-High Frequency

Field and Coupled-Field Analysis

Introduction to ANSYS

Facilities in ANSYS: Solvers

Iterative

Sparse

Frontal

Explicit

Preprocessing

Postprocessing

General Features

Interfacing with ANSYS

Matlab, Excel CAD –Pro/ENGINEER IGES Log-file editing Application Programming Interface (API) ...

Analysis Phases

PREPROCESSOR

Build the model.

SOLUTION

Apply loads and obtain the solution.

POSTPROCESSOR

Review the results.

Analysis Phases - PREPROCESSING

Analysis Phases - PREPROCESSINGElement Type

MESHMulti-PointConstraintPIPEPLANEPRETS (Pretension)SHELLSOLIDSOURCeSURFaceTARGEtTRANSducerUSERVISCOelastic(or viscoplastic)

BEAMCIRCUitCOMBINationCONTACtFLUIDHF (HighFrequency)HYPERelasticINFINiteINTERfaceLINKMASSMATRIX

Analysis Phases - PREPROCESSING

Analysis Phases - PREPROCESSING

Analysis Phases - SOLUTION

Analysis Phases - SOLUTION Types of loads

Structural - displacements, forces, pressures, temperatures (for thermal strain), gravity

Thermal - temperatures, heat flow rates, convections, internal heat generation, infinite surface

Magnetic - magnetic potentials, magnetic flux, magnetic current segments, source current density, infinite surface

Electric - electric potentials (voltage), electric current, electric charges, charge densities, infinite surface

Fluid - velocities, pressures

Loads - six categories: DOF constraints forces (concentrated loads) surface loads body loads inertia loads coupled-field loads

Analysis Phases - POSTROCESSOR

Analysis Phases - POSTPROCESSOR

General Postproc> Plot Results > Contour Plot > Nodal Sol

Analysis Phases - POSTPROCESSOR

Element Table

Analysis Phases - POSTPROCESSOR

Plot Path