PREPARED BY:PREPARED BY:Vikas Patolia (07DME303)Vikas Patolia (07DME303)Vipul Patel (07DME306)Vipul Patel (07DME306)

What is CAE?What is CAE?

“It is the performance of engineering tasks or functions with the aid of a computer.”

It provides the means to cope with the demand for increased productivity of more sophisticated and reliable product design and manufacturing in today’s market.

The mechanical engineer will, have studied, used or been exposed to a variety of activities such as engineering drawing, design, manufacturing techniques and organizational planning and control.

There is a computer aided means for all these, and all fall into the definition of CAE.

Need ForNeed ForComputer Aided EngineeringComputer Aided Engineering

The need to develop computer-assisted techniques in engineering has arisen largely because of modern market demands.

People require goods of high quality and functionality and to meet this demand there is need for increased productivity in industry.

Areas of CAEAreas of CAE

EngineeriEngineering ng

Process Process

inspection

RapidPrototyping

ProcessSimulation

StressSimulation

FlowSimulation

3-D CADDesign

Production

PartApproval

Types Of CAETypes Of CAE

Thermal Analysis

Stress Analysis Flow Analysis

Dynamic Analysis

Computer Aided Engineering Computer Aided Engineering SoftwareSoftware

Design: AutoCAD, Pro/E, SolidWorks, … Electrical: Spice, E/Workbench, … Structural/vibrations: Adina, Marc, … Fluids: FIDAP, Fluent, … Manufacturing: Moldflow, ProcSim, … Thermal: Ansys, Cosmos, …

AdvantagesAdvantages

Less development timeLess time to marketHigher qualityHigher white collar productivityHigher reliabilityLess chances of failure

ApplicationApplication

Structural EngineeringAutomotive Driveline SimulationDesign Engineering Construction of 3D surfacesProgramming for NC-CNC machinesRedesigningVibration Analysis

How Analysis is done in CAE?How Analysis is done in CAE?

Analysis of scooter body DesignAnalysis of scooter body Design

Scooter Body DesignScooter Body Design

Design Decisions Shape Material Thickness

Performance: Strength? Weight? Cost?

Modeling StepsModeling Steps

Initial Body DesignInitial Body Design

Cross Sections of BodyCross Sections of Body

Finite Element MeshFinite Element Mesh

Finite elements decompose complex shapes into many features.

Mesh

Load and Boundary ConditionsLoad and Boundary Conditions

Load

Boundary

Conditions

Stress Results for Initial Design Stress Results for Initial Design

Max stress =23840

Allowed stress=5000

The stress of RED area is far above the allowed stress!!

Thickness=2.5 mm

RedesignRedesign

Max stress=8727

Allowed stress=5000

The stress of RED area is still above the allowed stress!

Thickness=5 mm

Redesign: Add BossesRedesign: Add Bosses

Bosses

Max stress = 4696

Allowed stress=5000

Final Design ResultsFinal Design Results

The MAX stress is below the allowed stress.

ReferencesReferences

Google.comWikipedia.comAlibaba.comBooks:

Computer aided engineering An introduction to CAE. Concurrent Engineering in product

design and development