MSC.Fatigue 2000Wheels Module

MSC.Fatigue 2000Wheels Module

DEVELOPED IN COLLABORATION WITH BFG AEROSPACE AND

nCODE

TireLoads Data

Apply BoundaryConditions

WheelSolid Model

Create FEA Mesh

WheelFEA

Model

StressSolutions

MSCFatigue

Program

FatigueLife

Predictions

FatigueSolutions

MSC.Fatigue- WheelsPROCEDURE

QSG - Demo ModelQSG - Demo Model

Multiple Results - TravelMultiple Results - Travel

N=36 Static Load Cases

Multiple solutions performed to

obtain stresses for each node at

various positions relative to the load.

Stress at Node n

1 2 ... 3635...

Stress-time history createdfor each load condition...

Stress-time history createdfor each load condition...

• Display Results

PROCEDUREPROCEDURE

• Extract stress histories and calculate fatigue lifes from stress data from multiple FEA solutions– User selects the FEA solution sets used to define

each load condition

• Determine plane of critical fatigue damage– Calculate stresses and fatigue damage in angular

increments about each node– Sum damage for each angular increment

FE-Based Wheel FatigueAnalysis Using MSC.Fatigue

FE-Based Wheel FatigueAnalysis Using MSC.Fatigue

MODIFICATIONSTO MSC.FATIGUE

Wheel Fatigue: General SetupWheel Fatigue: General Setup

Wheel Fatigue: Loading Info...Wheel Fatigue: Loading Info...

After selecting “full analysis” on the job control form, the software produces a stress-time history for each node

containing N points (extracted from the N load cases). It then conducts a rainflow cycle count and

calculates fatigue damage (a typical SN analysis).

Wheel Fatigue: Job Control & Results

Wheel Fatigue: Job Control & Results

Interactive

FE-Based Wheel FatigueAnalysis Using MSC.Fatigue

FE-Based Wheel FatigueAnalysis Using MSC.Fatigue

RESULTS

Fatigue Life Contours (log scale)Fatigue Life Contours (log scale)

SummarySummary

• MSC.FATIGUE provides benefits of an FE-based fatigue analysis design process.– Reduced development time– Reduced development cost– Improved product quality

• MSC.FATIGUE “Wheels” module developed is fully functional in core Fatigue.