OS-E: 0900 Seam Weld Fatigue Analysis and Size Optimization of a Frame Structure
Demonstrates Seam weld fatigue optimization using OptiStruct.

Figure 1. FE Model
Model Files
Model Description
- FE Model
- Elements Types
- CQUAD
- MAT1
- Young’s Modulus
- 2.1E5 MPa
- Poisson Ratio
- 0.3
- Density
- 7.9E-9

Figure 2. Size Optimization Plot and Fatigue Life Plot
Results
The final design of the fatigue analysis and size optimization of the frame has 23% mass saving.
The Fatigue life improved from 22634 cycles to 504017 cycles at element 303718 and the minimum fatigue life was improved to 250415 cycles.