OS-E: 0905 Spot Weld Fatigue Analysis and Size Optimization of a Frame Structure
Demonstrates Spot weld fatigue optimization using OptiStruct.
Figure 1. FE-Model
Model Description
Objective here is to minimize the fatigue life of the structure using size optimization, by
using fatigue life and mass as response (Figure 1). Figure 2. Size Optimization Plot and Fatigue Life Plot
FE Model
Elements Types
CBAR
CQUAD
RBE2
The linear material properties are:
MAT1
Young’s Modulus
2.1E5 MPA
Poisson's Ratio
0.3
Density
7.9E-9
Results
The final design of the fatigue analysis and size optimization of the frame has improved
the fatigue life from 91% to 100%. Figure 3. Fatigue Life Optimization of the Frame Observations
