# OS-E: 0330 Sine Sweep Fatigue Analysis

Sine sweep fatigue analysis of a simple bracket is done to study the fatigue life of the structure under sinusoidal loading using OptiStruct.

## Model Files

Refer to Access the Model Files to download the required model file(s).

The model file used in this example includes:

Analyse_Fatigue_Sinus_v4.fem

## Model Description

Frequency Response Stress results from the Frequency Response Analysis are used to calculate the frequency-dependent stress range, which are subsequently used to calculate Fatigue damage based on sweep rate. Here the stress-life (SN) approach is used for calculating the fatigue life of the component.

- Bracket
- First order Tetra elements

- Skin Surface Near the Fillet Region
- First order Tria elements

**MAT1 with MATFAT**- Young's Modulus
- 2.1 x 10
^{5}N/mm^{2} - Poisson's Ratio
- 0.3
- Density
- 7.9 x 10
^{-9}ton/mm^{3} - Shear Modulus
- 0.02 N/mm
^{2}

**MATFAT**- Yield Strength
- 180 MPa
- Ultimate Tensile Strength
- 340 MPa
- Fatigue Strength Coefficient
- 936
- First Fatigue Strength Exponent
- -0.161907
- Limit of Endurance
- 1 x 10
^{30} - Fatigue Limit
- 1