Harmonic Vibration with Fatigue.

As we Knew SOLIDWORKS Simulation has much more capabilities in analyzing the Isotropic material. Added to this point, now few more enhancements in dynamic loading with estimated lifetime prediction of the component. In real time, everything changes with respect to time, in the same manner, looking into Dynamic loading conditions which play a vital role.

In this study, we are discussing the Harmonic Vibration with Fatigue which will consider the harmonic loading and No of cycles in terms of time.

Fatigue strength reduction Factor:

Use this factor, between 0 and 1, to account for differences in test environment used to generate the S-N curve and the actual loading environment. The program divides the alternating stress by this factor before reading the corresponding number of cycles from the S-N curve. This is equivalent to reducing the number of cycles that cause failure at a certain alternating stress. Fatigue handbooks suggest numeric values for the fatigue strength reduction factor.

you can predict the damage due to fatigue and remaining life of a part that is exposed to repeated cyclic (or sinusoidal) loading at a given operating frequency. The fatigue analysis uses the stress results from a selected linear dynamic – harmonic study to calculate the alternating stresses for extracting the cycles to failure from the part’s material S-N curve.

Harmonic Vibration with Fatigue-2


You can plot results for: Life (number of cycles that cause fatigue failure, Damage (percentage of the life of part consumed by this fatigue event), and Load Factor of safety against fatigue failure. For example, a load factor of safety of 3.0 at a location indicates that the defined fatigue event will cause fatigue failure at this location if you multiply the alternating stress by a factor of 3.0. A damage ratio of 1 (or 100%) indicates that the life of the part has been used during this fatigue event and structural failure is expected.

Harmonic Vibration with Fatigue-1



The selected one deals with the Harmonic Loading Condition with Fatigue.

If the operating frequency limit has a certain range of frequencies starting at a non-zero point (for example: 5 Hz – 500 Hz), include a point at (0, 0) when defining a base excitation curve to run the harmonic study. The software uses a Log-Log interpolation method to interpolate the frequency values that fall between the frequency curve input points. The software converts the input values of the curve to Log-Log scale and interpolates linearly (in the Log-Log domain) to find the values of frequencies that fall between the curve points.


SOLIDWORKS Simulation has more capabilities in Handling the different industries in a better way to provide engineering solutions in the Advanced techniques without any compromise the technology served.


To know more log on to www.simtek.in ring us at +91-8754447021 or mail us at info@simtek.in Authorized Reseller SIM Technologies Pvt Ltd located in Chennai, Coimbatore, Kolhapur, New Delhi & Bangalore.