What will happen to the life of a component if i change the input frequency of the actuator keeping the load and number of cycles constant in a component test rig ?????
Re: What is the effect of change in frequency of the input actuator ??
01/15/2010 11:42 AM
It depends on the material the component is made off.
In general if you maintain the load AND the cycles I do not understand your question.
Do you make a test till destruction ?
Such tests (Wöhler curves) are based on constant load amplitude and frequency, the number of cycles till destruction is a RESULT cannot be programmed. You can of course stop the test at a number of cycles but if you do so then you vary the load to determine at which load the failure occurs at the given number of cycles.
For some materials the higher the frequency the more energy is dissipated in the part due to hysteresis and can have an influence on the result.
If your load is a displacement and not a force or torque the rheologic behaviour of the material could at higher frequencies increase the stress level and thus reduce the number of cycles for a given amplitude.
Change in Frequency of Input Actuator
Re: What is the effect of change in frequency of the input actuator ??
