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There are different types of acoustic analysis, and these depend on what is required from the analysis: Static Acoustics, Harmonic Acoustics, Modal Acoustics. Harmonic Acoustics is used when loads are available, or results are required in the frequency domain. This is typically the case for analyses...

In FEA there are many ways to model acoustics, depending on the problem and the specific requirements of the analysis. The most detailed way is to model the whole acoustic domain in FEA, which means that the object as well as the fluid it is operating...

Acoustics is the study of mechanical waves in fluids and solids. Examples of acoustic waves are: Vibration (below human hearing range) Sound (in human hearing range) Ultrasound (above human hearing range) Acoustic analyses can either be used to determine how mechanical waves change through a structure...

The three stages of fatigue failure in a component are: Crack Initiation Crack Propagation Rapid Fracture Crack initiation, sometimes called crack formation, occurs in areas of concentrated stress on the surface of a component, and in areas where surface defects can be found. As surface defects...

Rainflow Cycle counting is a method to determine the number of fatigue cycles in a load time history. For a load of constant amplitude, it is easy to calculate the fatigue due to cumulative damage (https://fea-solutions.co.uk/cumulative-fatigue-damage/) using the S-N curve (https://fea-solutions.co.uk/s-n-curves/) and Miner's Rule. In...

A fatigue load cycle is made of two components: Mean Stress – The average stress throughout the cycle. Alternating stress – This is the difference between the mean stress and the peak (minimum or maximum) stress in the cycle. A fatigue analysis is conducted assuming that...

A fatigue analysis (https://fea-solutions.co.uk/fatigue-analysis/) is straight forward if the structure is subjected to just one load case, which can consist of several loads, but with the loading and unloading acting simultaneous for all of them. It gets more complicated if there is just one load case,...

Strain based fatigue analysis is one of three approaches to assess fatigue (https://fea-solutions.co.uk/fatigue-analysis/). It is also called critical location approach, local stress-strain analysis, strain-life approach, or crack initiation analysis. A strain based fatigue analysis concerns itself with describing the initiation or beginning of a crack. Strain...

Stress based fatigue analysis is one of three approaches to assess fatigue (https://fea-solutions.co.uk/fatigue-analysis/). It is sometimes referred to as the stress-life approach. A stress based fatigue analysis should be performed in the following scenarios: High cycle fatigue problems, for structures that have to withstand more than...