WHAT is infinite elements!?

Infinite elements are a type of numerical method used in computational mechanics, particularly in finite element analysis (FEA), to model problems with unbounded or infinite domains. Unlike traditional finite elements that require a defined boundary, infinite elements extend outward to simulate the effects of infinity, allowing for more accurate representation of wave propagation, fluid flow, or other phenomena that do not have a clear boundary. They are especially useful in geotechnical engineering and acoustics, where modeling the behavior at great distances from the source is necessary.