In the case of relatively complex structures or loading conditions, the correct use of FEA provides stress analysis results which are much more accurate than can be achieved using hand stress calculations. In addition, non-linearities due to contacting surfaces, yielding, nonlinear elastic materials or geometric changes can be represented in the finite element stress analyses, leading to results which are more reliable.
Stress analyses are performed to calculate the stresses caused by many forms of loading, ranging from slowly applied loads, which can be considered to be static, through to highly transient loading which can occur under shock or impact events, or steady-state or transient thermal loads.
Depending upon a number of factors, including the duration of the loading and the extent of non-linearities, either an implicit FE stress analysis or an explicit FE stress analysis would be performed.
In some projects, the FE stress analysis identifies that the proposed design does not provide the required performance, or can be improved with respect to stress levels or to reduce the cost of manufacturing. In these instances, Eatec Engineering Analysis works with the client to optimise the design in order that it complies with the requirements, or uses material in the most efficient way.
Eatec Engineering Analysis undertakes the full range of FE stress analyses, from the most challenging highly complex problems through to simple linear studies.
The FE stress analyses are performed using the Abaqus FEA software suite, which is recognised as being a world leader, particularly with respect to nonlinear stress analyses.