Structural failures due to a single static loading are rare. The majority of structural failures are fatigue failures caused by fluctuating loads. Stress-life (SN) and strain-life (EN) are CAE fatigue analysis methodologies that can be used to predict service life in a virtual environment. ANSYS nCode DesignLife has both SN and EN fatigue engines, but which method should be used? It depends upon the application.
Many common processes such as those in manufacturing and transportation produce random vibration loading. To ensure the structural integrity of components subjected to these processes, the fatigue damage caused by vibration loading must be assessed. ANSYS Mechanical and ANSYS nCode DesignLife software can be used to estimate the fatigue life of components subjected to random vibration loading.