Attend an fe-safe/Composites™ webinar.
Composites are an attractive material option for designers and manufacturers because of their high strength and stiffness to weight ratio as well as the ability to tune the material properties for specific applications. As their use becomes more widespread, there is an increasing need to understand their behaviour and design life. Until now, an accurate and robust fatigue life prediction tool for composites has not been available.
Predicting fatigue life in composites is challenging because even simple load states lead to complex behaviour in the individual composite constituents. Furthermore, the effects of frequency and load history can only be dealt with adequately by using physics-based theories.
fe-safe/Composites™ meets these challenges head-on by combining multicontinuum theory with kinetic theory to introduce a game-changing technology for fatigue life prediction in composite structures.
Composites are intrinsically different from metals and require a different approach to fatigue analysis
Key differences between metals and fiber-reinforced composites drive physically different load responses:
This results in characteristically different responses to fatigue loading.
Fatigue failure in composites is different from that in metals
Metal fatigue failure is characterised by slow crack propagation; cracks initiate and propagate in a series of notch blunting and crack propagation events. By contrast, composite fatigue failure is a diffuse accumulation of damage, including multiple damage modes and complex failure mechanisms.
This fundamental difference in material response requires a different approach to be used for the analysis of composite fatigue.
Traditional metal analysis methods are not applicable to composites