Carbon-fiber-reinforced plastics (CFRP) are being used for highly loaded lightweight structural components for many years. Up to now mostly insufficient two-dimensional classical failure criterions, which are embedded into FE-software like Tsai-Wu, Hill, etc. have been used for the dimensioning of composites. To achieve better predictions of the three-dimensional complex composite failure behavior newer, so-called action-plane based failure criterions have been developed, e.g.: PUCK, JELTSCH-FRICKER or LaRC04. In addition to this, the complex step-by-step component failure process including post-failure load redistribution can be accurately simulated using a combination of these newer criterions with a convincing material degradation model. Within this work this new method was implemented into Abaqus to investigate the complex failure behavior of a CFRP flange connection of a Rolls-Royce aero engine. For instance, it is shown, that small radii next to the bolt-connection result in three-dimensional stress states that initialize delamination and gradual component stiffness reduction. The comparison of additional experimental and numerical data confirmed the implementation and prediction quality of new action-plane based failure criteria into Abaqus. Due to this the knowledge about the complex component behavior has been significantly extended, such that finally a cost-reducing design improvement was available.
Application of a newer inter-fiber-failure criteria on CFRPs in aero engine development
Anwendung eines neuen Ausfallkriteriums zwischen den Fasern in CFRPs bei der Flugmotorentwicklung
2009
15 Seiten, 11 Bilder, 10 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
Rapid-Curing Adhesives for CFRPS
Springer Verlag | 2013
|Emerald Group Publishing | 1940
Engineering Index Backfile | 1935
Emerald Group Publishing | 1932
|