Due to the strong centrifugal forces that the rotating parts are subjected to, if a blade is damaged in any unexpected process its load carrying area will be reduced making the blade more prone to an abrupt failure. If sudden failure occurs, the blade transforms its internal energy into ...
In-plane fracture involves crack extension by plastic deformation and rupture of the polymer matrix and failure of the fibres. Fibres do not always break at the crack tip, but can fail a distance away at a pre-existing flaw in the fibre where the strength is low. As the two faces of ...
Possible microstructure evolution with different cooling rates Hence, the properties of IDI are comparable to those of FP grades and not to those of IADI. The advantage of IDI, when compared to FP is in the perferritic, instead of pearlitic–ferritic structure, and the perferritic microstructure...
The failure strain εf refers to the true strain corresponding to the apparent sudden drop of the engineering stress σe. 3. Results and discussion 3.1. Ductile fracture and brittle fracture For a given ‘material’, i.e., a certain combination of (f0, σ0, n), both ductile fracture ...
Although the coupled model may reflect the failure process of materials, there are too many parameters in these models, resulting in highly complicated parameter calibration and calculation work. Conversely, the uncoupled models assume that the evolution of internal damage does not affect constitutive ...