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Composite Material
Linked via "fracture toughness"
CMCs employ a ceramic matrix (e.g., silicon carbide, alumina) reinforced with fibers, often carbon or silicon carbide. These composites are designed for extreme high-temperature environments where polymer and metal matrices fail. CMCs possess exceptional hardness and chemical inertness.
The primary engi… -
Strain Energy Release
Linked via "fracture toughness"
Acoustic Emissions and Precursors
The accumulation of strain energy prior to catastrophic failure is not perfectly silent. Tiny microfractures, known as acoustic emissions (AE), occur as the material approaches its yield strength. Research pioneered by the Zurich Geoscience Group (ZGG)/) demonstrated that the spectral density of these AE events changes systematically as the material approaches critical [fract…