Damage identification and fracture behavior of 2.5D SiCf/SiC composites under coupled stress states

Damage identification and fracture behavior of 2.5D SiCf/SiC composites under coupled stress states

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Continuous fiber-reinforced silicon carbide composites have received significant attention due to their high-temperature mechanical stability.However, their widespread implementation has been hindered by intricate fracture mechanisms and Fluorescent Globe limited toughness.This study presents a real-time approach for identifying damage type in 2.5D SiCf/SiC composites and highlights the significant impact of minor eccentric loading angle on the fracture behavior and mechanical properties using acoustic emission (AE).Even a slight degree of eccentric loading angle can significantly alter the fracture behaviors, leading to a significant increase in fracture toughness.

The fracture damage evolution law of 2.5D SiCf/SiC under varying eccentric loading angles Statues was investigated with the help of the AE damage identification, fracture morphology and finite element analysis.These findings provide valuable insights for multi-axis stress analysis of 2.5D high-performance composites.