Damage and Failure Analysis of Co-cured Fiber-reinforced Composite Joints with Unidirectional Lay-up

2003 ◽  
Author(s):  
Caihua Cao ◽  
Dragos Dancila
Keyword(s):  
Failure Analysis ◽  
Composite Joints ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Damage And Failure ◽  
Reinforced Composite

The Failure of Carbon Fiber Reinforced Composite Analyzed by Acoustic Emission

2020 ◽  
Vol 405 ◽  
pp. 205-211
Author(s):  
Vladimír Mára ◽  
Jan Krčil ◽  
Lenka Michalcová ◽  
Elena Čižmárová
Keyword(s):  
Acoustic Emission ◽  
Carbon Fiber ◽  
Mechanical Test ◽  
Metallographic Analysis ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Damage And Failure ◽  
Reinforced Composite ◽  
Carbon Fiber Reinforced ◽  
Damage Processes

This paper focus on evaluation of behavior, damage and failure processes occurring during the loading cycles in the carbon fiber reinforced composite by acoustic emission method. Since acoustic emission is physical phenomenon that detects the released energy in form of waves spreading through the material due to stimulation of material by external or internal stress, it is possible to evaluate complex damage and failure processes. For that purpose, the standard and open holes tensile testing specimens with different number of plies were manufactured. Selected acoustic emission parameters were correlated with data obtained from mechanical test. Linear localization method together with signal analysis using Fast Fourier transform algorithm were used as another tool for detection and evaluation of spreading damage processes inside the composite during the load. Basic damage types inside the composite material were identified by metallographic analysis using light microscopy. More complex damage processes were observed on the fracture surface using stereomicroscopy and scanning electron microscopy.

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