Thermoplastic matrix phase transitions in a carbon fiber composite, studied by contact electrical resistivity measurement of the interface between two unbonded laminae

2002 ◽  
Vol 23 (5) ◽  
pp. 824-827 ◽  
Author(s):  
Zhen Mei ◽  
D. D. L. Chung
Keyword(s):  
Electrical Resistivity ◽  
Phase Transitions ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Resistivity Measurement ◽  
Matrix Phase ◽  
Electrical Resistivity Measurement ◽  
Carbon Fiber Composite ◽  
Thermoplastic Matrix

Microstructure and Damage of the Interlaminar Interface of Carbon Fiber Polymer-Matrix Composites, Monitored by Contact Electrical Resistivity Measurement

2001 ◽  
Vol 699 ◽  
Author(s):  
Shoukai Wang ◽  
Victor H. Guerrero ◽  
Daniel P. Kowalik ◽  
D.D.L. Chung
Keyword(s):  
Electrical Resistivity ◽  
Carbon Fiber ◽  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Resistivity Measurement ◽  
Interfacial Microstructure ◽  
Electrical Resistivity Measurement ◽  
Interface Temperature ◽  
Irreversible Effects ◽  
Carbon Fiber Polymer

AbstractThe microstructure and damage of the interlaminar interface of continuous carbon fiber polymer-matrix structural composites were monitored during dynamic changes in temperature, humidity and stress by contact electrical resistivity measurement. The stress was compressive, in the direction perpendicular to the interface. Temperature, humidity and stress had reversible effects on the resistivity, due to the effects on the interfacial microstructure, such as the extent of contact between fibers of adjacent laminae. These parameters had irreversible effects on the resistivity, due to relaxation and damage of the interface. The effects differed between composites with thermoplastic and thermoset matrices. The reversible effects allow the use of the contact resistivity as an indicator of temperature, humidity and stress.

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