516 Evaluation of Fiber/Matrix Interfacial Fracture Toughness in FRP Crack Propagation with Real-size Model Composite

2010 ◽  
Vol 2010.85 (0) ◽  
pp. _5-16_
Author(s):  
Kozo Koiwa ◽  
Shinya Ito ◽  
Hiroshi Tanaka ◽  
Chiaki Hiwa ◽  
Yoshikazu Nakai ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Crack Propagation ◽  
Interfacial Fracture ◽  
Interfacial Fracture Toughness ◽  
Model Composite ◽  
Real Size ◽  
Fiber Matrix ◽  
Size Model

Estimation of Fracture Toughness of Fiber/Matrix Interface

2013 ◽  
Vol 785-786 ◽  
pp. 145-150 ◽  
Author(s):  
Yu Ping Zhao ◽  
Hong Yuan ◽  
San Xing Liu
Keyword(s):  
Fracture Toughness ◽  
Energy Balance ◽  
Matrix Material ◽  
Interfacial Fracture ◽  
Energy Balance Equation ◽  
Matrix Composites ◽  
Interfacial Fracture Toughness ◽  
External Work ◽  
Numerical Result ◽  
Fiber Matrix

To estimate the level of interfacial adhesion between the fiber and polymer-matrix in fiber/matrix composites, interfacial fracture toughness was derived based on an energy balance scheme. A break gap occurring at the initial interface debond during fragmentation test was taken into account. The external work and work done against friction slip at debonded interface were included in energy balance scheme. The interfacial fracture toughness obtained is a function of fiber and matrix material properties and critical debond strain which is the external strain applied on the specimen to initiate interfacial debonding. The break gap calculated increases with increasing applied load and decreasing friction coefficient. The proportion of each energy terms in energy balance equation was calculated. Comparison between the predicted interfacial fracture toughness and that numerical result was done.

421 Measurement of Mode II Fiber/Matrix Interfacial Fracture Toughnessby Using Real-Size Model Composites

2011 ◽  
Vol 2011.86 (0) ◽  
pp. _4-21_
Author(s):  
Takeshi Tsukahara ◽  
Kozo Koiwa ◽  
Hiroshi Tanaka ◽  
Yoshikazu Nakai ◽  
Mari Bonde
Keyword(s):  
Interfacial Fracture ◽  
Mode Ii ◽  
Real Size ◽  
Fiber Matrix ◽  
Size Model
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