Interfacial debonding of coated-fiber-reinforced composites under tension-tension cyclic loading

2000 ◽  
Vol 16 (4) ◽  
pp. 347-356 ◽  
Author(s):  
Shi Zhifei ◽  
Zhou Limin
Keyword(s):  
Cyclic Loading ◽  
Interfacial Debonding ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Coated Fiber

Sensing of Damage Mechanisms in Fiber-Reinforced Composites under Cyclic Loading using Carbon Nanotubes

2009 ◽  
Vol 19 (1) ◽  
pp. 123-130 ◽  
Author(s):  
Limin Gao ◽  
Erik T. Thostenson ◽  
Zuoguang Zhang ◽  
Tsu-Wei Chou
Keyword(s):  
Carbon Nanotubes ◽  
Cyclic Loading ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Damage Mechanisms

scholarly journals Hi-Nicalon fiber-reinforced celsian matrix composites: Influence of interface modification

1998 ◽  
Vol 13 (6) ◽  
pp. 1530-1537 ◽  
Author(s):  
Narottam P. Bansal ◽  
Jeffrey I. Eldridge
Keyword(s):  
Fiber Strength ◽  
Mechanical Damage ◽  
Young Modulus ◽  
Matrix Cracking ◽  
Fiber Reinforced Composites ◽  
Matrix Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Coated Fiber ◽  
Point Bend

Unidirectional celsian matrix composites having 42–45 vol% of uncoated or BN-SiC coated Hi-Nicalon fibers were tested in three-point bend at room temperature. The uncoated fiber-reinforced composites showed catastrophic failure with strength of 210 ± 35 MPa and a flat fracture surface. In contrast, composites reinforced with coated fibers exhibited graceful failure with extensive fiber pullout. Values of first matrix cracking stress and strain were 435 ± 35 MPa and 0.27 ± 0.01%, respectively, with ultimate strength as high as 960 MPa. The elastic Young modulus of the uncoated and coated fiber-reinforced composites were 184 ± 4 GPa and 165 ± 5 GPa, respectively. Fiber push-through tests and microscopic examination indicated no chemical reaction at the uncoated or coated fiber-matrix interface. The low strength of composite with uncoated fibers is due to degradation of the fiber strength from mechanical damage during processing. Because both the coated- and uncoated-fiber-reinforced composites exhibited weak interfaces, the beneficial effect of the BN-SiC dual layer is primarily the protection of fibers from mechanical damage during processing.

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