On edge crack torsion test method to measure Mode III interlaminar fracture toughness of composite laminates

1998 ◽  
Author(s):  
Hiroshi Suemasu
Keyword(s):  
Fracture Toughness ◽  
Composite Laminates ◽  
Edge Crack ◽  
Torsion Test ◽  
Test Method ◽  
Interlaminar Fracture Toughness ◽  
Mode Iii ◽  
Interlaminar Fracture

Numerical analysis of the Edge Crack Torsion test for mode III interlaminar fracture of composite laminates

2009 ◽  
Vol 76 (4) ◽  
pp. 469-478 ◽  
Author(s):  
M.F.S.F. de Moura ◽  
M.V.C. Fernandez ◽  
A.B. de Morais ◽  
R.D.S.G. Campilho
Keyword(s):  
Numerical Analysis ◽  
Composite Laminates ◽  
Edge Crack ◽  
Torsion Test ◽  
Mode Iii ◽  
Interlaminar Fracture

Experimental Investigation of Interlaminar Fracture Toughness of CFRP Composites with Different Stitching Patterns

2005 ◽  
Vol 297-300 ◽  
pp. 189-194 ◽  
Author(s):  
Hong Ping Zhao ◽  
Robert Kwok Yiu Li ◽  
Xi Qiao Feng
Keyword(s):  
Fracture Toughness ◽  
Composite Laminates ◽  
Test Method ◽  
Mode I ◽  
Interlaminar Fracture Toughness ◽  
Interlaminar Fracture ◽  
Reinforced Plastics ◽  
Mode I Fracture Toughness ◽  
Straight Line ◽  
Delamination Resistance

Through-thickness stitching is one of the most effective techniques to improve the delamination resistance of composite laminates. The effects of two different stitching patterns on the mode-I interlaminar fracture toughness of unidirectional carbon fiber reinforced plastics (CFRP) are examined experimentally in the present paper by using the double cantilever beam (DCB) test method. It is found that the zigzag stitching pattern results in a better toughening effect than the straight line pattern, and that the stitching density also has a considerable influence on the mode-I fracture toughness.

Study on the Mode I Interlaminar Fracture Toughness of Multi-Directional Composite Laminates

2013 ◽  
Vol 718-720 ◽  
pp. 186-190 ◽  
Author(s):  
Zong Hong Xie ◽  
Xiang Li ◽  
Jian Zhao ◽  
Jie Hao ◽  
Yan Peng Sun ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Composite Laminates ◽  
Testing Machine ◽  
Beam Theory ◽  
Test Method ◽  
Resin Matrix ◽  
Mode I ◽  
Interlaminar Fracture Toughness ◽  
Bismaleimide Resin ◽  
Interlaminar Fracture

The double cantilever beam (DCB) test method and the modified beam theory are adopted to investigate the Mode I interlaminar fracture toughness of multi-directional composite laminates. The test procedure was developed by using a stereoscopic microscope to observe the delamination front tip and a testing machine to record the displacement and load data. A dial indicator was used to eliminate the error due to initial clearance in the clamp. A modified beam theory and a compliance calibration method were used to calculate the interlaminar fracture toughness. The Mode I interlaminar fracture toughness of carbon fiber reinforced bismaleimide resin matrix (BMI) composite laminates with four different interface patterns ( 0/0, 45/-45, 0/-45 and 0/90, respectively) was obtained. The results show that the patterns of interface ply angles have an obvious influence on Mode I interlaminar fracture toughness of composite laminates.

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