scholarly journals Mode II interlaminar fracture toughness of carbon fabric composite laminates with carbon nanotube oriented by magnet

2017 ◽  
Author(s):  
Xinguang Xu ◽  
Zhenggang Zhou
Keyword(s):  
Fracture Toughness ◽  
Carbon Nanotube ◽  
Composite Laminates ◽  
Mode Ii ◽  
Interlaminar Fracture Toughness ◽  
Carbon Fabric ◽  
Interlaminar Fracture ◽  
Fabric Composite

Interlaminar fracture toughness of woven fabric composite laminates with carbon nanotube/epoxy interleaf films

2011 ◽  
Vol 121 (4) ◽  
pp. 2394-2405 ◽  
Author(s):  
Ryan J. Sager ◽  
Patrick J. Klein ◽  
Daniel C. Davis ◽  
Dimitris C. Lagoudas ◽  
Graham L. Warren ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Carbon Nanotube ◽  
Composite Laminates ◽  
Woven Fabric ◽  
Interlaminar Fracture Toughness ◽  
Interlaminar Fracture ◽  
Fabric Composite

Interlaminar Fracture Toughness of Composite Laminate with Splicing Plies

2011 ◽  
Vol 194-196 ◽  
pp. 1697-1702
Author(s):  
Li Liang ◽  
Pu Rong Jia ◽  
Gui Qiong Jiao
Keyword(s):  
Fracture Toughness ◽  
Composite Laminates ◽  
Tensile Testing ◽  
Mode Ii ◽  
Interlaminar Fracture Toughness ◽  
Fiber Reinforced ◽  
Interlaminar Fracture ◽  
Mode Ii Fracture ◽  
Mode Ii Fracture Toughness ◽  
Delamination Failure

Delamination is one of the important damage modes in the fiber-reinforced composite laminates. The interlaminar fracture toughness is the key parameter in delamination failure analysis of composites. The stress analysis by a finite element modeling has shown that the shear stress is very large near the ply splicing area. So the delamination failure is mainly dependent on the mode II fracture toughness. A new way of loading in tensile testing is proposed for the measurement of mode II fracture toughness. Specific specimen with splicing plies has been designed and used for the experiment. Testing study on the carbon-fiber-reinforced laminate with ply splicing was performed. Steady crack propagation has been seen by the tensile testing of the specimen. Mode II fracture toughness GIIC of the laminate has been determined by the experiment data analysis. The experiment and numerical analysis shows that the tensile testing for the measurement of mode II interlaminar fracture toughness is feasible.

scholarly journals Enhancement of the Interlaminar Fracture Toughness of a Carbon-Fiber-Reinforced Polymer Using Interleaved Carbon Nanotube Buckypaper

2021 ◽  
Vol 11 (15) ◽  
pp. 6821
Author(s):  
Yong-Chul Shin ◽  
Seung-Mo Kim
Keyword(s):  
Fracture Toughness ◽  
Shear Strength ◽  
Carbon Nanotube ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Mode Ii ◽  
Interlaminar Fracture Toughness ◽  
Plane Shear ◽  
Interlaminar Fracture ◽  
Reinforced Polymer

In this study, a carbon nanotube (CNT) buckypaper was interleaved in a carbon-fiber-reinforced polymer (CFRP) composite to improve the interlaminar fracture toughness. Interleaving the film of a laminate-type composite poses the risk of deteriorating the in-plane mechanical properties. Therefore, the in-plane shear modulus and shear strength were measured prior to estimating the interlaminar fracture toughness. To evaluate the effect of the buckypaper on the interlaminar fracture toughness of the CFRP, double cantilever beam (DCB) and end notch flexure (ENF) tests were conducted for mode I and mode II delamination, respectively. No significant change was observed for the in-plane shear modulus due to the buckypaper interleaving and the shear strength decreased by 4%. However, the interlaminar fracture toughness of the CFRP increased significantly. Moreover, the mode II interlaminar fracture toughness of the CFRP increased by 45.9%. Optical micrographs of the cross-section of the CFRPs were obtained to compare the microstructures of the specimens with and without buckypaper interleaving. The fracture surfaces obtained after the DCB and ENF tests were examined using a scanning electron microscope to identify the toughening mechanism of the buckypaper-interleaved CFRP.

Improvement of Vibration Damping Capacity and Fracture Toughness in Composite Laminates by the Use of Polymeric Interleaves

1999 ◽  
Author(s):  
Ronald F. Gibson ◽  
Hui Zhao
Keyword(s):  
Fracture Toughness ◽  
Composite Laminates ◽  
Critical Thickness ◽  
Vibration Damping ◽  
Thickness Effect ◽  
Damping Capacity ◽  
Mode Ii ◽  
Interlaminar Fracture Toughness ◽  
Interlaminar Fracture ◽  
Mode Ii Fracture Toughness

Abstract It is shown that simultaneous improvement of vibration damping capacity and interlaminar fracture toughness in composite laminates can be achieved by using polymeric interleaves between the composite laminae. The specific case of Mode II interlaminar fracture toughness and flexural damping capacity of interleaved composite laminates is studied. Graphite/epoxy, E-glass/epoxy and E-glass/polyetherimide composite laminates with polymeric interleaves of several different thicknesses and materials were tested using both the end notch flexure (ENF) test for Mode II fracture toughness and the impulse-frequency response test for flexural damping capacity. The Mode II energy release rate GIIc for all three composites increased linearly with increasing interleaf thickness up to a critical thickness, then dropped off with further increases in thickness. The damping loss factor η for all three composites increased linearly with increasing interleaf thickness up to the maximum thickness. Analytical models for predicting the influence of interleaves on GIIc and η are developed, along with a hypothesis for the critical thickness effect with regard to fracture toughness.

Sign in / Sign up

Export Citation Format

Share Document