scholarly journals Interlaminar Shear Strength of Multi-walled Carbon Nanotube and Carbon Fiber Reinforced, Epoxy – Matrix Hybrid Composite

2014 ◽  
Vol 6 ◽  
pp. 1336-1343 ◽  
Author(s):  
K. Chandra Shekar ◽  
B. Anjaneya Prasad ◽  
N. Eswara Prasad
Keyword(s):  
Shear Strength ◽  
Carbon Nanotube ◽  
Carbon Fiber ◽  
Hybrid Composite ◽  
Epoxy Matrix ◽  
Interlaminar Shear Strength ◽  
Fiber Reinforced ◽  
Multi Walled Carbon Nanotube ◽  
Carbon Fiber Reinforced ◽  
Interlaminar Shear

Effect of cure pressure on microstructure and interlaminar shear strength properties of carbon fiber–reinforced plastics with microwave curing

2017 ◽  
Vol 30 (9) ◽  
pp. 1084-1093 ◽  
Author(s):  
Xiaoping Chen ◽  
Lihua Zhan ◽  
Yongwei Pu ◽  
Minghui Huang ◽  
Xintong Wu ◽  
...  
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Threshold Value ◽  
Interlaminar Shear Strength ◽  
Fiber Reinforced ◽  
Pressure Stage ◽  
Microwave Curing ◽  
Carbon Fiber Reinforced ◽  
Interlaminar Shear ◽  
Curing Pressure

Under a given microwave curing process, different curing pressures were applied to the carbon fiber–reinforced epoxy resin pre-impregnated laminates. Nondestructive testing and microscopic analysis were used to assess the effect of curing pressure on the interlaminar shear strength (ILSS) of the carbon fiber–reinforced plastic (CFRP) laminates. Results showed that in the low curing pressure stage (below 0.4 MPa), the porosity and ILSS of the components were reduced substantially as the curing pressure increased. In the high curing pressure stage (above 0.4 MPa), the ILSS only increased by 2.2% or so and the porosity and ILSS were no longer sensitive to the pressure, which indicated there was a threshold value (0.4 MPa) of mechanical property for forming the CFRP by the microwave curing. Above the threshold value, the curing pressure should be sufficient to allow the volatile gases to dissolve in the resin, thereby eliminating the generation of voids fundamentally, and the effect of curing pressure on the quality of composites was becoming small. These results could give process engineers some basic references for eliminating the voids in the CFRP component, so that they could reach a balance between preserving the mechanical properties and reducing the curing pressure in a cost-effective way.

Experimental study on the carbon-fiber-reinforced polymer–steel interfaces based on carbon-fiber-reinforced polymer delamination failures and hybrid failures

2020 ◽  
Vol 23 (11) ◽  
pp. 2247-2260 ◽  
Author(s):  
Yu-Yang Pang ◽  
Gang Wu ◽  
Zhi-Long Su ◽  
Xiao-Yuan He
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Failure Mode ◽  
Interlaminar Shear Strength ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced ◽  
Interlaminar Shear

The failure mode is crucial to the interfacial bond performance between carbon-fiber-reinforced polymer plates and steel substrates. Existing studies mainly focused on the cohesive failures in the adhesive; however, research on other types of failure modes is still limited. In this article, a series of single-shear bonded joints are prepared to investigate the bond behaviors of the carbon-fiber-reinforced polymer–steel interfaces based on carbon-fiber-reinforced polymer delamination failures and hybrid failures. Three kinds of adhesives—which have different tensile strengths and elastic moduli—and two kinds of carbon-fiber-reinforced polymer plates—which have different interlaminar shear strengths—are used to evaluate the influencing factors of carbon-fiber-reinforced polymer–steel interfaces. The three-dimensional digital image correlation technique is applied to measure the strain and the displacement on the surface of each specimen. The obtained test results include the strain distribution, the ultimate load, the failure mode, the load–slip curves, and the bond–slip relationships. For the carbon-fiber-reinforced polymer delamination mode, the results show that the load at the debonding stage is closely related to the interlaminar shear strength of the carbon-fiber-reinforced polymer plate, and the higher the interlaminar shear strength is, the greater the load. However, for the hybrid mode, the load of the whole test process is independent of the interlaminar shear strength of the carbon-fiber-reinforced polymer plate.

The effects of sample preparation on the interlaminar shear strength test values of unidirectional carbon fiber-reinforced epoxy composites

2019 ◽  
Vol 27 (4) ◽  
pp. 228-234 ◽  
Author(s):  
Ying Sun ◽  
Yonggen Lu ◽  
Xiaoye Guo
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Sample Preparation ◽  
Vacuum Treatment ◽  
Interlaminar Shear Strength ◽  
Fiber Content ◽  
Epoxy Composites ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced ◽  
Interlaminar Shear

Interlaminar shear strength (ILSS) is an important indicator to measure the interfacial adhesion between the fiber and the matrix. The ILSS values of the unidirectional carbon fiber-reinforced epoxy composites prepared under different process conditions were investigated. Three main factors in the sample preparation, namely pressure in the molding process, fiber content of the composite, and whether to add vacuum treatment in the sample preparation process, were probed in this work. We found that the samples prepared under high pressure presented low ILSS values, but the sample prepared without pressure was not suitable for testing and the optimum pressure was 0.5 MPa. The sample prepared at lower fiber content was also not suitable for testing. However, the ILSS value decreased when the fiber content was further increased and the optimum fiber content was 60 wt%. The ILSS value was significantly increased by adding the process of vacuum treatment in the preparation.

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