Temperature-dependent interlaminar shear strength of unidirectional continuous fiber-reinforced thermoplastic profiles

2021 ◽  
Vol 255 ◽  
pp. 112959
Author(s):  
A. Maier ◽  
N. Schramm ◽  
L. Kroll
Keyword(s):  
Shear Strength ◽  
Interlaminar Shear Strength ◽  
Fiber Reinforced ◽  
Continuous Fiber ◽  
Temperature Dependent ◽  
Interlaminar Shear

The effect of fiber-reinforced interleaves on the interlaminar shear strength of continuous glass fiber-reinforced polypropylene laminates

2013 ◽  
Vol 33 (3) ◽  
pp. 221-227
Author(s):  
Li Fang ◽  
Xuwu Li ◽  
Xiaodong Zhou
Keyword(s):  
Shear Strength ◽  
Glass Fiber ◽  
Interlaminar Shear Strength ◽  
Test Results ◽  
Fiber Reinforced ◽  
Short Glass Fiber ◽  
Glass Fiber Reinforced ◽  
Long Glass Fiber ◽  
Interlaminar Shear ◽  
Short Glass

Abstract In this article, polypropylene (PP), short glass fiber-reinforced polypropylene (SFT-PP), and direct long glass fiber-reinforced polypropylene (DLFT-PP) interleaves were added as interleaves between fabrics during laminated molding to improve the interlaminar shear strength (ILSS). The test results showed that the ILSS was obviously improved. Furthermore, DLFT-PP interleaves were preheated to melt the PP before laminated molding and were then immediately placed between two fabrics to make the melted PP enter the gaps of the fabric and more fibers were used to further improve the ILSS. As expected, the ILSS increased.

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.

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