Theoretical study and physical tests of circular hole-edge stress concentration in long glass fiber reinforced polypropylene composite

2020 ◽  
Vol 236 ◽  
pp. 111884 ◽  
Author(s):  
Shuyong Duan ◽  
Zhanming Zhang ◽  
Kai Wei ◽  
Fang Wang ◽  
Xu Han
Keyword(s):  
Stress Concentration ◽  
Glass Fiber ◽  
Circular Hole ◽  
Theoretical Study ◽  
Polypropylene Composite ◽  
Hole Edge ◽  
Glass Fiber Reinforced ◽  
Long Glass Fiber ◽  
Edge Stress ◽  
Physical Tests

The Effect of Defect Locations on the Stress Distribution and Crack Initiation in Monolithic Aluminum vs. GLARE Hybrid Composite

2005 ◽  
Vol 486-487 ◽  
pp. 354-357
Author(s):  
Cheol Woong Kim ◽  
Sam Hong Song ◽  
Dong Joon Oh
Keyword(s):  
Stress Concentration ◽  
Stress Distribution ◽  
Crack Initiation ◽  
Glass Fiber ◽  
Circular Hole ◽  
Hybrid Composite ◽  
Defect Location ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Laminates ◽  
Made In

This paper investigates the effect of the defect location on the stress concentration, the stress distribution, and the crack initiation behavior when the defects were made in the vicinity of the circular hole in the monolithic aluminum and the glass fiber reinforced laminates (GLARE). As the defect location in the vicinity of the circular hole was changed from ° = 90 4 q to ° = 0 1 q , the stress concentration was increased. Generally, the stress concentration of GLARE was about 15% greater than that of the monolithic aluminum. When the defect was at ° = 30 2 q , Multi Site Damage (MSD) crack was found in the monolithic aluminum, but just the main cracks existed in GLARE. The delamination instead of MSD crack was made in GLARE, and it resulted in the prevention against the second crack initiation.

Rubber-Toughened Long Glass Fiber Reinforced Thermoplastic Composite

2012 ◽  
Vol 2 (4) ◽  
pp. 47-58
Author(s):  
Fabrizio Quadrini ◽  
Claudia Prosperi ◽  
Loredana Santo
Keyword(s):  
Glass Fiber ◽  
Thermoplastic Composite ◽  
Dissipated Energy ◽  
Powder Size ◽  
Damping Properties ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Rubber Toughened ◽  
Long Glass Fiber ◽  
Rubber Particles

A rubber-toughened thermoplastic composite was produced by alternating long glass fiber reinforced polypropylene prepregs and rubber particles. Several composite laminates were obtained by changing the number of plies, the rubber powder size distribution, and the stacking sequence. Quasi-static mechanical tests (tensile and flexure) and time dependent tests (dynamic mechanical analysis and cyclic flexure) were carried out to evaluate strength and damping properties. As expected, 10 wt% rubber-filled laminates showed lower strengths than rubber-free laminates but the effect of the rubber on the composite damping properties was evident. At low rates, the rubber particles can also double the dissipated energy under cyclic loading, even if this effect disappears by increasing the test rate.

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