Comparative Studies of Crushing Behavior of Various Fiber Reinforced Skin Polyurethane Foam Cored Composite Sandwich Structures

2012 ◽  
pp. 387-394
Author(s):  
K. V. Sharma ◽  
M. Sripathy
Keyword(s):  
Polyurethane Foam ◽  
Comparative Studies ◽  
Sandwich Structures ◽  
Fiber Reinforced ◽  
Composite Sandwich ◽  
Composite Sandwich Structures ◽  
Crushing Behavior

Comparing the Impact Response of 3D Fiber Reinforced Foam Core with Monolithic Foam Core in Composite Sandwich Structures

2021 ◽  
Author(s):  
Michael J. Wu ◽  
Steffen Tai ◽  
Jacob Rome ◽  
Vinay K. Goyal ◽  
Zachary T. Kier ◽  
...  
Keyword(s):  
Sandwich Structures ◽  
Impact Response ◽  
Foam Core ◽  
Fiber Reinforced ◽  
Composite Sandwich ◽  
Composite Sandwich Structures ◽  
The Impact

scholarly journals Fabrication and Characterization of Fiber-Reinforced Composite Sandwich Structures Obtained by Fused Filament Fabrication Process

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 601
Author(s):  
George Razvan Buican ◽  
Sebastian-Marian Zaharia ◽  
Mihai Alin Pop ◽  
Lucia-Antoneta Chicos ◽  
Camil Lancea ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Sandwich Structures ◽  
Mechanical Tests ◽  
Fiber Reinforced ◽  
Fused Filament Fabrication ◽  
Fiber Reinforced Composite ◽  
Three Point Bending ◽  
Composite Sandwich ◽  
Composite Sandwich Structures ◽  
Reinforced Composite

The application of fused filament fabrication processes is rapidly expanding in many domains such as aerospace, automotive, medical, and energy, mainly due to the flexibility of manufacturing structures with complex geometries in a short time. To improve the mechanical properties of lightweight sandwich structures, the polymer matrix can be strengthened with different materials, such as carbon fibers and glass fibers. In this study, fiber-reinforced composite sandwich structures were fabricated by FFF process and their mechanical properties were characterized. In order to conduct the mechanical tests for three-point bending, tensile strength, and impact behavior, two types of skins were produced from chopped carbon-fiber-reinforced skin using a core reinforced with chopped glass fiber at three infill densities of 100%, 60%, and 20%. Using microscopic analysis, the behavior of the breaking surfaces and the most common defects on fiber-reinforced composite sandwich structures were analyzed. The results of the mechanical tests indicated a significant influence of the filling density in the case of the three-point bending and impact tests. In contrast, the filling density does not decisively influence the structural performance of tensile tests of the fiber-reinforced composite sandwich structures. Composite sandwich structures, manufactured by fused filament fabrication process, were analyzed in terms of strength-to-mass ratio. Finite element analysis of the composite sandwich structures was performed to analyze the bending and tensile behavior.

scholarly journals The energy absorption behavior of novel composite sandwich structures reinforced with trapezoidal latticed webs

2021 ◽  
Vol 60 (1) ◽  
pp. 503-518
Author(s):  
Juan Han ◽  
Lu Zhu ◽  
Hai Fang ◽  
Jian Wang ◽  
Peng Wu
Keyword(s):  
Bearing Capacity ◽  
Energy Absorption ◽  
Sandwich Structure ◽  
Ultimate Load ◽  
Sandwich Structures ◽  
Elastic Displacement ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Composite Sandwich ◽  
Composite Sandwich Structures

Abstract This article proposed an innovative composite sandwich structure reinforced with trapezoidal latticed webs with angles of 45°, 60° and 75°. Four specimens were conducted according to quasi-static compression methods to investigate the compressive behavior of the novel composite structures. The experimental results indicated that the specimen with 45° trapezoidal latticed webs showed the most excellent energy absorption ability, which was about 2.5 times of the structures with vertical latticed webs. Compared to the traditional composite sandwich structure, the elastic displacement and ultimate load-bearing capacity of the specimen with 45° trapezoidal latticed webs were increased by 624.1 and 439.8%, respectively. Numerical analysis of the composite sandwich structures was carried out by using a nonlinear explicit finite element (FE) software ANSYS/LS-DYNA. The influence of the thickness of face sheets, lattice webs and foam density on the elastic ultimate load-bearing capacity, the elastic displacement and initial stiffness was analyzed. This innovative composite bumper device for bridge pier protection against ship collision was simulated to verify its performance. The results showed that the peak impact force of the composite anti-collision device with 45° trapezoidal latticed webs would be reduced by 17.3%, and the time duration will be prolonged by about 31.1%.

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