scholarly journals Springback Behavior of Carbon-Fiber-Reinforced Plastic Laminates With Metal Cover Layers in V-Die Bending

2016 ◽  
Author(s):  
Marlon Hahn ◽  
Christian Weddeling ◽  
Nooman Ben Khalifa ◽  
Arash Shabaninejad
Keyword(s):  
Carbon Fiber ◽  
Thickness Distribution ◽  
Fiber Reinforced ◽  
Reinforced Plastic ◽  
Fiber Metal Laminate ◽  
Carbon Fiber Reinforced ◽  
Fiber Metal ◽  
Metal Layers ◽  
Springback Behavior ◽  
Suitable Process

The V-die bending of a carbon-fiber reinforced thermoplastic laminate bonded to thin cover layers made of microalloyed steel was investigated. Such hybrid semi-finished products are gaining importance in transport-related lightweight designs. Experiments were conducted for different forming temperatures and dwell times to determine suitable process parameters. The punch radius was varied to evaluate its influence on the springback/negative springback of the fiber-metal laminate (FML). The results, which are in good accordance with a simple analytical model, showed that the solidification of the composite core can compensate for the springback of the metal layers. Micrographs further revealed that the fiber orientation can affect the thickness distribution in the bend area.

scholarly journals Springback Behavior of Carbon-Fiber-Reinforced Plastic Laminates With Metal Cover Layers in V-Die Bending

2016 ◽  
Vol 138 (12) ◽  
Author(s):  
Marlon Hahn ◽  
Nooman Ben Khalifa ◽  
Christian Weddeling ◽  
Arash Shabaninejad
Keyword(s):  
Carbon Fiber ◽  
Thickness Distribution ◽  
Fiber Reinforced ◽  
Reinforced Plastic ◽  
Fiber Metal Laminate ◽  
Carbon Fiber Reinforced ◽  
Fiber Metal ◽  
Metal Layers ◽  
Springback Behavior ◽  
Suitable Process

The V-die bending of a carbon-fiber-reinforced thermoplastic laminate bonded to thin cover layers made of microalloyed steel was investigated. Such hybrid semifinished products are gaining importance in transport-related lightweight designs. Experiments were conducted for different forming temperatures and dwell times to determine suitable process parameters. The punch radius was varied to evaluate its influence on the springback/negative springback of the fiber–metal laminate (FML). The results, which are in good accordance with a simple analytical model, showed that the solidification of the composite core can compensate for the springback of the metal layers. Micrographs further revealed that the fiber orientation can affect the thickness distribution in the bend area.

Studying mechanical characteristics of fiber-metal laminate based on aluminum sheets and layers of carbon fiber reinforced plastics

2019 ◽  
pp. 86-96
Author(s):  
S. I. Voinov ◽  
G. F. Zhelezina ◽  
A. V. Ilichev ◽  
N. A. Solovieva
Keyword(s):  
Carbon Fiber ◽  
Polymer Composite Material ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Aluminum Sheets ◽  
Fiber Metal Laminate ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
Fiber Metal

Results of tensile strength test of layered metal-polymer composite material on the basis of aluminum alloy sheets and layers of carbon fiber reinforced plastics were analyzed. The efficiency of complex anticorrosive protection from the influence of external factors was studied.

Optimization of Corrosive Properties of Carbon Fiber Reinforced Aluminum Laminates due to Integration of an Elastomer Interlayer

2017 ◽  
Vol 742 ◽  
pp. 287-293 ◽  
Author(s):  
Matthias Stoll ◽  
Franziska Stemmer ◽  
Sergej Ilinzeer ◽  
Kay André Weidenmann
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Galvanic Corrosion ◽  
Salt Spray ◽  
Neutral Salt ◽  
Fiber Reinforced ◽  
Fiber Metal Laminates ◽  
Fiber Metal Laminate ◽  
Carbon Fiber Reinforced ◽  
Fiber Metal

Fiber-Metal-Laminates (FML) show superior dynamic mechanical properties combined with low densities. The mechanical performance of for example commercially available fiber-metal-laminate, glass laminate aluminum reinforced epoxy, can be improved by the substitution of glass fibers with carbon fibers. However, carbon fiber reinforced aluminum laminate introduces a mismatch of coefficients of thermal expansion and the possibility of galvanic corrosion. The fiber-metal-laminate is altered by the integration of an elastomer interlayer which is desired to solve both problems. The high electrical resistance is supposed to inhibit the corrosion. This study focuses on the effect of galvanic corrosion caused by neutral salt spray tests on fiber-metal-laminates, the influence of an elastomer interlayer and the quantification of the residual mechanical properties. The galvanic corrosion affects the interfaces of the laminates, therefore in this study edge shear tests and flexural tests were carried out to quantify the residual properties and thereby the corrosive damage. The elastomer interlayer was found to inhibit galvanic corrosion in the salt spray chamber, whereas the fiber-metal-laminate without interlayer showed corrosive damage. Furthermore, the mechanical properties of the fiber-metal-laminate with elastomer interlayer remained constant after the corrosion tests, whilst the fiber-metal-laminate’s properties decreased with corrosive loads.

scholarly journals Stressing State Analysis of Reinforced Concrete Beam Strengthened by CFRP Sheet with Anchoring Device

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 576
Author(s):  
Liang Luo ◽  
Jie Lai ◽  
Jun Shi ◽  
Guorui Sun ◽  
Jie Huang ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Strain Distribution ◽  
Carbon Fiber Reinforced Plastic ◽  
Rc Beams ◽  
Fiber Reinforced ◽  
Strain Distribution Pattern ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Cfrp Sheet ◽  
Carbon Fiber Reinforced

This paper investigates the working performance of reinforcement concrete (RC) beams strengthened by Carbon-Fiber-Reinforced Plastic (CFRP) with different anchoring under bending moment, based on the structural stressing state theory. The measured strain values of concrete and Carbon-Fiber-Reinforced Plastic (CFRP) sheet are modeled as generalized strain energy density (GSED), to characterize the RC beams’ stressing state. Then the Mann–Kendall (M–K) criterion is applied to distinguish the characteristic loads of structural stressing state from the curve, updating the definition of structural failure load. In addition, for tested specimens with middle anchorage and end anchorage, the torsion applied on the anchoring device and the deformation width of anchoring device are respectively set parameters to analyze their effects on the reinforcement performance of CFRP sheet through comparing the strain distribution pattern of CFRP. Finally, in order to further explore the strain distribution of the cross-section and analyze the stressing-state characteristics of the RC beam, the numerical shape function (NSF) method is proposed to reasonably expand the limited strain data. The research results provide a new angle of view to conduct structural analysis and a reference to the improvement of reinforcement effect of CFRP.

Study on the mechanism of inhomogeneous microdamage in short-pulse laser processing of carbon fiber reinforced plastic

2021 ◽  
pp. 073168442098359
Author(s):  
Luyao Xu ◽  
Jiuru Lu ◽  
Kangmei Li ◽  
Jun Hu
Keyword(s):  
Carbon Fiber ◽  
Pulse Energy ◽  
Short Pulse ◽  
Heterogeneous Material ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Processing Efficiency ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced

In this article, a micro-heterogeneous material simulation model with carbon fiber and resin phase about laser ablation on carbon fiber reinforced plastic (CFRP) is established by Ansys. The ablation process of CFRP by nanosecond ultraviolet laser is simulated, and the mechanism of pulse energy and spot spacing on the heat-affected zone (HAZ) is studied, then the process parameters are optimized with the goal of HAZ size and processing efficiency, and finally the validity of the model is verified by experiments. It is found that the residual gradient and the width of the radial HAZ increase with the increase of the spot spacing, and the width of the axial HAZ decreases slightly with the increase of the spot spacing, which indicates the existence of the optimal spot spacing. Second, the ablation depth increases with the increase of the pulse energy, and the carbon fiber retains a relatively complete degree of exposure when the pulse energy is low, which has a certain guiding significance for the cleaning and bonding of CFRP.

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