Effect of Lightning Strike on the Compressive Strength of Carbon Fiber Reinforced Polymers—A Finite Element Study

2020 ◽  
Author(s):  
T. M. DHANYA ◽  
C. S. YERRAMALLI
Keyword(s):  
Finite Element ◽  
Compressive Strength ◽  
Carbon Fiber ◽  
Fiber Reinforced Polymers ◽  
Lightning Strike ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Finite Element Study ◽  
Element Study

scholarly journals Seismic Analysis of Reinforced Concrete Pier Strengthened by Carbon Fiber Reinforced Polymers

2020 ◽  
Vol 23 (3) ◽  
pp. 313-318
Author(s):  
Sarah Fadhil Abass ◽  
Bassman R. Muhammad ◽  
Qais A. Hasan ◽  
Qais A. Hasan
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Seismic Analysis ◽  
Bridge Pier ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Carbon Fiber Reinforced

In this vast world after an earthquake lessons are learned; many strategies have been considered in order to achieve a proper seismic strength capacity.The aim of this paper is studying the seismic behavior of a typical reinforced concrete bridge pier in Iraq and implementing a proper technique of strengthening in order to fix any damage that had happened.Structure of a full scale three-dimensional finite element model was used in order to simulate a reinforced concrete pier via the computer software ABAQUS/CAE 2017 using concrete plasticity damage model (CDP).Under the action of Halabja earthquake, which was recorded at city of Halabja in Iraq on 12 November 2017, the behavior of model was traced, analyzed and the resulted damages were managed.The finite element analysis results indicated that the proposed configuration of carbon fiber reinforced polymers laminates substantially increases the lateral load strength and deformation capacity of the bridge pier

Non-Traditional Shape Variations on Bistable Carbon Fiber Reinforced Polymer Laminates

2020 ◽  
Author(s):  
Christopher M. Nelon ◽  
Jonathan Figueroa ◽  
Oliver J. Myers ◽  
Aaron Shepard
Keyword(s):  
Finite Element ◽  
Carbon Fiber ◽  
Large Scale ◽  
Fiber Reinforced Polymers ◽  
Small Scale ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Carbon Fiber Reinforced ◽  
Polymer Laminates

Abstract The ability of a material to display two equilibrium states, called bistability, has been previously observed in carbon fiber reinforced polymers (CFRPs). For bistability to occur, the laminate must consist of an unsymmetric layup about its midplane which generates internal residual stress from thermal contraction. Prior studies have observed bistability in CFRPs with small-scale rectangular geometries where all sides were less than 250 mm. The aim of this paper is to demonstrate the existence of bistability in large-scale CFRPs with rectangular and non-rectangular geometries. Experiments and finite element analyses were conducted to determine the viability of bistability in large-scale CFRPs where at least one length aspect of the specimen was greater than or equal to 304.8 mm. Specimens whose shapes included rectangles, deltoids, triangles, and circles, were fabricated and tested to determine the presence of bistability and the associated curvature for each cured equilibrium state. Rectangular specimens had a side length of 914.4 mm and widths that varied from 177.8 to 457.2 mm. For the deltoids, triangles, and circles, one length aspect (i.e. the height, hypotenuse, and diameter, respectively) equaled 304.8 mm. Finite element models were created to compare the equilibrium shapes’ curvatures and displacements with the experimental laminates; the existence of bistability was also examined using a nondimensionalized bifurcation plot. Experimentally, bistability was found to occur for the fabricated laminates up to six plies. As the studied laminates could be considered thin, they displayed cylindrical cured shapes. The non-traditional shaped CFRPs followed bistability trends found for traditional, small-scale, rectangular laminates. An inverse relationship between the ply count and curvature was exhibited for the large-scale, rectangular laminates; curvature decreased as the number of plies in the laminate increased.

Metallization of Carbon Fiber Reinforced Polymers for Lightning Strike Protection

2018 ◽  
Vol 27 (10) ◽  
pp. 5205-5211 ◽  
Author(s):  
Hanqing Che ◽  
Martin Gagné ◽  
P. S. M. Rajesh ◽  
Jolanta E. Klemberg-Sapieha ◽  
Frederic Sirois ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Fiber Reinforced Polymers ◽  
Lightning Strike ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Carbon Fiber Reinforced

Cold Spray of Mixed Sn-Zn and Sn-Al Powders on Carbon Fiber Reinforced Polymers

2018 ◽  
Vol 941 ◽  
pp. 1892-1897
Author(s):  
Han Qing Che ◽  
André Liberati ◽  
Phuong Vo ◽  
Stephen Yue
Keyword(s):  
Carbon Fiber ◽  
Cold Spray ◽  
Deposition Efficiency ◽  
Fiber Reinforced Polymers ◽  
Lightning Strike ◽  
Metal Powders ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Mixed Metal

Carbon fiber reinforced polymers (CFRPs) have been increasingly used in the latest generations of aircraft and helicopters for lightweight purposes, but this leaves vulnerability against lightning strike. Cold spray is one coating approach to metallize the polymers, thus making them lightning strike proof. It has been reported that direct cold spray of metals onto CFRP is difficult. However, research at McGill University has shown that tin coatings can be cold sprayed on CFRP, but the deposition efficiency is very low. In this work, aluminum and zinc powders were mixed with tin to investigate the effect of mixing on deposition efficiency of the coating. The mixed metal powders were cold sprayed on CFRP with a low-pressure cold spray system at various conditions. It was found that the addition of aluminum or zinc resulted led to increased deposition efficiencies compared to pure tin, but there are many differences in the details of the effect of Al and Zn additions on the deposition characteristics. The deposition mechanism of the mixed metal powders on CFRP is discussed, and the effect of mixing powders on the deposition efficiency is evaluated.

Effect of Secondary Component Properties when Cold Spraying Mixed Metal Powders on Carbon Fiber Reinforced Polymers

2021 ◽  
Author(s):  
Andre C. Liberati ◽  
Hanqing Che ◽  
Stephen Yue ◽  
Phuong Vo
Keyword(s):  
Carbon Fiber ◽  
Cold Spraying ◽  
Secondary Component ◽  
Fiber Reinforced Polymers ◽  
Lightning Strike ◽  
Metal Powders ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Carbon Fiber Reinforced

Abstract In previous studies at McGill University; tin was successfully cold sprayed onto carbon fiber reinforced polymers (CFRPs). A “crack-filling” mechanism was described as the deposition mechanism that allowed deposition of tin onto the CFRP. Improving the coating conductivity for lightning strike protection (LSP) purposes was achieved by adding other metal powders (aluminum; copper; zinc) to tin and cold spraying on the CFRP. At the same time; it was noticed that the addition of this secondary component (SC) provided an increase in deposition efficiency (DE); tamping was initially hypothesized to explain this improvement; thus prompting a study solely on the effect of SC hardness; which is reported elsewhere in this conference. However; it is recognised that other powder characteristics may also be influencing the DE. Thus; in this study; SCs with a wider variety of particle sizes; morphologies; densities and hardness values were mixed with tin and sprayed on CFRPs. The effect of SC properties on tin deposition is discussed and an optimal combination of SC properties for cold spraying of tin is suggested.

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