“…This reduction in contact time is caused by the less extent of damage. 42 In the same way, Seyed Yaghoubi et al 43 found that the decrease in contact time is due to the fact that the damage does not fully develop in the sample.Figure 5.Force-time curves of samples with different nanofillers, (a) dry samples, (b) seawater aged samples, (c) maximum impact force.…”
Section: Resultsmentioning
confidence: 85%
“…This reduction in contact time is caused by the less extent of damage. 42 In the same way, Seyed Yaghoubi et al 43 found that the decrease in contact time is due to the fact that the damage does not fully develop in the sample.…”
The effect of low-velocity impact loading and seawater aging on the residual bending properties of glass fiber reinforced polymers (GFRPs) was evaluated. The self-sensing capability of the composite laminates provided by a hybrid combination of multiwall carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) was also examined. The composite laminates were fabricated by RTM with the incorporation of different contents of MWCNTs and GNPs onto the glass fiber surface using the spray coating technique. Impact tests were performed on specimens with and without seawater (SW) aging and then bending specimens were taken to evaluate the after-impact bending behavior. An important reduction in mechanical properties of composite laminates produced by SW aging, caused by plasticization and swelling effects of the polymer matrix, was confirmed. Despite this physical degradation in the mechanical behavior of GFRP composites, a positive synergistic effect of the carbon nanostructures (CNSs) in the composite laminates was observed. Carbon nanofillers cause the maximum force during the impact test increase in comparison with neat specimens; this effect was exhibited by both samples, with and without seawater aging. Previous impact damage reduced flexural strength and flexural modulus of dry (14% and 43%, respectively) and wet samples (15% and 26%, respectively); however, the reduction in flexural strength is slightly smaller in a certain hybrid combination of CNSs. Another important finding was that the self-sensing capability of GFRPs with CNSs was preserved, even after the impact loading and even after the seawater aging, making this technique suitable for structural health monitoring of marine components.
“…This reduction in contact time is caused by the less extent of damage. 42 In the same way, Seyed Yaghoubi et al 43 found that the decrease in contact time is due to the fact that the damage does not fully develop in the sample.Figure 5.Force-time curves of samples with different nanofillers, (a) dry samples, (b) seawater aged samples, (c) maximum impact force.…”
Section: Resultsmentioning
confidence: 85%
“…This reduction in contact time is caused by the less extent of damage. 42 In the same way, Seyed Yaghoubi et al 43 found that the decrease in contact time is due to the fact that the damage does not fully develop in the sample.…”
The effect of low-velocity impact loading and seawater aging on the residual bending properties of glass fiber reinforced polymers (GFRPs) was evaluated. The self-sensing capability of the composite laminates provided by a hybrid combination of multiwall carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) was also examined. The composite laminates were fabricated by RTM with the incorporation of different contents of MWCNTs and GNPs onto the glass fiber surface using the spray coating technique. Impact tests were performed on specimens with and without seawater (SW) aging and then bending specimens were taken to evaluate the after-impact bending behavior. An important reduction in mechanical properties of composite laminates produced by SW aging, caused by plasticization and swelling effects of the polymer matrix, was confirmed. Despite this physical degradation in the mechanical behavior of GFRP composites, a positive synergistic effect of the carbon nanostructures (CNSs) in the composite laminates was observed. Carbon nanofillers cause the maximum force during the impact test increase in comparison with neat specimens; this effect was exhibited by both samples, with and without seawater aging. Previous impact damage reduced flexural strength and flexural modulus of dry (14% and 43%, respectively) and wet samples (15% and 26%, respectively); however, the reduction in flexural strength is slightly smaller in a certain hybrid combination of CNSs. Another important finding was that the self-sensing capability of GFRPs with CNSs was preserved, even after the impact loading and even after the seawater aging, making this technique suitable for structural health monitoring of marine components.
“…Commonly used standards in China including national standards (GB), aviation standards (HB) and the American materials association standard (ASTM D), etc., respectively for FMLs performance test and index evaluation method has carried on the detailed regulation, scholars on the basis of related experiments, and constantly optimize and improve the experimental equipment, method, in order to obtain more consistent with the engineering application effect [12][13][14][15]. Based on ASTM D standard, this paper introduces the method of common performance test and index evaluation of FMLs, focuses on the latest technology, method and progress, and analyzes its advantages and disadvantages, and briefly discusses the main development direction of current FMLs performance test method and index evaluation, FMLs performance test method and index evaluation provide reference and research direction.…”
With its excellent fatigue performance and high damage tolerance and other irreplaceable advantages, FMLs have gradually increased the demand in aerospace, rail transit, ship and other fields, and have put forward higher requirements for the speed and accuracy of its performance test and index evaluation. In this paper, the methods of performance test, analysis and index evaluation of FMLs are introduced from three aspects with carbon fiber and composite materials, mechanical properties and numerical simulation technology, details the common test methods, the latest technology and progress, and analyzes their advantages and disadvantages, so as to provide direction and reference for the performance test method and index evaluation of FMLs. Finally, the main development directions of the current performance testing methods and index evaluation of FMLs are briefly discussed.
“…In other respects, hybridizing metal layers with composites has paved the way for a revolution in many engineering applications by replacing their heavier counterparts. 21,22 Metal/composite laminates also give an improvement of fatigue response, resistance to impact loads, corrosion and crack growth. 23 Due to the several advantages, such as thermoformable feature, 24 recyclability, 25 ease of processing and good corrosion resistance, 26 the demand for thermoplastic composites has been growing day by day.…”
Multimaterial designs consisting of metallic and polymeric material are aimed to reach high lightweight potential. This study presents novel hybrid structures with different interlayer of thermoplastic composites not previously reported in the literature for multi-laminated composites. The metal-polymer-metal hybrids comprise of polyamide 6 (PA6) or polyamide 6,6 (PA66) composite reinforced with 15% of short glass fiber as a sandwich layer. AA7075/AA2124-SiC-17p composite laminates are bonded through hot pressing connection. Mechanical properties of the structures are experimentally investigated from the point of maximum shear strength between dissimilar laminates, resistance to fracture and energy absorbing capacity. Scanning electron microscope (SEM) analysis of fracture surfaces is carried out after mechanical characterization. Short beam three-point-bending tests show that the laminate on which the load is applied is of great importance for the asymmetric hybrid structures. Shear dominant failure is only visible when the bending load is performed from the AA7075 surface. Single-edge notched bending (SENB) test results indicate that there is no significant difference between two configurations in terms of the Mode-I fracture toughness. V-notch Charpy impact tests reveal that the interlayer of PA6 composite contributes to a 13.15% more absorbed energy than that of the PA66 interlayer.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
