scholarly journals Influences of Material Properties and Plasticity on the Stresses around a Pin Joint in Fiber Reinforced Plastics/Metal Hybrid Laminates

2012 ◽  
Vol 38 (6) ◽  
pp. 244-253
Author(s):  
Kyosuke KOSO ◽  
Yoshihiro TAKAO
Keyword(s):  
Material Properties ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Hybrid Laminates ◽  
Fiber Reinforced Plastics

Integrative Simulation für faserverstärkte Bauteile/Integrative simulation for fiber-reinforced components

2021 ◽  
Vol 111 (01-02) ◽  
pp. 49-51
Author(s):  
Heiko Andrä ◽  
Hannes Grimm-Strele ◽  
Matthias Kabel ◽  
Jonathan Köbler ◽  
Dariusz Niedziela ◽  
...  
Keyword(s):  
Production Process ◽  
Material Properties ◽  
Mass Production ◽  
Weight Ratio ◽  
Simulation Method ◽  
Multiscale Simulation ◽  
Fiber Reinforced ◽  
Production Scale ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics

Faserverstärkte Kunststoffe spielen im Leichtbau eine große Rolle. Gründe hierfür sind das gute Gewicht-Steifigkeitsverhältnis sowie die kosteneffizienten und massenproduktionstauglichen Fertigungsverfahren. Für die Entwicklung und Auslegung von kurz- und langfaserverstärkten Bauteilen haben wir eine integrierte skalenübergreifende Simulationskette entwickelt, die den Fertigungsprozess und die daraus erzeugten Materialeigenschaften automatisch berücksichtigt.   Fiber reinforced plastics have a high stiffness to weight ratio and can be cost efficiently produced on a mass production scale by injection or compression molding. Therefore, this type of material plays an important role for producing lightweight components. We developed an integrative multiscale simulation method for the dimensioning of short and long fiber reinforced components, which takes into account the production process as well as the resulting locally varying material properties.

Einsatz von CFK-Fräspartikeln als Füllstoff*/Application of CFRP milling particles as filler - Examinations on the material behavior of fiber-reinforced injection molded parts

2017 ◽  
Vol 107 (07-08) ◽  
pp. 558-563
Author(s):  
E. Prof. Uhlmann ◽  
P. Meier
Keyword(s):  
Material Properties ◽  
Material Behavior ◽  
Fiber Bundles ◽  
Filler Material ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Global Demand ◽  
Molded Parts ◽  
Injection Molded ◽  
Fiber Reinforced Plastics

Der globale Bedarf an faserverstärkten Kunststoffen (CFK) wächst aufgrund seiner herausragenden Eigenschaften gegenüber konventionellen Leichtbauwerkstoffen in der Automobil- sowie Luft- und Raumfahrtbranche stetig an. Für deren Endbearbeitung kommen überwiegend Fräsprozesse zum Einsatz, welche Verschnitt in Form von Faserbündeln im Mikrobereich erzeugen. Ein vielversprechender Ansatz die Ressourceneffizienz zu erhöhen, ist der Einsatz der Fräspartikel als Füllmaterial in Thermoplasten.   Due to the outstanding material properties of fiber reinforced plastics towards conventional lightweight materials, its global demand in the automotive and the aeronautical sector is growing steadily. For the machining of final contours, milling processes are mainly utilized, which create chips in form of fiber bundles in the micro range. A promising approach to increase the resource efficiency is the use of the milling particles as filler material in thermoplastic materials.

scholarly journals Experimentally and analyzed property of carbon fiber reinforced thermoplastic and thermoset plates

2018 ◽  
Vol 7 (3) ◽  
pp. 12 ◽  
Author(s):  
Mitsuhiro Okayasu ◽  
Yuki Tsuchiya ◽  
Hiroaki Arai
Keyword(s):  
Carbon Fiber ◽  
Material Properties ◽  
Polyphenylene Sulfide ◽  
Fatigue Properties ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Thermoset Resin ◽  
Polyether Ether Ketone ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

The tensile and fatigue properties of long unidirectional (UD) and crossply (CR) carbon fiber reinforced plastics (CFRPs) were investigated. The CFRPs in this study were fabricated from 60% CF and various resins: epoxy, polyamide (PA6), polyphenylene sulfide (PPS), and polyether ether ketone (PEEK). The ultimate tensile strength sUTS of Epoxy-CFRP was found to be about twice that of PEEK-CFRP. Relatively high tensile strengths were found for PPS- and PA6-CFRP in the thermoset resin group, although these were still only about 85% of the strength of epoxy-CFRP. The tensile and fatigue strengths of the CR-CFRPs were less than half those of the UD-CFRPs, even though high ductilities were found for the CR-CFRPs. These high ductilities can be attributed to the crosslinking fiber effect and the low proportion of CFs in the loading direction. The sUTS values of CFRPs depend not only on the tensile strengths s and volume fractions V of CF and resin (i.e., through the conventional compound law sUTS = sfiberVfiber + sresinVresin), but also on several material properties, including the wettability of the CF by the resin. On the basis of the material properties, the ultimate tensile strengths of various UD- and CR-CFRPs were well estimated numerically through a statistical analysis, which afforded better estimates than those obtained from the compound law.

Moisture Diffusion in Fiber Reinforced Plastics

1976 ◽  
Vol 98 (1) ◽  
pp. 92-95 ◽  
Author(s):  
E. L. McKague ◽  
J. D. Reynolds ◽  
J. E. Halkias
Keyword(s):  
Relative Humidity ◽  
Material Properties ◽  
Nonlinear Diffusion ◽  
Moisture Absorption ◽  
Moisture Diffusion ◽  
Fiber Reinforced ◽  
Diffusion Behavior ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Diffusion Rates

Fiber-reinforced epoxy laminates were exposed to several combinations of temperature and relative humidity. The purpose was to determine rates and extent of moisture absorption. Diffusion rates varied with temperature, and equilibrium moisture contents varied with relative humidity. Data analysis provided values for the material properties that determined diffusion behavior. A nonlinear diffusion model containing these values was shown to describe and predict absorption behavior for any combination of temperature and humidity. The model also describes desorption and correlates well with experimental data from changing humidity conditions.

Effect of long climatic ageing on the microstructure of the surface of сarbon-fiber-reinforced plastics on base epoxy matrix

2019 ◽  
pp. 157-169 ◽  
Author(s):  
I. S. Deev ◽  
E. V. Kurshev ◽  
S. L. Lonsky
Keyword(s):  
Climatic Factors ◽  
Temperate Climate ◽  
Fiber Reinforced ◽  
Humid Climate ◽  
Climatic Zones ◽  
Reinforced Plastics ◽  
Carbon Plastics ◽  
Fiber Reinforced Plastics ◽  
Determining Factor

Studies and experimental data on the microstructure of the surface of samples of epoxy сarbon-fiber-reinforced plastics that have undergone long-term (up to 5 years) climatic aging in different climatic zones of Russia have been conducted: under conditions of the industrial zone of temperate climate (Moscow, MTsKI); temperate warm climate (Gelendzhik, GTsKI); a warm humid climate (Sochi, GNIP RAS). It is established that the determining factor for aging of carbon plastics is the duration of the complex effect of climatic factors: the longer the period of climatic aging, the more significant changes occur in the microstructure of the surface of the materials. The intensity of the aging process and the degree of microstructural changes in the surface of carbon plastics are affected by the features of the climatic zone. general regularities and features of the destruction of the surface of carbon plastics after a long-term exposure to climatic factors have been established on the basis of the analysis and systematization of the results of microstructural studies.

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