Journal ArticleDOI
Hygroscopic aspects of epoxy/carbon fiber composite laminates in aircraft environments
TLDR
In this article, various hygroscopic effects of such parameters as hygrothermal temperature, matrix volume ratio, void volume ratio (Vv), specimen thickness, lay-up sequence and internal stress were investigated for epoxy/carbon fiber composite laminates.Abstract:
In this study, various hygroscopic effects of such parameters as hygrothermal temperature, matrix volume ratio (Vm), void volume ratio (Vv), specimen thickness, lay-up sequence and internal stress were investigated for epoxy/carbon fiber composite laminates. The specimen thickness and lay-up sequence had little effect on the through-the-thickness water absorption behavior of composite laminates, but the other parameters affected the moisture absorption rate and equilibrium water uptake in different ways and intensities. The glass transition temperature of composite laminates was strongly affected and linearly decreased by the quantity of equilibrium water uptake. A characteristic length of moisture migration through the unidirectional laminates was proposed as a function of fiber angle to the exposed laminate surface. In this approach, the fibers imbedded in the matrix were assumed to act as a barrier to the penetrating water molecules, and the developed model was well compared with the experimental results.read more
Citations
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Journal ArticleDOI
Temperature effect during humid ageing on interfaces of glass and carbon fibers reinforced epoxy composites.
TL;DR: An attempt has been made here to evaluate the deleterious effect of temperature on shear strength of carbon/epoxy and glass/ep oxygen composites during hygrothermal conditionings and the effectiveness of the relaxation process in the nullification of environmentally-induced damage in the composites.
Journal ArticleDOI
Voids in fiber-reinforced polymer composites: A review on their formation, characteristics, and effects on mechanical performance:
TL;DR: In this article, the most studied type of manufacturing defects, voids, form very often in processing of fiber-reinforced composites and have a considerable influence on physical and thermomechanical properties.
Journal ArticleDOI
Degradation of Carbon Fiber-Reinforced Epoxy Composites by Ultraviolet Radiation and Condensation
TL;DR: In this paper, the degradation of an IM7/997 carbon fiber-reinforced epoxy exposed to ultraviolet radiation and/or condensation has been characterized based on observations of physical and chemical degradation, and it has been established that these environments operate in a synergistic manner that causes extensive erosion of the epoxy matrix, resulting in a reduction in mechanical properties.
Journal ArticleDOI
Thermal stability and water uptake of high performance epoxy layered silicate nanocomposites
TL;DR: In this paper, an octadecyl ammonium modified smectite clay was used to synthesize intercalated and ordered exfoliated layered silicate nanocomposites based on three different epoxy resins of different structures and functionalities.
Journal ArticleDOI
Recent progress on natural fiber hybrid composites for advanced applications: A review
Mokgaotsa Jonas Mochane,Teboho Clement Mokhena,T. H. Mokhothu,Asanda Mtibe,Emmanuel Rotimi Sadiku,Suprakas Sinha Ray,Idowu David Ibrahim,O.O. Daramola +7 more
TL;DR: In this paper, the authors cover recent developments from 2013-up to date on hybrid composites, based on natural fibers with other fillers, and the current challenges are also presented.
References
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Book
The mathematics of diffusion
TL;DR: Though it incorporates much new material, this new edition preserves the general character of the book in providing a collection of solutions of the equations of diffusion and describing how these solutions may be obtained.
Journal ArticleDOI
Moisture Absorption and Desorption of Composite Materials
Chi-Hung Shen,George S. Springer +1 more
TL;DR: In this paper, a series of tests using unidirectional and π/4 Graphite T-300 Fiberite 1034 composites were performed in the temperature range 300-425 K with the material submerged both in moist air (humidity 0 to 100%) and in water.
Journal ArticleDOI
Thermally reversible hydrogels: II. Delivery and selective removal of substances from aqueous solutions
TL;DR: Hydrogels have been synthesized which exhibit a lower critical solution temperature (LCST) and which shrink and deswell in aquous solutions when the temperature is raised through their LCST, and how a specific binding ligand may be incorporated into the gel for selective binding (and removal or recovery) of specific solutes in aqueous solutions is shown.
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