Abstract
The effects of hybridization on the flexural properties of interlayer and intralayer Carbon/Glass (C/G) composites were explored in this work. First, the theoretical analysis of stress distribution on interlayer hybrid composites was discussed. The experimental results showed that the layer structure is the critical factor affecting the flexural properties for interlayer hybrid composites, and the mixed ratio has no obvious impact. Since the carbon fiber is distributed at the top or bottom surface, the interlayer composites can obtain the maximum flexural modulus. Some structures can even achieve the same modulus as the pure carbon composites, and an excellent flexural strength can be attained with the carbon fiber located in the bottom layer. In terms of the intralayer hybrid composites, the fracture strain, flexural modulus, and flexural strength basically change linearly as the glass fiber content increases, which is consistent with the calculated values via the rule of mixture (ROM). Additionally, the C/G mixed ratio has a decisive effect on the flexural properties of intralayer hybrid composites; however, they are affected weakly by the layer structure. In general, some structures of the interlayer hybrid composites exhibit better flexural properties than that of the intralayer hybrid composites at the same C/G hybrid ratio; the alterations in layer structures make it possible to obtain excellent flexural properties for interlayer hybrid composites with less carbon fiber.
Highlights
Applications of carbon fiber composites in fan blades have attracted the interest of many developers due to the increasing demand for larger fan blades
Revealed from the results, the flexural modulus of interlayer hybrid composites with both carbon layers distributed at the exterior surface, such as the structure [C/G/G/C], is the maximum, which layers distributed at the exterior surface, such as the structure [C/G/G/C], is the maximum, which basically reaches thethe value of of thethe pure carbon composites, whereas thethe flexural failure strain is is the basically reaches value pure carbon composites, whereas flexural failure strain minimum, and the is small
The decisive factors for flexural properties of interlayer hybrid composites are determined by the compressive property of upper layers and the tensile property of lower layers; the layer structure plays an important role in the flexural property of interlayer hybrid composites, while the effect of the hybrid ratio on the flexural properties is small
Summary
Applications of carbon fiber composites in fan blades have attracted the interest of many developers due to the increasing demand for larger fan blades. The cost of carbon fiber is high, which may be the reason why wide applications in the industry is limited [2]. Glass fiber has a lower cost than carbon fiber; its low density and superior mechanical properties are why it is used in many fields, but its fracture strength and modulus are insufficient. Carbon fiber can provide high strength and stiffness [3,4]. It is proposed that intermingling carbon fiber into glass fiber-reinforced composite can make a composite with balanced properties that attains better mechanical performances [5]. Such a composite, consisting of two or more
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