Carbon fibres, tensile properties table

Some engineering applications of polymers reinforced with glass fibre and carbon fibres are shown in Tables 2.4 and 2.5. It is seen that there are wide ranges of applications particularly in glass fibre, carbon fibre and nanotubes. Many of these applications require polymers, which have a particularly high standard of properties, for example, stability in impact and tensile properties, thermal properties, dimensional stability and, chemical and oil resistance. 

Tensile properties of the HDPE/RET blend are shown in Table 8.2. The HDPE 100/0 carbon-fibre composite showed complete linear stress-strain behaviour up to its ultimate tensile strength and fracture at 10.3% strain. No definitive fracture was seen in the HDPE blends. This is due to the interfacial de-bonding between the constituents within the polymer. The apparent loss of cohesive strength of the matrix material resulted in fibre pull-out and interlaminar slip between the carbon-fibre plies. 

Table 8.2 Tensile properties of HDPE/RET carbon fibre composites ...

The third of these belong to the HT type with high tensile strength and improved stiffness. Table 6.11 shows some mechanical properties of different types of carbon fibres. 

The carbon fibres used are from the separate sources and cover all the grades listed in Table 3.1. Measurements were made at room temperature and all the matrices except one are epoxies. The use of bismaleimide resin makes little difference to properties apart from the relatively low transverse strain-to-failure. The large gaps in information especially for transverse, compressive and shear properties are clear. The anisotropy of unidirectional materials can be seen by comparing longitudinal and transverse tensile or shear moduli and strengths. 

Table 6.4 Material properties used in theoretical stress analysis and failure predictions of high-tensile steel/carbon fibre composite [8]...

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