Temperature effect on compression property of multiaxial warp-knitted composites

Abstract

The wind turbine blades are exposed to various environments all the year round, especially temperature variations during the four seasons. To study the influences of temperatures on the mechanical properties of composite materials, the compression property in the 0°, 45°, and 90° directions of the multiaxial (triaxial and quadaxial) glass fiber warp-knitted composites at −30°C, 0°C, 20°C, and 40°C was analyzed, respectively. The stress–strain curves, strength, modulus, failure strain, and the relationship between strength and temperature were obtained. The results indicated that the compression performance decreased with the increase of temperature, and the effect of temperature on quadaxial composite was more significant than that of the triaxial composite. In addition, the failure mechanisms were also analyzed according to the fracture modes and scanning electron microscopic morphologies of composites.

The friction and wear behaviors of self-lubricating composites with two types of warp-knitted fabric structures

“…As the key part of fabric composites, the fabrics are usually composed of different kinds of high performance fibers such as PTFE (self-lubricating function) and Nomex (reinforcing function), which together with the resin polymer enable fabric composites the characteristics of designability, high specific strength, fatigue resistance and light weight [6][7][8][9]. For the fabric weaving, parameters such as thickness, layer numbers and yarn types is correlated with the weave structure, thus influence the wettability property, adhesion property, wear debris capturing ability and load-carrying ability of the composites [10][11][12][13]. Based on that, to study the effect of fabric structure on the tribological property of warp-knitted fabric composites, it is significantly important to carry out the preparation process and tribo-tests for the warp-knitted fabric composites.…”

An experimental investigation for the temperature effect on the bending properties of multiaxial warp-knitted composite

“…The results showed that the bending properties have been decreased significantly with the increase in temperature. Yang et al 19 investigated the influence of temperatures on the compression property of MWC. The results indicated that the compression performance has been decreased with the increase in temperature.…”