Experimental study on influence of fabric structure on mechanical properties of composites

The tensile and compressive properties of warp-knitting and plain woven carbon fiber composites were studied by the macro tensile and compression test, and acoustic emission analysis and microscopy analysis of the fracture surface of destroyed specimens were adopted to realize the failure mechanism of tensile and compression deeply. The results show that the fabric structural forms have great influence on mechanical performance of carbon fiber composites. Compared with warp-knitting carbon fiber composites, plain woven carbon fiber composites have lower tensile and compressive strength, the fracture of the destroyed specimens were much more regularly, and the stratification phenomena was not obvious. On the acoustic emission analysis, the types of damage can be determined in the process of destruction. Compared with warp-knitting carbon fiber composites, plain woven carbon fiber composites have relatively stable but lower acoustic emission voltage signal.