How Hard is Carbon Fiber?
1 Answers
Carbon fiber material is an ultra-hard material that is 10 times harder than ordinary steel, second only to the hardness of diamond. Carbon fiber is formed by stacking organic polymer fibers with extremely high carbon content along the fiber bundle direction. The high hardness and super strong shear resistance we recognize are not entirely due to the material properties. There is a decisive factor involved, which is the critical void. When the stacking between fibers is below a certain critical value, the fiber void index between them determines the fiber's hardness, shear resistance, and tensile resistance.