![]() ![]() ![]() The stiffness and strength of a laminated carbon fiber epoxy sheet or plate are determined by: Carbon Fiber Class Low Modulus Standard Modulus Intermediate Modulus High Modulus Ultrahigh Modulus Tensile Modulus GPa <227 227 289 393 758 Tensile Modulus MSI <33 33 42 57 110 There are five carbon fiber classifications: low modulus, standard modulus, intermediate modulus, high modulus, and ultrahigh modulus. The English unit of measure is pounds of force per square inch of cross-sectional area, abbreviated as psi (or ksi for thousand psi and MSI for million psi). Tensile modulus is defined as “the ratio of stress (force per unit area) along an axis to strain (ratio of deformation over initial length) along that axis.” Also known as the stiffness, tensile modulus can predict the elongation or compression of material as long as the stress is lower than the tensile strength of the material.Ĭarbon fibers are classified based on the tensile modulus of the fibers. So how strong is it? Classifying Carbon Fiber Stiffness and Strength When layers of carbon fiber cloth are bonded together, into a carbon fiber plate or sheet, the carbon fiber laminate is exceedingly strong. These yarn-like strands are woven together into cloth of various weaves. Carbon fiber is made of very fine, crystalline filaments of carbon in “tows”, which contain thousands of individual filaments. ![]() The most valuable characteristics of carbon fiber are its strength, stiffness, and light weight. ![]()
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