拉伸速率对碳纤维单丝拉伸性能的影响

Effect of tensile rate on tensile performance of carbon fiber monofilament

碳纤维单丝直径通常小于10μm,拉断载荷很小,其拉伸试验有别于常规材料.测定了T300-12K碳纤维单丝的拉伸性能,考察了拉伸速率对拉伸性能的影响.结果表明:随着拉伸速率提高,碳纤维单丝拉伸强度明显增大,拉伸强度由拉伸速率为0.1mm/min时的2 699MPa增加到10mm/min时的3 464MPa;表观弹性模量略有增大,大致呈线性规律增加,由拉伸速率为0.1mm/min时的186GPa增加到10mm/min时的209GPa;断裂伸长率随拉伸速率变化不大.

The diameter of carbon fiber monofilament is generally less than 10μm,so that its breaking-off load is very small.Its tensile experiment is different from that of common materials.The tensile performance of carbon fiber monofilament T300-12K was tested and the influence of tensile rate on tensile performance was investigated.The result showed that the tensile strength of the carbon fiber monofilament would obviously increase with the tensile rate.When tensile rate varies from 0.1 mm/min to 10 mm/min,the tensile strength would increase from 2 699 MPa to 3 464 MPa and apparent elastic modulus would linearly increase from 186 GPa to 209 GPa when tensile rate varies from 0.1 mm/min to 10 mm/min.The break-elongation rate would very a little had not much changed with tensile rate.