Simplified Stress-Strain Relations of Multi-ply Cords

합사코오드의 단순화 응력 변형률 관계

Simplified tensile stress-strain relation of textile cords was derived and discussed with Riding's experimental results. Theoretical equations for two-, three-and seven-ply cords are developed under the consideration of different geometrical packing. The tensile stress-strain relation of cord is expressed in terms of "Cord Factor." As cord twist and cord strain increase, the deviation between theoretical and experimental values increases for the two and three-ply cords. In case of seven-ply cord, the agreement between the calculated and experimental is very good compared with the other two cord structures.