The elastic modulus obtained from the stress–strain curves and the average strain rate calculated from the measured strain–time curve before failure occurs are shown in Table 118With the existence of dynamic loads and initial static loads, the dynamic and static elastic modulus and Poisson's ratio refer to the corresponding value under dynamic and static conditionsDislocations which in turn governs the yield stress Consequently, the Y/T ratio is higher for modern steels The typical relationships between yield strength and Y/T ratio are shown in Fig 3 from different sources(3,4) Since a low Y/T ratio has formerly been considered as providing a high capacity for strain hardening, and a safe margin againstPoisson's Ratio Definition When a deforming force is applied at the free end of a suspended wire of length l and radius R, then its length increases by dl but its radius decreases by dR Now two types of strains are produced by a single force Q Tbn And9gcqdhkmo7hherjjmwerev9j1zxq
