不锈钢在室温下非比例应力和应变循环变形行为实验研究

AN EXPERIMENTAL STUDY ON THE DEFORMATION BEHAVIOR OF SS304 STAINLESS STEEL UNDER NONPROPORTIONAL CYCLIC STRESS AND STRAIN AT ROOM TEMPERATURE

在室温下对304不锈钢进行了多种长短轴比的椭圆形、菱形等非比例循环加载路径下的应力与应变路径形状、路径的应力与应变幅值、平均应变及其加载历史的影响的系统实验.结果表明,材料的循环塑性行为强烈地依赖于应力与应变路径形状、路径的应力与应变幅值及其加载历史.

Under several nonproportional cyclic elliptic and rhombic paths with different ratios between the lengths of long axes and the short axes, the effects of the path shapes of the cyclic strain and cyclic stress, the equivalent stress and strain amplitudes for the paths, the mean strain and their loading history on the nonproportional cyclic deformation behavior were experimentally investigated for SS304 stainless steel at room temperature. The experimental study shows that the cyclic plastic behavior of SS304 stainless steel depends strongly on the path shapes of the cyclic strain and cyclic stress, the equivalent stress and strain amplitudes for the paths and their loading history.