论文部分内容阅读
本文的目的,在于探讨侧向槽对材料的COD值和n值的影响,以便选出一种不受零件几何形状和尺寸影响的塑性材料断裂强度指标. 根据大量试验和计算结果,说明塑性材料的δ值与侧向槽的形状、深度及其它几何形状与尺寸无关,但其δ_m值,则与侧向槽的形状、深度和其它几何形状与尺寸有关;同时,由试验知,当侧向槽的深度不同时,n值的变化范围为0.38-0.43,但对一定深度的侧向槽.在加载过程中,其n值为一常数,即其旋转中心的位置不变.
The purpose of this paper is to investigate the effects of side channels on the COD and n values of materials in order to select a fracture strength index that is not affected by the geometry and size of the part.According to the large number of experiments and calculations, Δ value is not related to the shape, depth and other geometry and size of the lateral groove, but its δ_m value is related to the shape, depth and other geometric shapes and dimensions of the lateral groove. At the same time, When the depth of the groove is different, the value of n varies from 0.38 to 0.43, but for a certain depth of the lateral groove, the value of n is constant during loading, that is, the position of its rotation center is unchanged.