The Size Effect in Fatigue of Plain and Notched Steel Specimens Loaded under Reversed Direct Stress
The Size Effect in Fatigue of Plain and Notched Steel Specimens Loaded under Reversed Direct Stress
复制标题
反向直接应力作用下普通钢和缺口钢试件疲劳尺寸效应
DOI：
--
复制
发表时间：
1951
期刊：
影响因子：
--
通讯作者：
R. Heywood
中科院分区：
文献类型：
--
作者：
C. E. Phillips;R. Heywood
确定了 0·19 英寸至 2·4 英寸范围内各种直径样本在反向直接应力下的疲劳强度，最大直径由可用机器的能力确定。本次调查使用了两种钢材：一种 25 吨低碳钢和一种 65 吨镍铬钢。样本可以是普通的，也可以是有凹口的（横向孔），并且在过渡半径和横向孔的直径方面尽可能保持几何相似性。还对其他类型的缺口（例如圆周 V 形槽和肩部）进行了一些疲劳试验。对于普通样品，没有观察到任何材料的固有尺寸效应。对于低碳钢横孔样品，对于直径 0·33 英寸的样品，疲劳极限为 ±8·4 吨/平方英寸，对于 1·7 英寸直径的样品，疲劳极限为每平方英寸 6·1 吨，从而表明存在明显的尺寸效应。发现了类似的尺寸效应...
The fatigue strength under reversed direct stress was ascertained for specimens of various diameters in the range from 0·19 inch to 2·4 inches, the largest diameter being determined by the capacity of the machines available. Two steels were used in this investigation—a 25-ton mild steel and a 65-ton, per cent nickel-chromium steel. The specimens were either plain or notched (transverse hole) and, as far as possible, geometrical similarity was preserved with regard to the transition radii and the diameter of the transverse hole. A few fatigue tests on other types of notch, such as a circumferential V-groove and a shoulder, were also carried out.No intrinsic size effect with either material was observed with the plain specimens.With transverse-hole specimens in mild steel, the fatigue limit was ±8·4 tons per sq. in. for specimens of 0·33 inch diameter, and 6·1 tons per sq. in. for specimens of 1·7 inches diameter, thus showing that an appreciable size effect was present. A similar size effect was found with...