【摘要】 通过Ａ５３７、Ａ１３１，Ｅ３６和１５ＭｎＮｉ几种钢焊接接头进行在海水和空气中的疲劳试验。在双对数ｌｏｇｄａ／ｄＮ，ｌｏｇΔＫ和ｌｏｇｄａ／ｄＮ，ｌｏｇΔＪ坐标图上，用一条或两条直线二拟合试验数据，因而得到ｄａ／ｄＮ＝ｃ（ΔＫ）￣ｍ和ｄａ／ｄＮ＝Ａ（ΔＪ）￣ｎ（或ｄａ／ｄＮ＝Ｂ（ΔＪｅ）￣β；ｄａ／ｄＮ＝Ｄ（ΔＪ＿ｐ）￣γ）拟合方程式。用Ｆ检验和其他方法去评价拟合曲线，表明该统计结果的拟合是比较精确的，所得上述方程在工程应用是合理的和可行的。更多还原

【Abstract】 As to the welded joints made of A537、 A131、 E36、 15MnNi and other steels the fa-tigue testing has been executed in sea water and atmosphere. By using with the doub-le-logarithmic coordinate system of log da/dN and log ΔK or log da/dN and log ΔJ the exper-imental data have been fitted with a straight line or two lines, thus the fitting equations da/dN=C(ΔK)￣m and da/dN=A(ΔJ)￣n(or da/dN=B(ΔJ_c)￣β and da/dN=D(ΔJ_p)￣r)have been obtained. Having evaluated the fit curve by the F test and the others, the statistical results show that thefitting is relatively accurdte, so these equations are feasible and predical.更多还原