【摘要】 用光学显微镜测试了码尺长度为10～625μm区间的预切口螺纹钢在热轧、正火和退火条件下的分形维数，它们分别为1．13，1．05，1．19。用中点细分内插方法构造了递归深度为6时的不同分形维数的曲线。比较发现它们趋向相同，但不相等。由此说明在断口的一维分形研究中并非所有区域的剖面均等效。更多还原

【Abstract】 The fractal dimension of tensile fracture surface of notched reinforcement bars was determined using optical microscope with the marker length ranging from 10 to 62. 5 μm, and the fractal dimensions so determined for hot rolled, normalized and annealed samples were 1. 13. 1. 05 and 1. 19 respectively. Curves of different fractal dimensions with a regression depth of 6 were constructed by a mid-point interpolation method.These curves were found to have similar tendency, though they were not identical. It was shown that the measured fractal dimension at different areas on a single fracture surface. was not always in agreement with that predicted from the one dimensional fractal study.更多还原