By means of bending tests of three - point and four - point , complex fracture experiments were made for cast iron material with crack . the stress intensity factor and breaking direction angle of cast iron material were measured and compared with theoretical values . based on the research some useful conclusions are given for engineering design and application 通过3点弯曲和4点弯曲实验方法,对含有裂纹的铸铁材料进行复合型断裂实验研究,测试铸铁材料的应力强度因子、断裂方向角,将实验结果与理论值进行分析、比较,找出两者之间的异同点,得到一些对工程设计及应用具有实际意义的结论。
The wider range of the directional distribution of wave energy , the shorter of the mean crest lengths and the wider range of the distribution of crest directional angles . the crest height and crest length show a high relativity while the crest heights are low and become independence at very high crest height 获得了波峰长度的统计分布、波峰长度与波峰高度的联合分布、波峰高度与波峰长度相关性、波峰长度与波峰方向角的联合分布以及波峰在一个大面积海域中的出现概率等结果。
