通过工程案例及数值模拟得出快开门式压力容器啮齿是应力集中部位,容易导致疲劳开裂.疲劳试验得出疲劳微裂纹一旦萌生后,裂纹的扩展及齿块的断裂是个非常迅速的过程.磁记忆检测结果得出产生裂纹时,磁记忆曲线会发生突变,所以磁记忆曲线可很好判断裂纹的萌生.该技术在预测齿块疲劳状态及提前消除事故隐患方面具有很高研究价值.%Through the engineering case and numerical simulation, meshing teeth of fast open pressure vessel are the stress concentration position, It can lead to fatigue cracking. Fatigue test shows that the crack propagation and the fracture of the meshing teeth are very rapid after the fatigue crack initiation. Magnetic memory test results show that when the crack occurs, the magnetic memory curve will be a mutation. So the magnetic memory curve can be used to determine the crack initiation. This technique has high research value in predicting the fatigue state of meshing teeth and eliminating the hidden danger of accident in advance.
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