The Finite Element Simulation and Influence Factors of Metal Magnetic Memory Signals
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摘要: 局部应力集中形成的裂纹是导致金属构件发生断裂的主要因素,目前金属磁记忆方法是检测铁磁性构件早期损伤或应力集中程度的有效手段,然而在实际应用中,金属磁记忆方法仍存在一些问题,例如无法定量评估应力集中程度、外部因素对磁记忆信号存在耦合影响等.为了确定金属磁记忆检测的影响因素,以45号钢为例,利用ANSYS有限元分析软件进行仿真模拟并分析了试件所受拉伸载荷的大小、提离值、检测方向及扫描路径等对磁记忆检测结果的影响,获得一些定性的结果,可为试验研究和实际应用中的信号分析奠定相关基础.Abstract: The local stress concentration is easily to cause cracks,which is the main factor that leads the metal structures to break down or fail.At present,the metal magnetic memory testing is an effective method to detect early injury or stress concentration degree of ferromagnetic component.However in practical application,there still exist some problems for the metal magnetic memory testing,For example,metal magnetic memory testing technology cannot quantitatively assess the degree of stress concentration and cannot assess the coupling influence of external factors on the magnetic memory signals.To determine influence factors on metal magnetic memory testing,based on 45#carbon steel material,the magnetic memory testing effect of the specimens under different tensile loads,lift-off value,detection of direction,scan path are simulated by ANSYS.Some qualitative results are attained and analyzed,which can give more basis for signal analysis on experimental research and practical applications in this field.
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