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首页> 外文会议>17th European conference on fracture : Multilevel approach to fracture of materials, components and structures : Book of abstracts amp; proceedings on CD ROM >3-D Local Hybrid Method Based on Surface Displacement Measurementfor Structural Health Monitoring
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3-D Local Hybrid Method Based on Surface Displacement Measurementfor Structural Health Monitoring

机译：基于表面位移测量的3-D局部混合方法用于结构健康监测

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摘要

Real structure is opaque and it is very difficult to evaluate the stress field inside a structure.rnTherefore, it is very important to evaluate the stress field inside structure from the information on thernsurface. Then, it waits for development of the method of evaluating the stress field inside structurernfrom the easy measurement on a free surface for structural health monitoring. The stress analyses ofrnlarge structure are possible by the 3-D finite element method. However, great time and a great labor,rnand great expenses are needed for modeling and calculation. To evaluate the 3-D stress field insidernstructure from surface displacement measurement, the 3-D local hybrid method based on inversernanalysis was developed. Then, we investigated whether this method could be applied tornthrough-thickness or surface cracked specimens subjected to uniform, mixed-mode and bendingrnloading problems. The good result was obtained on the bending problem as well as the uniformrnloading problem. The 3-D local model hybrid method is a practically very useful approach which thernstress field inside structure can be analyzed by measuring only the displacement field near a crack orrna hole without analyzing entire structure by the 3-D finite element method.
机译：实际结构是不透明的，很难评估结构内部的应力场。因此，根据表面信息评估结构内部的应力场非常重要。然后，它等待着从易于在自由表面上进行测量以评估结构健康状况的方法来评估结构内部应力场的方法的发展。通过3D有限元方法可以对大型结构进行应力分析。但是，建模和计算需要大量的时间和大量的劳动，需要大量的费用。为了从表面位移测量中评估3-D应力场的内部结构，提出了一种基于逆分析的3-D局部混合方法。然后，我们研究了这种方法是否适用于承受均匀，混合模态和弯曲载荷问题的穿透厚度或表面开裂的试样。在弯曲问题以及均匀载荷问题上都获得了良好的结果。 3-D局部模型混合法是一种非常实用的方法，可以通过仅测量裂纹或孔眼附近的位移场来分析结构内部的应力场，而无需通过3-D有限元方法来分析整个结构。

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