结构参数对蜂窝复合材料错位散斑检测结果的影响
Effect of Honeycomb Complicated Material Structure on Shearography
摘 要
为得到蜂窝结构参数对错位散斑无损检测结果的影响,运用有限元对真空加载下蜂窝结构错位散斑检测过程的变形情况进行了计算.基于周边固定支撑的圆形薄板在均匀载荷下变形的模型推导了蜂窝材料无损检测中缺陷离面位移最大值的理论公式.有限元软件对Abaqus进行了二次开发,分析了载荷、缺陷大小、蒙皮厚度及蜂窝层厚度对离面位移最大值的影响,在其他条件一定时,离面位移最大值与载荷成正比,与缺陷半径的4次方成正比,与蒙皮厚度的3次方成反比,与蜂窝高度无关.对蜂窝材料进行有限元仿真及错位散斑无损检测试验,验证了仿真的可靠性,为实际检测提供理论指导.
错位散斑无损检测
有限元
离面位移
Honeycomb structure
Shearography NDT
Finite element method
Off-plane displacement
Abstract
In order to find the effects of honeycomb material parameters on results in shearography NDT for honeycomb materials, calculations by finite element method are made.The theoretical formula of off-plane displacement of defect in shearography NDT for honeycomb materials is deduced based on the model of clamped circular thin plate under uniformly distributed load.The secondary development of Abaqus is made based on python, the process of shearography NDT for honeycomb materials is simulated by finite element method, the effects of load, defect size, skin thickness and honeycomb thickness on the maximum of off-plane displacement are analysed:when other conditions are fixed, the maximum of off-plane displacement is proportional to load and is the forth power of defect radius, it is inversely proportional to the third power of skin thickness and it has nothing to do with honeycomb thickness.Simulation by finite element method and experiment of shearography NDT for honeycomb materials are made, the reliability of simulation is verified, and simulation can provide theoretical guidance for practical detection.
中图分类号 TB331 TG115.28
所属栏目 无损检测新技术发展专题
基金项目 国家自然科学基金资助项目(21144005/B040607)
收稿日期 2014/6/5
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备注贾晓艳(1988-),女,硕士研究生,主要从事橡胶机械,无损检测方面的研究工作.
引用该论文: JIA Xiao-yan,MA Tie-jun. Effect of Honeycomb Complicated Material Structure on Shearography[J]. Nondestructive Testing, 2015, 37(4): 14～18
贾晓艳,马铁军. 结构参数对蜂窝复合材料错位散斑检测结果的影响[J]. 无损检测, 2015, 37(4): 14～18
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参考文献
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【6】蔡长青,贺玲凤.基于四步相移的相位差提取方法[J].华南理工大学学报:自然科学版,2011,39(9):93-96.
【7】张旭刚,张素香,程旭,等,层压结构复合材料的激光剪切散斑检测[J].无损检测,2014,36(7):56-59.
【8】陈新波,孙金立,袁英民,等.在役航空器上复合材料的综合检测与评价[J].无损检测,2013,35(7):50-53.
【9】HUANG Y H, NG S P, LIU L,et al.NDT&E using shearography with impulsive thermal stressing and clustering phase extraction[J].Optics and Lasers in Engineering,2009,47(7/8):774-781.
【10】张咏军,张咏红,王航宇.无损检测新技术在航空工业中的应用[J].无损检测,2011,33(3):43-46.
【11】蔡长青.散斑干涉计量关键问题研究及其应用[D].广州:华南理工大学,2013.
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【14】郭广平.计算机模拟技术在错位散斑干涉法中的应用[J].机械工程学报,2001,37(11):103-105.
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【16】曹金凤,王旭春,孔亮,等.Python语言在Abaqus中的应用[M].北京:机械工业出版社,2011.
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