Numerical enhancement of NMT for predicting fatigue failure

被引：0
作者：
Doughty, Timothy A. [1 ]
Dally, Matthew R. [1 ]
Bacon, Mikah R. [1 ]
机构：
[1] University of Portland, 5000 N Willamette Blvd, Portland, 97203, OR
来源：
Doughty, Timothy A. (doughty@up.edu) | 1600年 / SAGE Publications Ltd卷 / 05期
关键词：
Failure; Fatigue; Health monitoring; Nonlinear; Numerical enhancement;
D O I：
10.1007/978-3-319-04570-2__18
中图分类号：
学科分类号：
摘要：
Nonlinear Model Tracking (NMT) has been shown to be a robust method for predicting failure through nondestructive health monitoring. The method has been applied to slender cantilever beams of varying geometry subjected to harmonic nonstationary base excitation around the beams second natural frequency.Working with a nonlinear differential equation model, model parameters are mapped as the system health degrades. Continuous Time System Identification is populated with healthy system stimulus and response data and updated with aging real time response data. While the NMT method indicates with repeatability the onset of plasticity, crack initiation and growth well in advance of system failure, a phenomenon associated with specific geometries known as early onset drift can incorrectly flag system failure. Through numerical methods this phenomenon is explored. Additionally, two investigative numerical techniques are developed to give greater understanding and utility to the NMT method. © The Society for Experimental Mechanics, Inc. 2014.
引用
收藏
页码：159 / 166
页数：7
相关论文
共 18 条
  • [1] Doebling S.W., Farrar C.R., Prime M.B., A summary of vibration-based damage identification methods, Shock Vib Digest, 30, pp. 91-105, (1998)
  • [2] Khiem N.T., Lien T.V., Multi-crack detection for beam by the natural frequencies, J Sound Vib, 273, pp. 175-185, (2004)
  • [3] Loutridis S., Douka E., Hadjileontiadis L.J., Forced vibration behavior and crack detection of cracked beams using instantaneous frequency, NDT E Int, 38, pp. 411-419, (2005)
  • [4] Lee Y.Y., Liew K.M., Detection of damage locations in a beam using the wavelet analysis, Int J Struct Stab Dyn, 1, pp. 455-465, (2001)
  • [5] Gudmundson P., Changes in modal parameters resulting from small cracks, Proc Int Modal Anal Conf Exhibit, 2, pp. 690-697, (1984)
  • [6] Kim J.-T., Ryu Y.-S., Cho H.-M., Stubbs N., Damage identification in beam-type structures: Frequency-based method vs. Mode-shape based method, Eng Struct, 25, pp. 57-67, (2003)
  • [7] Ding J.L., Pazhouh J., Lin S.B., Burton T.D., Damage characterization by vibration test, Scripta Metall Mater, 30, pp. 839-844, (1994)
  • [8] Sih G.C., Tzou D.Y., Mechanics of Nonlinear Crack Growth: Effects of Specimen Size and Loading Step, pp. 155-169, (1984)
  • [9] Bovsunovsky A., Bovsunovsky O., Crack detection in beams by means of the driving force parameters variation at non-linear resonance vibrations, Key Eng Mater, 347, pp. 413-420, (2007)
  • [10] Andreaus U., Casini P., Vestroni F., Nonlinear Features in the Dynamic Response of a Cracked Beam under Harmonic Forcing, 6C, pp. 2083-2089, (2005)
12