Structural Engineering and Mechanics

  • 제27권4호
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  • Pages.409-424
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  • 2007
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Identification of impact forces on composite structures using an inverse approach

  • Hu, Ning (Department of Engineering Mechanics, Chongqing University, Department of Aerospace Engineering, Tohoku University) ;
  • Matsumoto, Satoshi (Department of Aerospace Engineering, Tohoku University) ;
  • Nishi, Ryu (Department of Aerospace Engineering, Tohoku University) ;
  • Fukunaga, Hisao (Department of Aerospace Engineering, Tohoku University)
  • 투고 : 2006.04.10
  • 심사 : 2007.04.26
  • 발행 : 2007.11.10
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, an identification method of impact force is proposed for composite structures. In this method, the relation between force histories and strain responses is first formulated. The transfer matrix, which relates the strain responses of sensors and impact force information, is constructed from the finite element method (FEM). Based on this relation, an optimization model to minimize the difference between the measured strain responses and numerically evaluated strain responses is built up to obtain the impact force history. The identification of force history is performed by a modified least-squares method that imposes the penalty on the first-order derivative of the force history. Moreover, from the relation of strain responses and force history, an error vector indicating the force location is defined and used for the force location identification. The above theory has also been extended into the cases when using acceleration information instead of strain information. The validity of the present method has been verified through two experimental examples. The obtained results demonstrate that the present approach works very well, even when the internal damages in composites happen due to impact events. Moreover, this method can be used for the real-time health monitoring of composite structures.

키워드

참고문헌

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  4. Piezoresistive Strain Sensors Made from Carbon Nanotubes Based Polymer Nanocomposites vol.11, pp.12, 2011, https://doi.org/10.3390/s111110691
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  7. Identification of impact force acting on composite laminated plates using the radiated sound measured with microphones vol.405, 2017, https://doi.org/10.1016/j.jsv.2017.06.009
  8. Impact damage monitoring of FRP pressure vessels based on impact force identification vol.23, pp.5-6, 2014, https://doi.org/10.1080/09243046.2014.915112
  9. Source location in plates based on the multiple sensors array method and wavelet analysis vol.28, pp.1, 2014, https://doi.org/10.1007/s12206-013-0938-5
  10. Simulated and experimental studies on identification of impact load with the transient statistical energy analysis method vol.46, pp.2, 2014, https://doi.org/10.1016/j.ymssp.2014.01.015
  11. Identification of locations and force histories of multiple point impacts on composite isogrid-stiffened panels vol.89, pp.1, 2009, https://doi.org/10.1016/j.compstruct.2008.05.018
  12. Inverse estimation of impact force on a composite panel using a single piezoelectric sensor vol.28, pp.6, 2017, https://doi.org/10.1177/1045389X16657424
  13. Impact source localization in plate utilizing multiple signal classification vol.227, pp.4, 2013, https://doi.org/10.1177/0954406212452233
  14. Damage Identification in Composite Plate Using an Inverse Optimization Procedure vol.166-169, pp.1662-7482, 2012, https://doi.org/10.4028/www.scientific.net/AMM.166-169.3241