Volume 35 Issue 12
Dec.  2020
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ZHANG Baoshuang, AO Bo, DING Yang. Three-dimensional imaging analysis of tension-compression fatigue damage in viscoelastic damper[J]. Journal of Aerospace Power, 2020, 35(12): 2635-2641. doi: 10.13224/j.cnki.jasp.2020.12.017
Citation: ZHANG Baoshuang, AO Bo, DING Yang. Three-dimensional imaging analysis of tension-compression fatigue damage in viscoelastic damper[J]. Journal of Aerospace Power, 2020, 35(12): 2635-2641. doi: 10.13224/j.cnki.jasp.2020.12.017

Three-dimensional imaging analysis of tension-compression fatigue damage in viscoelastic damper

doi: 10.13224/j.cnki.jasp.2020.12.017
  • Received Date: 2020-05-20
  • Publish Date: 2020-12-28
  • Three-dimensional observation of the damper was performed by micro-CT (micro computed tomography), and the imaging resolution was 91.89 μm. The voids and cracking defects of the rubber layer were successfully extracted through three-dimensional segmentation, and quantitative analysis of defects’ geometric parameters such as diameter and total volume was performed. In order to improve the imaging resolution, local high-resolution micro-CT imaging and 3D visualization analysis of single void defects were performed to obtain the information of single void morphology. The results showed that the main defects of viscoelastic damper mainly included debonding, void and cracking, the maximum void diameter of the upper and lower rubber layers was 13.12 mm and 12.21 mm, respectively. It was found that cracking existed at the ends of the upper and lower sections, the ring-shaped crack body extended upward to the surface of the rubber layer and downward to the outer wall of the aluminum alloy inner tube. The three-dimensional imaging resolution of local micro-CT was 20.85 μm. The experimental results showed that the surface morphology of a single void had wrinkles and pits, but no micro-cracks were found. Digital radiography(DR) experiment results show that it is feasible to detect the debonding and void defects of rubber layer in viscoelastic damper by X-ray tangential radiography.

     

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