Measurement of Sub-Surface Core Damage in Sandwich Structures Using In-situ Hertzian Indentation During X-ray Computed Tomography

作者：Dietrich S^*; Koch M; Elsner P; Weidenmann K

来源：Experimental Mechanics, 2014, 54(8): 1385-1393.

DOI：10.1007/s11340-014-9902-2

• Micro-computed tomography
• GFRP honeycomb sandwich
• In-situ loading
• Indentation
• Contact modelling

Composite sandwich structures with honeycomb cores show varying properties in geometry and mechanical behavior depending on the studied scale. Herein a new test and evaluation method for sub-surface core damage in the indentation area of honeycomb sandwich structures using computed tomography is presented. The combination of X-ray micro-computed tomography (X-mu CT) and an image analysis procedure adjusted to the detection of core deformation mechanisms allows the extraction and quantification of externally invisible, sub-surface damage in the sandwich composite. For this specific contact or indentation loading case on the sandwich face sheet an in-situ device is introduced, enabling a 3D analysis of the structural change during progressing indentation depth.

• 出版日期2014-10