In-Situ Compression Test of Artificial Bone Foams in Controlled Environment Using X-Ray Micro-Computed Tomography

Abstract

In this study, we investigated specimens of artificial bone foams, developed by the research group for surgical simulators at the UAS Linz, which are used to mimic the haptic feedback of physiologic and pathologic bone for more realistic surgery training. Specimens with two kinds of mineral filler material as well as different amounts of foaming agent were tested in an environmental in-situ loading stage developed by the ITAM CAS and scanned via X-ray micro-computed tomography. In this in-situ stage, specimens can be immersed in liquid and tested under temperature-controlled conditions. Consequently, a total amount of 12 specimens was subjected to compression loading; half of them immersed in water at 36.5◦C and half in dry condition. Results showed that there is no significant influence of liquid immersion to the compression outcome. However, foams with less amount of foaming agent appeared to have smaller pores resulting in higher compression strength.

2D and 3D in-situ mechanical testing of an interpenetrating metal ceramic composite consisting of a slurry-based ceramic foam and AlSi10Mg

“…With a diamond hollow drill, manufactured by Günther Diamantwerkzeuge, Idar-Oberstein, Germany and the dimensions of 3 mm as an outer diameter, cylindrical samples were cut out of the sample slice, according to the scientific exchange with B. Plank [16] or given for other materials and dimensions in Glinz et al [17]. To reach plan parallel surfaces for compression testing, the cylinder faces were grinded parallel with abrasive SiC grinding paper of P500.…”

3D modeling and experimental investigation on the damage behavior of an interpenetrating metal ceramic composite (IMCC) under compression

“…With a diamond hollow drill, manufactured by Günther Diamantwerkzeuge and the dimensions of 3 mm as an outer diameter, cylindrical samples were cut out of the sample slice, according to given literature for other materials and dimensions, e.g. in Glinz et al [27]. To reach plane parallel surfaces for compression testing, the cylinder faces were grinded parallel with abrasive SiC grinding paper of P500.…”

X-ray Tomographic Reconstruction for Understanding Lignin-Induced Changes in the Microstructure and Properties of Polyurethane Insulation Foam

“…Earlier studies on X-ray μCT for the characterization of foam have reported the analysis of spatial microstructural parameters such as the average cell size and distribution, cell orientation, and porosity, 10,21,28,30−35 including a study on lignin copolymerized foams. 36 In these studies, the quantification of the skeletal parameters (such as the volumetric strut fraction or thickness and lengths of cell walls and struts) has been challenging using 3D reconstructed images, given that it may result in inaccuracies or loss of data. 29 In such cases, binary operations (2D) such as thresholding, erosion, and dilation are used to take apart the foam skeleton into struts and walls.…”