Research process on property and application of metal porous materials

Novel copper foam with ordered hole arrays as catalyst support for methanol steam reforming microreactor

Morphology and transport properties of fibrous porous media

Paper and paperboard are widely used in packaging products. The material behavior of paper and paperboard is very complex because different scales need to be considered in order to describe all relevant effects and phenomena. In particular, at least three scales can be distinguished: the fiber scale, network scale, and sheet scale. Since it is extremely challenging to measure the material behavior experimentally on all of these scales simultaneously, computational modeling of these materials has gained importance in recent years. This work aims at giving a systematic review of the numerical approaches and obtained results published in recent years. Focus is set on both the recent trends and achievements as well as challenges and open questions.

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A Review of Recent Trends and Challenges in Computational Modeling of Paper and Paperboard at Different Scales

A skeleton-based fiber tracing algorithm is described and applied on a specific fibrous material, porous metal fiber sintered sheet (PMFSS), featuring high porosity and curved fibers. The skeleton segments are firstly categorized according to the connectivity of the skeleton paths. Spurious segments like fiber bonds are detected making extensive use of the distance transform (DT) values. Single fibers are then traced and reconstructed by consecutively choosing the connecting skeleton segment pairs that show the most similar orientations and radius. Moreover, to reduce the misconnection due to the tracing orders, a multilevel tracing strategy is proposed. The fibrous network is finally reconstructed by dilating single fibers according to the DT values. Based on the traced single fibers, various morphology information regarding fiber length, radius, orientation, and tortuosity are quantitatively analyzed and compared with our previous results (Wang et al., 2013). Moreover, the number of bonds per fibers are firstly accessed. The methodology described in this paper can be expanded to other fibrous materials with adapted parameters.

Skeleton-based tracing of curved fibers from 3D X-ray microtomographic imaging

Three-dimensional reconstruction and morphologic characteristics of porous metal fiber sintered sheet

Nature Science Foundation of China [51275177, 51105144, 51105387]; Nature Science Foundation of Guangdong Province [S2012010008626]

Qinghui Wang

Papers

Three-dimensional reconstruction and morphologic characteristics of porous metal fiber sintered sheet

A simple fracture energy prediction method for fiber network based on its morphological features extracted by X-ray tomography