Ulf Haßler

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This paper presents a method for computation of the fiber content of carbon fiber preforms from 3D computed tomography (CT) data. Quantitative estimations of the fiber content are deduced under the assumption of the presence of regions with maximum possible fiber packing. This method is used to compare the influence of different sewing techniques onto the(More)
Determining fiber length distribution in fiber reinforced polymer components is a crucial step in quality assurance, since fiber length has a strong influence on overall strength, stiffness, and stability of the material. The approximate fiber length distribution is usually determined early in the development process, as conventional methods require a(More)
In this article, pulsed micro-laser line thermography (pulsed micro-LLT) was used to detect the submillimeter porosities in a 3D preformed carbon fiber reinforced polymer composite specimen. X-ray microcomputed tomography was used to verify the thermographic results. Then, finite element analysis was performed on the corresponding models on the basis of the(More)
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