Ulf Haßler

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The aim of our work was the integration of various newly-developed methods into a system for fully automatic radioscopic inspection of arbitrary casting parts. Using a 16-bit flat-panel detector, projections in arbitrary directions through the part are acquired and analysed. The software tool for inspection can be separated into five stages: registration,(More)
Due to the rapid development of light weight materials for use in the aerospace industry, the test requirements for these materials and parts manufactured of them become more complex constantly. To meet these new and challenging requirements a single testing method is often not sufficient. Herein we present a multimodality approach by combining ultrasound(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)
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)
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)
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