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Publikationen von Professorinnen und Professoren der HAW Hamburg

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Zeitschriftenbeiträge:

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Felix Langfeldt, Hannah Hoppen und Wolfgang Gleine
Broadband low-frequency sound transmission loss improvement of double walls with Helmholtz resonators
Journal of Sound and Vibration, 476:115309
23 Juni 2020

Marker: TI-FF

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Aurelio Jose Olivares Ferrer, Markus Linke und Juan Antonio Garcia-Manrique
Influence of geometric imperfections and internal damage patterns of thin-walled laminates on failure in Compression-After-Impact testing
Procedia Manufacturing, 41(2019):200-207
9 März 2020
ISSN: 2351-9789
Englisch

Schlüsselwörter: Finite elements; Abaqus; Compression-After-Impact testing; geometric imperfection; delamination; internal damage; composites; CFRP; ultrasonic scan; low-energy impacts;

Marker: F+F

Zusammenfassung: Geometric imperfections are induced in composite structures due to manufacturing and assembly processes as well as due to accidental impacts. These geometric imperfections have an influence on the strength of thin-walled composite structures when impact damage is present. Therefore, the influence of the geometric imperfection magnitude on the failure mechanisms of thin-walled laminates with initial internal damage patterns under Compression-After-Impact testing is investigated by creating a finite element model based on different experimental validations. These experiments are a set of tensile tests, low energy impact tests with a pendulum system to induce the internal damage patterns, ultrasonic scanning of the damaged samples to characterize the delaminated areas and, finally, a set of Compression-After-Impact tests combined with digital imaging correlation data using an ARAMIS 3D measuring system (Gom mbH, Braunschweig, Germany). Compression-After-Impact tests are carried out with a frame modified for thin-walled laminates enabling a more reliable measurement of thin laminates. All these data collected during the experiments and damage inspections are used to build up and validate the simulations with the Finite Element code Abaqus (Dassault Systèmes SA, Paris, France). Finally, potential interactions between global and local failure mechanisms in Compression-After-Impact testing are analyzed with different imperfection magnitudes and interface damage idealizations based on these models. The results show an increase of the failure strength with the initial imperfection magnitude.

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Aurelio Jose Olivares Ferrer und Markus Linke
Harzinjektion: CFK-Reparaturtechnik für die zivile Luftfahrt?
Ingenieurspiegel, (März 2020):14-17
5 März 2020
Deutsch

Schlüsselwörter: Carbonfaserverstärkten Kunststoffen (CFK); Reparaturmethoden; Harzinjektion; Schaden; Delaminationen; BVID

Marker: F+F

Zusammenfassung: Herausragende Bedeutung für die zivile Luftfahrt von heute besitzen schnelle und kosteneffektive Reparaturmethoden für Primärstrukturen aus carbonfaserverstärkten Kunststoffen (CFK). Hintergrund ist, dass die bei metallischen Flugzeugen bewährten Reparaturmethoden nur bedingt auf diese Werkstoffklasse übertragen werden können.

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Dieter Scholz
Publishing in “Aircraft Design” with a Continuous Open Access Special Issue
Aerospace, 7(1):5
14 Januar 2020
ISSN: 2226-4310

Schlüsselwörter: aerospace; aviation; aeronautics; airplanes; aircraft; design; publishing; open access; special issue; MDPI; permalink; archive

Marker: TI-FF

Zusammenfassung: The article looks at publishing options in the field of aircraft design to find that no dedicated journal on aircraft design exists. For this reason, a Continuous Special Issue Aircraft Design of the well established journal “Aerospace” at the Open Access publisher MDPI is started. Often special issues of a journal are introduced for “hot topics”. Here, the subset “special issue” is used for a scientific domain – in this case “aircraft design”. Recurring single special issues are numbered in sequence and are identified by the year of the deadline for manuscript submissions. This allows for the delivery of several single special issues over time in a row without the need to define a publishing schedule up front. Together these single issues form the Continuous Special Issue Aircraft Design and offer a new publishing home for the aircraft design community.

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Kai Kruppa und Gerwald Lichtenberg
A Heating Systems Application of Feedback Linearization for MTI Systems in a Tensor Framework
Springer International Publishing, Advances in Intelligent Systems and Computing(947):126-152
2020

Marker: LS-MT

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H. Cornel, S.B. Gahleitner, I. Köhler-Saretzki, K. Nowacki, I. Sarto-Jackson, R. Schleiffer, M. Schröder und G.J. Suess
Bindung und Beziehung in der Sozialen Arbeit – einführende Bemerkungen
Soziale Arbeit,
2020
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G.J. Suess
Bindungsdynamik in der Beratung. Das Aufeinandertreffen zweier Bindungsmodelle in der beraterischen Beziehung
Soziale Arbeit,
2020
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Linus Wittmann, Petra Hampel, Ulrike Peter, Anne Karow, Jürgen Gallinat und Gunter Groen
Die gruppentherapeutische Intervention „Gesund bleiben im Beruf“ zur Wiedererlangung der Arbeitsfähigkeit. Eine Pilotstudie
Zeitschrift für Klinische Psychologie und Psychotherapie, 48:101-109.
2020

Marker: W & S

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Linus Wittmann, Gunter Groen und Petra Hampel
Formative Evaluation der arbeitsbezogenen Gruppentherapie "Gesund bleiben im Beruf".
Prävention und Gesundheitsförderung,
2020

Marker: W & S

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Said Ali El-Busaidy, Bernd Baumann, Marcus Wolff und Lars Duggen
Modelling of open photoacoustic resonators
Photoacoustics, 18
2020

Marker: TI-MP

Zusammenfassung: Photoacoustic spectroscopy employs acoustic resonators for signal amplification. Resonators are usually closed, however, in some applications, open resonators are preferred. The opening deteriorates the photoacoustic signal hence reducing the sensitivity of the photoacoustic measurement. We present two new approaches for simulating the photoacoustic signal in open resonators using finite element modelling. The approaches are based on the amplitude mode expansion model and the viscothermal model with the opening modelled using perfectly matched layers and the boundary element method respectively. Additionally, the performance of the viscothermal model using perfectly matched layers for simulating open resonators is extended to the ultrasound region. The simulation results are verified by comparing them to photoacoustic measurements. The approaches provide an accurate basis for designing and optimizing open resonators with high sensitivity.

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Letzte Änderung: 23.01.15

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