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Autor

  • Baeßler, Matthias (5)
  • Nerger, Deborah (5)
  • Niederleithinger, Ernst (5)
  • Herten, M. (4)
  • Hille, Falk (4)
  • Redmer, Bernhard (4)
  • Georgi, Steven (3)
  • Grunwald, Marcel (2)
  • Hering, M. (2)
  • Kühn, T. (2)
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Erscheinungsjahr

  • 2019 (5)
  • 2018 (3)
  • 2017 (1)
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  • 2013 (5)

Dokumenttyp

  • Vortrag (10)
  • Beitrag zu einem Tagungsband (5)
  • Posterpräsentation (3)

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  • Deutsch (9)
  • Englisch (9)

Referierte Publikation

  • nein (18) (entfernen)

Schlagworte

  • Impact (6)
  • Damage characterization (4)
  • Numeric simulation (4)
  • Planar tomography (4)
  • Reinforced concrete structure (4)
  • Bohrpfähle (2)
  • Compressive strength (2)
  • DUCON® (2)
  • Ductility (2)
  • Dynamische Pfahlprobebelastung (2)
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Organisationseinheit der BAM

  • 8 Zerstörungsfreie Prüfung (18) (entfernen)

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Post-impact evaluation at RC plates with planar tomography and FEM (2019)
Nerger, Deborah
Due to the many possible applications, the uncomplicated production and the high application range, reinforced concrete is a widely used building material. This large range of physical material properties still poses an engineering challenge in determining all necessary requirements for predicting dynamic effects under impact load. Many aspects of impact have already been examined and some correlations have been studied intensively. Examples are the work of Lastunen and Booker, who studied the influence of projectile properties on the impact form. Li has also investigated the local effects of an impact. The field of detailed damage analysis has not been in focus so far. This presentation shows some studies in medium-velocity impact with the focus on post-impact damage evaluation. The impactor is modified so that the test plates show low penetration on the top and scabbing on the bottom. With the unique tomography lab test stand at BAM the plate is scanned after the impact and the damage is analyzed. Cracks and scabbing are made visible with a reconstruction. The comparison of simulation and tomography allows to create prognosis models for damage characterization.
Post-impact evaluation at RC plates with planar tomography and FEM (2019)
Nerger, Deborah
The aim of the work is to develop experimental investigation strategies to determine damage quantities and the liquid Intrusion behaviour of containment structures in case of aircraft collision.
Improved tomographic investigation for impact damage characterization (2019)
Nerger, Deborah ; Hille, Falk ; Moosavi, Robabeh ; Grunwald, Marcel ; Redmer, Bernhard ; Kühn, T. ; Hering, M. ; Bracklow, F.
Reinforced concrete (RC) is used as structural material in most diverse civil engineering applications. For the variability of its physical properties it is still an engineering challenge to meet all necessary requirements for the prediction of dynamic effects under impact loading. In this paper, investigations are shown within the scope of quantifying and evaluating the damage caused by an impact. The experimental investigations are performed in the field of low- and medium-velocity impact. The chosen flat nose shape results in small penetrations on the top side and scabbing on the bottom side. The plate is scanned with an adapted planar tomographic examination after the impact, and the damage is analysed, afterwards. Cracks and spalling are made visible with a reconstruction. The numerical model validated on the tomographic results justifies the application for further predictions of the damage description.
Improved tomographic investigation for impact damage characterization (2019)
Nerger, Deborah
Reinforced concrete (RC) is used as structural material in most diverse civil engineering applications. For the variability of its physical properties it is still an engineering challenge to meet all necessary requirements for the prediction of dynamic effects under impact loading. In this paper, investigations are shown within the scope of quantifying and evaluating the damage caused by an impact. The experimental investigations are performed in the field of low- and medium-velocity impact. The chosen flat nose shape results in small penetrations on the top side and scabbing on the bottom side. The plate is scanned with an adapted planar tomographic examination after the impact, and the damage is analysed, afterwards. Cracks and spalling are made visible with a reconstruction. The numerical model validated on the tomographic results justifies the application for further predictions of the damage description.
Damage investigations of concrete under impact load using laminography (2018)
Moosavi, Robabeh ; Grunwald, Marcel ; Redmer, Bernhard ; Nerger, Deborah ; Hille, Falk ; Kühn, T. ; Hering, M.
We examine the behavior of reinforced concrete components subjected to impact induced loading conditions which might be caused by vessels collisions such as aircraft fuel tanks The concrete plates were impact damaged at TU Dresden and shipped to BAM At BAM laminar tomography as the imaging method is used to determine and quantify the damage state An automatic crack detection method based on template matching is applied to find the cracks and we aim to develop a new method using machine learning Algorithms In addition numerical models are developed to understand the experiment and to predict the damage structures based on failure mechanisms.
Vorstellung des Aktivitätsfelds Erneuerbare Energie (2019)
Baeßler, Matthias ; Babutzka, Martin ; Trappe, Volker
Auf der Beiratssitzung des TF Energie wurde das Aktivitätsfeld Erneuerbare Energien in seinem breiten Spektrum (aber selektive Auswahl) vorgestellt.
Impact on a micro-reinforced UHPC: experimental studies vs. numerical modeling (2018)
Hille, Falk
Within the presented research project, experimental and numerical investigations were performed to develop a thin-shelled, modular, mobile element system made of a micro-reinforced ultra-high-performance ductile concrete (DUCON®). Material parameters were experimentally determined to adapt the material model within the numerical analysis applying the Drucker-Prager relationship. Afterwards, for validation of the numerical models, quasi-static and high-velocity impact tests were performed on plate-like structures. Finally, a suitable geometry of transportable barrier elements will be designed, which provides a maximum of resistance against impact by a minimum of weight and a maximum of mobility.
Impact on a micro-reinforced UHPC: Experimental studies versus numerical modeling (2018)
Kowitz, Astrid ; Wu, Cheng-Chieh ; Hille, Falk ; Helmerich, Rosemarie ; Kadoke, Daniel ; Gründer, Klaus-Peter ; Hauser, S. ; Schwarzinger, H.
Within the presented research project, experimental and numerical investigations were performed to develop a thin-shelled, modular, mobile element system made of a micro-reinforced ultra-high-performance ductile concrete (DUCON®). Material parameters were experimentally determined to adapt the material model within the numerical analysis applying the Drucker-Prager relationship. Afterwards, for validation of the numerical models, quasi-static and high-velocity impact tests were performed on plate-like structures. Finally, a suitable geometry of transportable barrier elements will be designed, which provides a maximum of resistance against impact by a minimum of weight and a maximum of mobility.
Digital X-ray cross laminography for evaluation of crack fields in large concrete blocks after impact (2017)
Ewert, Uwe
- Impact tests of concrete blocks - High energy facility for laminographic testing - Laminographic arrangement - Cross-Laminography - Measurement range extension by detector tiling - Reconstruction methods - Fast “shift averaging” method “next to base plane” - reconstruction --> Removal of reinforcement indications - 3D-Data analysis - Crack-Segmentation by „Template Matching“
Radiation Protection and On-Site Inspection of the Elevated Subway Construction with an Ir-192 Gamma-Source (2014)
Redmer, Bernhard
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