Concrete Structure Generation from Computed Tomography (CT)

¨ Braunschweig
Technische Universitat
Institut fur
¨ Angewandte Mechanik
Campus Nord
¨
Bienroder Weg 87, Gebaude
1411
38106 Braunschweig
Bachelor-/Studien-/Masterarbeit
Prof. Dr.-Ing. Laura De Lorenzis
Concrete Structure Generation from
www.tu-braunschweig.de/iam
Computed Tomography (CT)
Concrete is a widely used and economically important building material. To understand its behavior, numerical simulations, e.g., with finite elements, may be
used. These models need information on the constituents’ mechanical behavior
(constitutive models) and on the geometry of the problem. Computed tomography (CT) is a method for obtaining volumetric images of material samples. To use
them in a finite element simulation, the different phases need to be separated
(segmentation) and meshes must be generated.
Geometric Structure of Concrete from Computed Tomography
The aim of this work is to evaluate image processing strategies for segmentation
of CT images of concrete, to assess mesh and/or geometry generation techniques and to investigate the impact of different processing strategies on the
predicted mechanical behavior.
Prerequisites: Very good Matlab skills. Very good knowledge of the finite element
method and at least one common FE software package. Experience in image
processing preferred.
Contact
Dr. Roland Kruse
+49 (0) 531 391 94359
[email protected]
¨ Braunschweig
Technische Universitat
Institut fur
¨ Angewandte Mechanik
Campus Nord
¨
Bienroder Weg 87, Gebaude
1411
38106 Braunschweig
Scope of work
The assignment includes the following topics:
Prof. Dr.-Ing. Laura De Lorenzis
www.tu-braunschweig.de/iam
• Use of commercial CT image processing software (Avizo) to evaluate preprocessing and image segmentation strategies, on different types of concrete.
• Mesh and/or geometry generation from segmented images.
• Implementation of these processes in Matlab.
• Finite element simulations to estimate the effect of image processing on
predicted mechanical behavior.
• Report.
This work may be split into several parts (e.g. segmentation, geometry reconstruction), esp. in case of a Bachelor’s thesis or specialization project (each 3
months).
Literature
• Dai, Q.: Two- and three-dimensional micromechanical viscoelastic finite element modeling of stone-based materials with X-ray computed tomography
images, Construction and Building Materials 25, 2011
¨
¨
• Hafner,
S., Eckardt, S., Luther, T., Konke,
C.: Mesoscale modeling of concrete: Geometry and numerics, Computers and Structures 84, 2006
• Onifade, I.: Internal Structure Characterization of Asphalt Concrete using XRay Tomography, Master of Science Thesis, Royal Institute of Technology
(KTH), 2013
• Razmjoo, A., Poursaee, A.: Finite Element Modeling of Concrete Based on
Quantitative Computed Tomography (QCT), 1st Annual Graduate Research
and Discovery Symposium, Clemson University, 2013
Contact
Dr. Roland Kruse
+49 (0) 531 391 94359
[email protected]