Our InstituteTeam
Fadi Aldakheel

Dr.-Ing. Fadi Aldakheel

Dr.-Ing. Fadi Aldakheel
Address
An der Universität 1
30823 Garbsen
Building
Room
308
Address
An der Universität 1
30823 Garbsen
Building
Room
308
Positions
Gruppenleitung
Institut für Kontinuumsmechanik
Oberingenieurinnen/Oberingenieure
Institut für Kontinuumsmechanik
  • Forschungsprojekte

    Virtual Elements For Engineering Appications

    • 2D VEM for crack-propagation
      Leaders: F. Aldakheel, B. Hudobivnik, P. Wriggers
      Team: A. Hussein
      Year: 2018
      Sponsors: IRTG 1627
    • Virtual element method (VEM) for phase-field modeling of brittle and ductile fracture
      Leaders: F. Aldakheel, B. Hudobivnik, P. Wriggers
      Year: 2018
      Sponsors: DFG SPP 1748
    • Virtual Element Method for Dynamic Applications
      The Virtual Element Method is a recent developed discretization method, which can be seen as an extension of the classical Galerkin finite element method. It has been applied to various engineering fields, such as elasto-plasticity, multiphysics, damage and fracture mechanics. This project focuses on the extension of VEM towards dynamic applications. In the first part the appropriate computation of the Massmatrix regarding the vitual element ansatzspace will be done. In future works, VEM will be applied to engineering problems, considering the dynamic behavior.
      Leaders: F. Aldakheel, B. Hudobivnik, P. Wriggers
      Team: M. Cihan
      Year: 2019
    • Virtual Element Method for 3D Contact
      Contact plays a very important role in engineering problems, where two or more bodies interact with each other through their surfaces. Many techniques were developed in the past, to formulate the contact constraint at the contact interface between two bodies. Nevertheless, VEM provides efficient and robust properties to enforce the contact constraint through the contact interface. Investigations in 2D have been done so far. This work aims an extensions of VEM to 3D contact problems.
      Leaders: F. Aldakheel, B. Hudobivnik, P. Wriggers
      Team: M. Cihan
      Year: 2020

    Phase Field Modeling of Fracture in Multi-Field Environments

    Multiscale and multiphysics material modelling of polycrystalline metals and forming processes

    • Modelling and simulation of the joining zone during the tailored forming process
      In this project, micromechanically motivated thermo-chemo-mechanical material models are developed on a microscopic length scale and transformed to an effective macroscopic material model. In order to achieve a high mechanical strength of the hybrid solid component, these material models are used to evaluate the sensitivity of different process parameters after joining and during forming and heat treatment. Moreover, with aid of the the evaluation results the material behaviour of the joining zone can be accurately adjusted during the Tailored Forming process.
      Leaders: F. Aldakheel, P. Wriggers
      Team: C. Böhm, F. Töller
      Year: 2019
      Sponsors: DFG im Rahmen des SFB 1153
    • Water-induced damage mechanisms of cyclic loaded high-performance concretes
      The use of offshore wind energy is expanding and fatigue-loaded concrete structures are built that are submerged in water. This currently already applies to so-called grouted joints, where high-strength fine-grained concrete (grout) is used in the steel support structures of offshore wind turbines. Such constructions are subjected to several hundred million load cycles within their service life. An increased water content in the concrete results from the offshore exposure which is principally different to onshore constructions,. Comparatively few investigations of fatigue-tested concrete specimens immersed in water are documented in the literature. Despite the fact, that considerably scatterings occur in these results a clear tendency can be observed. Specimens that are immersed in water have a significantly lower fatigue resistance compared with specimens tested in air. Some investigations also show that fatigue-loaded concrete specimens immersed in water have a significant change in their fracture behaviour compared with specimens tested in air. This can be seen, in tests, for example, by ascending air bubbles, wash-outs of fine particles and premature crack initiation.Water-induced damage mechanisms in fatigue-loaded concrete have indeed been recognised in the past, but they were not identified and described with sufficient precision. Consequently, they cannot be quantified reliably. Based on the existing knowledge gap, the vast majority of these mechanisms have currently escaped numerical modelling and simulation.The aim of this research project is to understand, analyse and quantify macroscopically water-induced damage mechanisms of fatigue-loaded high-performance concretes in the Experimental-Virtual-Lab (EVL) with complementary very latest state-of-the-art experimental methods. At the same time, models will be created and numerically implemented on a micromechanical basis that enables proving of hypotheses that will be derived from the experimental investigations. The structural data serve for the validation of these models; the data will be determined by µCT scans, NMR measurements and mercury intrusion porosimetry.After a first clarification of the origin of mechanisms by the EVL, modelling at the macroscopic level will be attempted on the basis of the micromechanical investigations. In this way it will be verified, how the water influences the degradation behaviour of fatigue-loaded high-performance concretes and which additional active, water-induced damage mechanisms are decisively involved in the degradation process. It will be possible for the first time to carry out a prediction of the degradation behaviour of fatigue-loaded high-performance concretes immersed in water based on microstructurally orientated parameters.
      Leaders: Fadi Aldakheel, Peter Wriggers
      Year: 2020
      Sponsors: DFG SPP 2020, zweite Förderperiode
      Lifespan: 3 Jahre
  • Lehrveranstaltungen - Vorlesungen
    Leibniz Universität Hannover
    SoSe 2020Technische Mechanik IV
    SoSe 2018 - SoSe 2020Continuum Mechanics II
    SoSe 2018 - SoSe 2020Numerical Implementation of Constitutive Models
    WiSe 2017/18 - WiSe 2019/20Continuum Mechanics I
    Universität Stuttgart
    SoSe 2016 - SoSe 2017Micromechanics of Materials and Homogenization Methods
    WiSe 2016/17Computational Mechanics of Materials

RESEARCH INTERESTS

  • Variational principles
  • Phase field approach
  • Multi-scale modeling
  • Gradient-extended theory
  • Coupled problems
  • Material modeling
  • Theory of Porous Media
  • Numerical analysis
  • Multiphysics
  • Fatigue/Fracture/Damage
  • Finite element technology (FEM)
  • Virtual element method (VEM)
  • Contact mechanics
  • Experimental validation

Education

Aug. 2017 - Jun. 2020Habilitation, Institute of continuum mechanics
Leibniz Universität Hannover LUH, Germany
Thesis: Simulation of Fracture Processes using Global-Local Approach and Virtual Elements
Submission Day: 15.06.2020
Supervisor: Prof. Peter Wriggers
Co-supervisor: Prof. Laura De Lorenzis
Sep. 2011 – May 2016Ph.D., Institute of Applied Mechanics
University of Stuttgart, Germany
Thesis: Mechanics of Nonlocal Dissipative Solids: Gradient Plasticityand Phase Field Modeling of Ductile Fracture
http://elib.uni-stuttgart.de/handle/11682/8820
Supervisor: Prof. Christian Miehe
Co-supervisor: Prof. Jörn Mosler
Oct. 2009 – Aug. 2011M.Sc. Degree in Computational Mechanics of Materials and Structures (COMMAS), University of Stuttgart, Germany
Thesis: Computational Homogenization in Micro-Electro-Elasticity
https://www.researchgate.net/publication/324132798
Supervisor: Prof. Christian Miehe
Sep. 2001 – Jun. 2006Bachelor of Mechanical Engineering,
Power Department, University of Aleppo, Syria

Work Experience

since Mar. 2020Chief Engineer (Oberingenieur) at the Institute of continuum mechanics, LUH
since Aug. 2017

Group Leader ”Material Modeling and Damage Mechanics” at the Institute of continuum mechanics, LUH
- Writing proposals
- Teaching masters and undergraduate courses
- Supervising Master theses and students projects
- Supervising Ph.D. students in various research directions

Jun. 2016 – Jul. 2017

Postdoctoral Research Associate at the Institute of Applied Mechanics (CE), University of Stuttgart, Germany
- Teaching masters courses, setting up and correcting exams
- Supervising Master theses from university and industry
- Working with Ph.D. students on different research topics

Jul. 2014 – Jul. 2017Course Director of the international Master Program “Computational Mechanics of Materials and Structures” (COMMAS) at University of Stuttgart
Jul. 2014 – Jul. 2017Local Director of the EU Excellence Program: “Erasmus Mundus Master of Science in Computational Mechanics”
Jan. 2012 – Jun. 2014Examination Officer of the international Master Program “Computational Mechanics of Materials and Structures” (COMMAS) University of Stuttgart, Germany
Jul. 2007 – Aug. 2009

Teaching assistant at the Faculty of Petrochemical Engineering Alfurat University, Syria
- Teaching undergraduate courses
- Setting up and correcting exams

Jun. 2006 – Jun. 2007

HVAC engineer at CIAT Middle east north, Aleppo - Syria
- Sales and technical support engineer
- Designing of heating and cooling systems for building
- Preparation of financial offers

Aug. 2005 – Sep. 2005

IAESTE YUGOSLAVIA - Internships
- Thermal Power Plant Nikola Tesla plc in Obrenovac, Serbia and Montenegro
- Minel Elvo company in Novi Beograd, Serbia and Montenegro

AWARDS

2020Einladung zum Berufungsverfahren für die W3-Professur Kontinuumsmechanik der Technischen Universität Darmstadt
2020Richard-von-Mises-Preis of the International Association of Applied Mathematics and Mechanics (GAMM)
2019 "Best Paper Awards" International Federation for Structural Concrete
2011DAAD scholarship in Master of Science (COMMAS) at University of Stuttgart
2002-2006Honor roll certificates at Faculty of mechanical engineering, University of Aleppo, Syria