Chair of Aircraft Structures

Project Laboratory
Research Projects

The Laboratory, AeroDamageLab, was established in the 2009 at Faculty of Mechanical Engineering and Naval Architecture (FMENA), University of Zagreb, within the framework of the Technology Project TP-07/0120-30 “Numerical Modelling of Damage in Aeronautical Structures”. One of the objectives is to continue cooperation with flag carrier airline „Croatia Airlines“ in the development of technology aimed at determining foreign object damage (e.g. due to bird impact) in the composite, sandwich as well as metallic aeronautical structures.

The methodology is based on explicit integration methods used within finite element program Abaqus/Explicit, along with the corresponding failure criteria at impact on aluminium, sandwich or composite structures. Special attention was given to the modelling of impactor/bird (using EOS, ALE) in order to be able to compare numerical results with the available references.

The focus of current research activities is application of multiscale methodlogy in the damage modelling of fibre reinforced composite materials. The High Fidelity Generalized Method of Cells (HFGMC) has been used as a micromechanical model to model damage processes at the constituent level. Coupling between the micromechanical model and the finite element analysis has been achieved via Abaqus/Explicit user material subroutine VUMAT.

Furthermore, the Laboratory is the focal point for development of numerical methods in the mechanics of composites engineering.

  • development of new numerical methods and constitutive laws in the field of damage mechanics, applied in the composites engineering
  • stress analysis of composite and metallic structures, primarily in the aeronautics, as well as in the other areas of application
  • expertise and creation of technical reports in the area of aeronautical engineering and other fields of aeronautics
  • collaboration in FP7 and other international scientific projects in the field of composites aeronautical engineering and composite structures with particular aim at application of numerical methods
  • collaboration in engineering / scientific projects (such as national Technology Projects, national Scientific Projects, EUREKA projects etc.) in the fields of composites engineering and aeronautical engineering in general sense
  • consulting support in the field of aeronautical engineering

  • Workstations with 2 x 4 core processors
  • other supporting computational equipment (notebooks, printers, scanners, overhead projectors etc.)

Lectures in Subjects:

Within activities of the Laboratory, cooperation has been established with:

and other institutions (through preparation and work on joint projects, invited lectures or presentation of research results).

D. Ivančević, I. Smojver, Explicit Multiscale Modelling of Impact Damage on Laminated Composites – Part I: Validation of the Micromechanical Model, Composite structures. 145 (2016); 248–258 doi: 10.1016/j.compstruct.2016.02.048

D. Ivančević, I. Smojver, Explicit Multiscale Modelling of Impact Damage on Laminated Composites – Part II: Multiscale Analyses, Composite structures. 145 (2016); 259–268 doi: 10.1016/j.compstruct.2016.02.049

D. Ivančević, I. Smojver, Micromechanical Damage Modelling using a Two-scale Method for Laminated Composite Structures. Composite Structures. 108 (2014) ; 223–233 doi: 10.1016/j.compstruct.2013.09.028

I. Smojver, D. Ivančević, Advanced Modelling of Bird Strike on High Lift Devices Using Hybrid Eulerian-Lagrangian Formulation. Aerospace science and technology. 23 (2012) ; 224–232 doi: 10.1016/j.ast.2011.07.010

D. Ivančević, I. Smojver, Multiscale Approach to Damage Analysis of Laminated Composite Structures, Simulia Community Conference, 15.05. – 17.05. 2012., Providence, RI

D. Ivančević, I. Smojver, Hybrid Approach in Bird Strike Damage Prediction on Aeronautical Composite Structures, Composite Structures, 94, 15 – 23, 2011 doi: 10.1016/j.compstruct. 2011.07.028

I. Smojver, D. Ivančević, Bird Strike Damage Analysis in Aircraft Structures Using Abaqus/Explicit and Coupled Eulerian Lagrangian Approach , Composites Science and Technology, 71, 489 – 498, 2011 doi: 10.1016/j.compscitech.2010.12.0241

Project Laboratory for Numerical Modelling of Damage in Aeronautical Structures - AeroDamageLab
University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture
Department of Aeronautical Engineering
I. Lučića 5, HR-10000 Zagreb, Croatia

Permanent members:

   Prof. Dr. Sc. Ivica Smojver

   Asst. Prof. Darko Ivančević

phone & fax: +385 1 6168 267 (Prof. Dr. Sc. Ivica Smojver)

Administrator        LAST CHANGE: 28.03.2017



Lecture by Dr. Evan J. PINEDA: "Homogenization Techniques for Multiscale Modeling of Composite Structures Exhibiting Strain Localization" at FMENA, 07.10.2016
Simulia Insights - Information on Laboratory results presented on pp. 21



Micromechanical stress distribution within the unit cell [GPa] - 100 x 100 subcells.

Effect of unit cell refinement on distribution of Micromechanics of Failure matrix damage initiation criterion.

Comparison of ply-level matrix failure criteria with micromechanical failure criteria.

1.81 kg bird impact on inboard flap at 100 m/s, CEL model. Contours of Hashin’s fiber tensile failure criterion are shown.

Penetration of the lower flap skin impacted by a 1.81 kg bird at 100 m/s. Eulerian Volume Fraction contours are shown, cross-sectional view.

Slat skin deflection impacted by a 1.81 kg bird at 100 m/s.

CEL model of bird strike on the flap structure.

Comparison of Hashin's tensile failure criteria of lower flap skin impacted by a 0.45 kg and a 1.81 kg bird.

Deformation of the bird material during the impact.

Penetration of the 1.81 kg Lagrangian bird model through the flap leading edge sandwich structure.