FEM calculations, structure analyses and simulations

Development activities and services:


Evaluation of operational loads on statistical base

  • Single- or multi-parametric spectrum of structural loads and stresses in critical areas
  • Loading process generation for fatigue tests


Strength calculations

  • FEM calculations
  • Stress/strain mapping of linear material behaviour
  • Limit stage assessments respecting plasticity and fracture mechanics
  • Calculations of stability and  buckling resistance
  • Simulations of stability and buckling behaviour in time structure distortions simulation (crash cases)
  • Fatigue damage calculation
  • Simulation and calculation of fatigue crack propagation and service life assessment
  • Fastener elements and structural joints substantiation
  • Calculations of joins (mechanical fasteners, bonded joints etc.)
  • Virtual testing of new composite and hybrid material and structures (FML - fibre metal laminate)
  • Topology optimisation of parts and structures
  • Development of in-house codes for crack growth prediction and delamination
  • Development of methodologies and techniques for repair of metal and composite structures
  • Development of knowledge and software for fatigue crack growth retardation


Structure analyses

  • Structure strength and mass optimization
  • Structural damage analyses
  • Fatigue life assessments based on safe life, fail safe or damage tolerance design approaches, service life extension of aging structures
  • Residual strength of structures
  • Expertise of structural part fractures from the point of view of their cracking mechanism (for details please see also Metallography website)
  • Multi-physical simulation (acoustics, electromagnetism, FSI - Fluid Structure Interaction)


Analyses for structural dynamics 

  • Development of tools and methods for coupling CFD-CSM optimization analyses
  • Software development for tasks of aeroservoelasticity


Simulation of dynamic loads and crash analyses

  • Crash analyses and simulations  
  • Verification and optimization of models of real projectiles (bird, hail, rubber, etc.), development of artificial (synthetic) projectiles
  • Development of software for modelling of critical areas of composite structures by ply-by-ply method, application for analyses of BVID (Barely Visible Impact Damage) after impact.

 

EQUIPMENT:

  • Software CATIA V5, FEMAP, MSC PATRAN, MSC NASTRAN, ABAQUS, Tosca, fe-safe, LMS TecWare, LMS FALANCE, AutoVue, MITCalc, AFGROW
  • In-house software PREDIKCE for analyses of fatigue damage propagation
  • Optical systems for contact-less strain and stress measurements enabling the computational method verification
  • Lab for acoustic load application (PWT - Progressive Wave Tube), exposition of real structure to fatigue acoustic load
  • Database of material properties

 

research projects:

  • ADATO - “Operational life increase of small transport aircraft using Damage Tolerance philosophy“, (2009-2013, MIT – TIP, project No. FR-TI1/475)
  • THERMOPLASTIC COMPOSITES - “Verification methods for design and production technology for parts of advanced structures made of reinforced thermoplastic”, (2009-2012. MIT – TIP1, project No. FR-TI1/463)
  • SONACA - “Fixed leading edge of composite wing of CS100 airplane“, (2009-2013, MIT – TIP1, project No. FR-TI1/291)
  • CERFAC – “Cost Effective Reinforcement of Fastener Areas in Composites“, (2010-2014, FP7 EU, contract No. 266026)
  • INMA – “Innovative manufacturing of Ti sheet parts for cost-efficiency and flexibility“, (2010-2014, FP7 EU, contract No. 266208)
  • INKOM – “Integration of composite materials into airframe of small transport aircraft”, (2012-2015, MIT-TIP, contract No. FR-TI4/543)
  • AJT – “Advanced wing of AJT”, (2012-2015, MIT-TIP, project No.
    FR-TI4/603)
  • KC-390 - “Fixed leading edge of KC-390 aircraft“, (2012-2015, MIT – TIP, project No.FR-TI4/600)
  • MOSTA – “Modernization of small transport aircraft in order to increase of efficiency and operational economy“, (2010-2016, MIT-TIP, project No. FR-TI2/557)
  • THERMOPLASTS – “Research and development of modern production technologies for parts and applications made of high performance composites with thermoplastic matrix”, (2013-2016, TAČR – ALFA3, project No. TA03010209)
  • CANAL – “Creating Nonconventional Laminates”, (2013-2017, EK - 7th Framework Program of the EU, contract No. 605583)
  • AFLONEXT – “2nd Generation Active Wing – Active Flow- Loads & Noise control on next generation wing“, (2013-2018, EK - 7th Framework Program of the EU, project No. 604013)
  • ACASIAS -“Advanced Concepts for Aero-Structures with Integrated Antennas and Sensors“,  (2017-2020, EK – H2020, contract No. 723167)
  • THERMOPLASTS – “Design and technology development for aircraft primary structural parts of advanced shape made of thermoplastic materials”, (2018-2020, MIT ministry, program TRIO, project No. FV30033)
  • DREAM  - “Design and Realization of equipped engine compartments including cowling for a fast compound rotorcraft”, (2017-2021, JU – Clean Sky 2, contract No. 737955 – CS2)
  • LATTE – “Full Fairing for Main Rotor Head of the LifeRCraft demonstrator ”, (2017-2021, JU – Clean Sky 2, contract No. 755483 – CS2)
  • “Smart and reliable aircraft structures“, partial objectives 4-5 (2018-2022, institutional funding MIT via “DKRVO”).

 

CONTACT person:

Ing. Radek Doubrava, Ph.D., Head of Structure Analyses Group, VZLU
tel: +420 225 115 134, e-mail: doubrava@vzlu.cz