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DUBRAVKA MIJUCA Faculty of Mathematics University of Belgrade Serbia E-mail: dmijuca@matf.bg ac.yu

ON THE MORE RELIABLE INTRODUCTION OF THE RESIDUAL STRESSES IN THE THERMO-MECHANICAL ANALYSIS OF LAYERED STRUCTURES. DUBRAVKA MIJUCA Faculty of Mathematics University of Belgrade Serbia E-mail: dmijuca@matf.bg ac.yu. Hypothetical example The blade is of glass fibre/epoxy matrix pre-pregs

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DUBRAVKA MIJUCA Faculty of Mathematics University of Belgrade Serbia E-mail: dmijuca@matf.bg ac.yu

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  1. ON THE MORE RELIABLE INTRODUCTION OF THE RESIDUAL STRESSES IN THE THERMO-MECHANICAL ANALYSIS OF LAYERED STRUCTURES DUBRAVKA MIJUCA Faculty of Mathematics University of Belgrade Serbia E-mail: dmijuca@matf.bg ac.yu NAFEMS seminar, 31 May - 1 June 2006 Prediction and Modelling of Failure Using FEA

  2. Hypothetical example • The blade is of glass fibre/epoxy matrix pre-pregs • The gear box is made of fibre/epoxy • The adhesive is made of epoxy • External load - gravitational

  3. Mijuca Dubravka, Finite element FEMIX HC EL

  4. Delamination Mijuca Dubravka, Finite element FEMIX HC EL Debonding Crack

  5. Gravitational Load Mijuca Dubravka, Finite element FEMIX HC EL Gravitational Load and residual stress 1E6MPa

  6. Mijuca Dubravka, Finite element FEMIX HC EL

  7. Mijuca Dubravka, Finite element FEMIX HC EL 18789 dof’s per displacement vector and stress tensor 76.36 sec on the notebook 1.4GHz Intel Pentium (R) 512MB RAM

  8. Pressure load on the upper side Mijuca Dubravka, Finite element FEMIX HC EL

  9. The reliable fully three-dimensional reliable primal-mixed approach is recommended for the use in the analysis of layered structures where residual stresses should be taken in the account Reliable FEA consultancy and design dmijuca@matf.bg.ac.yu

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