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Communication Dans Un Congrès Année : 2022

Multi-scale modeling of the thermo-viscoelastic behavior of 3D woven composites

Résumé

A multi-scale modeling strategy is proposed that takes into account the temperature and cure dependence of the viscoelastic behavior of the constituent materials of a composite material and the effects of stress relaxation on thermal expansion and chemical shrinkage. A homogenization strategy is presented, which, starting from the constituent behaviors, yields the homogenized viscoelastic behavior of the composite with time-dependent expansion coefficients. This time-dependence is a direct consequence of the viscoelastic behavior of the constituents, as their expansion coefficients are supposed to be time-independent. In the simulation of a heating process, the model predicts sign changes in the thermal strain rate due to residual stress relaxation close to the glass transition temperature, which cannot be obtained with classical thermo-elastic homogenization methods.
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Dates et versions

hal-03842336 , version 1 (07-11-2022)

Identifiants

  • HAL Id : hal-03842336 , version 1

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Martin Hirsekorn, Lionel Marcin, Thierry Godon. Multi-scale modeling of the thermo-viscoelastic behavior of 3D woven composites. ECCM 20, Jun 2022, Lausanne, Switzerland. ⟨hal-03842336⟩
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