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Article Dans Une Revue International Journal of Pressure Vessels and Piping Année : 2009

A local approach to creep fracture by slow crack growth in an MDPE : damage modelling

Résumé

Slow crack growth (SCG) behaviour has been investigated under creep conditions in a medium density ethylene-butene copolymer (MDPE) on both axisymmetrical Full Notched Creep Tensile (FNCT) and Double Edge Notched Tensile (DENT) samples tested at 60 °C. An attempt is made to predict the long-term failure of a component under creep loading conditions, using an incremental damage law. The experimental creep damage observations were compared to the creep stress-strain distributions calculated by finite element method. Such comparison can provide a damage evolution law as a function of the maximum principal stress and the creep strain. The failure criterion is expressed in terms of a critical creep damage over a critical distance. This model is applied to creep crack growth on the FNCT and DENT samples.

Dates et versions

hal-00367963 , version 1 (13-03-2009)

Identifiants

Citer

Hedi Ben Hadj Hamouda, Lucien Laiarinandrasana, Roland Piques. A local approach to creep fracture by slow crack growth in an MDPE : damage modelling. International Journal of Pressure Vessels and Piping, 2009, 86, pp.228-238. ⟨10.1016/j.ijpvp.2008.09.002⟩. ⟨hal-00367963⟩
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