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Computational analysis of the creep behaviour of bituminous mixtures
Highlights A 3D constitutive model for the bituminous mixtures creep analysis was developed. The 3D model was characterised by inviscid plasticity and isotropic hardening. The Helmholtz free energy and the Clausius–Duhem inequality were introduced. The model was calibrated on the basis of experimental uniaxial creep recovery tests. The validation of the model was based on 3D FEM analysis of creep recovery tests.
Abstract This report introduces a visco-elasto-plastic constitutive model for the characterisation of stress–strain behaviour in bituminous mixtures. With the introduction of the Helmholtz free energy and using the concept of internal variables, it has been possible to express a plastic flow law, characterised by isotropic hardening. The formulation of the constitutive relationship has been developed in such a way as to verify a priori the universal dissipation principle, expressed by the Clausius–Duhem dissipative inequality. The model has been calibrated and validated on the basis of the creep recovery response of two different bituminous mixtures under various stress levels and loading time.
Computational analysis of the creep behaviour of bituminous mixtures
Highlights A 3D constitutive model for the bituminous mixtures creep analysis was developed. The 3D model was characterised by inviscid plasticity and isotropic hardening. The Helmholtz free energy and the Clausius–Duhem inequality were introduced. The model was calibrated on the basis of experimental uniaxial creep recovery tests. The validation of the model was based on 3D FEM analysis of creep recovery tests.
Abstract This report introduces a visco-elasto-plastic constitutive model for the characterisation of stress–strain behaviour in bituminous mixtures. With the introduction of the Helmholtz free energy and using the concept of internal variables, it has been possible to express a plastic flow law, characterised by isotropic hardening. The formulation of the constitutive relationship has been developed in such a way as to verify a priori the universal dissipation principle, expressed by the Clausius–Duhem dissipative inequality. The model has been calibrated and validated on the basis of the creep recovery response of two different bituminous mixtures under various stress levels and loading time.
Computational analysis of the creep behaviour of bituminous mixtures
Pasetto, Marco (author) / Baldo, Nicola (author)
Construction and Building Materials ; 94 ; 784-790
2015-07-12
7 pages
Article (Journal)
Electronic Resource
English
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