Finite element simulation of the thermoviscoplastic behaviour of bituminous concrete

✍ Scribed by Royis, P.; Seignol, J. F.

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 303 KB
• Volume: 23
• Category: Article
• ISSN: 0363-9061
• DOI: 10.1002/(sici)1096-9853(199906)23:7<595::aid-nag985>3.0.co;2-v

✦ Synopsis

The general framework of the paper deals with the "nite element modelling of thermomechanical problems involving viscous materials. The study focuses on the statement of constitutive equations describing the thermoviscoplastic behaviour of bituminous concrete, as well as on their implementation in a "nite element program. After stating the general equations of the space-and time-continuous problem and the constitutive relations governing the viscoplastic component of the bituminous concrete behaviour, we deal with their integration over "nite time steps, considering two di!erent schemes. Eventually, two sets of numerical results are presented. The "rst one, an homogeneous triaxial test, is used to compare those schemes, whereas the second one consists of numerical simulations of real-size experiments performed on a road structure subjected to thermal and mechanical loadings. By comparing the numerical results with experimental ones, it allows us to test the "nite element code on a more complex and realistic problem.