Thermomechanical modelling for fatigue damage of bituminous materials

Title: Thermomechanical modelling for fatigue damage of bituminous materials
Author(s): D. Bodin, F. Belzung, C. de la Roche, A. Chabot
Paper category : conference
Book title: Fifth International RILEM Conference on Reflective Cracking in Pavements
Editor(s): C. Petit, I.L. Al-Qadi and A. Millien
Print-ISBN: 2-912143-47-0
e-ISBN: 2912143764
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 675 - 682
Total Pages: 8
Nb references: 9
Language: English

Abstract: To assess fatigue cracking performance, pavement materials are tested under cyclic loading during fatigue laboratory tests. Fatigue damage is generally assessed using the global specimen stiffness decrease. This classical fatigue life interpretation can be modified by the softening effect of thermal increase due to viscoelasticity which is not real micro-cracking induced damage. Here the material is modelled as a thermo-viscoelastic damageable material tested under sinusoidal loading. Both thermal and mechanical aspects and their coupling are taken into account leading to a complete constitutive model.Simulations are performed on cylindrical tension compression tests assuming a purely radial heat transfer. Comparison between the model and experimental data regarding temperature measurements and the global stiffness evolution lead to a good agreement.This approach points out the importance of thermal effects in fatigue tests and the limitation of classical approaches when thermal effects become important.

Online publication: 2004-04-15
Publication type : full_text
Public price (Euros): 0.00