A bounding surface elasto‐viscoplastic constitutive model for non‐isothermal cyclic analysis of asphaltic materials. (21st September 2016)

• Record Type: Journal Article
• Authors: Shahbodagh, B.; Habte, M.A.; Khoshghalb, A.; Khalili, N.
• Is Part Of: International journal for numerical and analytical methods in geomechanics. Volume 41:Number 5(2017)
• Page Start: 721
• Page End: 739
• Publication Date: 2016-09-21
• Subjects: elasto‐viscoplasticity -- cyclic analysis -- bounding surface plasticity -- asphaltic materials -- non‐isothermal; Soil mechanics -- Mathematics -- Periodicals; Rock mechanics -- Mathematics -- Periodicals; 624.1510151
• DOI: 10.1002/nag.2574
• Languages: English
• ISSNs: 0363-9061

Abstract

Summary: An elasto‐viscoplastic constitutive model for asphaltic materials is presented within the context of bounding surface plasticity theory, taking into account the effects of the stress state, void binder degree of saturation, temperature and strain rate on the material behaviour. A stress state dependent non‐linear elasticity model is introduced to represent time‐independent recoverable portion of the deformation. The consistent visco‐plasticity framework is utilised to capture the rate‐dependent, non‐recoverable strain components. The material parameters introduced in the model are identified, and their determination from conventional laboratory tests is discussed. The capability of the model to reproduce experimentally observed response of asphaltic materials is demonstrated through numerical simulations of several laboratory test data from the literature. Copyright © 2016 John Wiley & Sons, Ltd.