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- Title
Modeling of viscoplastic rate-dependent hardening-softening behavior of hot mix asphalt in compression.
- Authors
Taeyoung Yun; Kim, Y. Richard
- Abstract
The objective of this paper is to model viscoplastic rate-dependent hardening-softening behavior that is experimentally observed from hot mix asphalt (HMA) under repetitive creep and recovery loading in compression. A differential equation is utilized to incorporate the effects of the stress history into yield stress, and an internal variable representing rate dependence in the equation is set as a function of the viscoplastic strain rate to address the change in rate dependence of the material due to gradual hardening. Also, a separate rate-dependent function concept is adopted to describe the difference in rate dependence of the yield stress during unloading and loading. The developed viscoplastic model is applied using the time-temperature superposition principle and shows good agreement with the measured viscoplastic responses of HMA under repetitive creep and recovery loading with various load levels and rest periods.
- Publication
Mechanics of Time-Dependent Materials, 2011, Vol 15, Issue 1, p89
- ISSN
1385-2000
- Publication type
Article
- DOI
10.1007/s11043-010-9116-7