Determining the Cracking Growth Behavior of Asphalt Mixture Using Heterogeneous Modeling | ||
| مهندسی زیر ساخت های حمل و نقل | ||
| Article 1, Volume 6, Issue 1 - Serial Number 21, June 2020, Pages 1-12 PDF (1.23 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.22075/jtie.2019.16511.1350 | ||
| Authors | ||
| Hassan Ziari1; Behrooz ghobadipour2; Majid Jebalbarezi* 3 | ||
| 1Asphalt Mixtures and Bitumen Research Center (ABRC), Iran University of Science and Technology (IUST), Narmak, 16846-13114 Tehran, Iran | ||
| 2Civil engineering department, Iran University of science and technology, Tehran, Iran. | ||
| 3School of Civil Engineering, Iran University of Science & Technology, Tehran, Iran | ||
| Receive Date: 16 November 2018, Revise Date: 19 January 2019, Accept Date: 10 March 2019 | ||
| Abstract | ||
| In this study, cracking growth behavior of asphalt mixture was investigated by heterogeneous modeling. First, the asphalt samples are created by using generation and random distribution algorithm of the aggregates. These asphalt samples are numerically analyzed and failure parameters of the asphalt mixture are calculated. Then, the effect of aggregate distribution, elasticity modulus of aggregates, Poisson coefficient of aggregates, elasticity modulus of mastic, Poisson coefficient of mastic, and loading under combined modes on failure parameters are evaluated. Results showed that heterogeneous modeling considerably affects the mechanical responses of asphalt mixture. Position of the crack tip has significant effect on value and sign of the stress intensity factors, such that if the crack tip is located in the mastic region, the mode I of stress intensity factor in homogeneous modeling will be less than heterogeneous modeling. But if the crack tip is located in the aggregates, the stress intensity factor of heterogeneous modeling will be greater than homogeneous modeling. | ||
| Keywords | ||
| Finite element analysis; Heterogeneous modeling; Failure mechanics; Stress intensity factor; Generation and random distribution algorithm of aggregates | ||
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