New simplified approach for obtaining a reliable plateau value in fatigue analysis of bituminous materials |
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| Affiliation: | 1. Department of Mining Machinery Engineering, Indian School of Mines, Dhanbad- 826004, India;2. School of Mechanical Engineering, KIIT-University, Bhubaneswar- 751024, India;1. Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;2. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China;1. Department of System Dynamics, Korea Institute of Machinery & Materials, 104 Shinsung-ro, Yuseong-gu, Daejeon 305-343 Republic of Korea;2. Department of Architectural Engineering, University of Namseoul, 21 Maeju-ri, Seonghwan-eup, Seobuk-gu, Cheonan 331-707, Republic of Korea;3. Department of Civil & Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea |
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| Abstract: | The Plateau Value (PV) based on the Ratio of Dissipated Energy Change (RDEC) approach has been proven to provide a unique relationship with the fatigue life, Nf, independent of loading mode, temperature and frequency. In this paper, a new simplified approach is proposed to compute the unique energy parameter PV. The results of this study show that applying the proposed method allows a unique fatigue power law to be produced and eliminates the ambiguity and variability in calculating PV. However, the study also shows that the PV-Nf fatigue curves for bituminous materials are dependent on material type which is contradictory to other studies dealing with PV. The study also highlights the importance of appropriately identifying the fatigue failure point prior to commencing any fatigue analysis. |
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