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Title |
Estimation of Fatigue Life at Asphalt Concrete Using Adaptive FE Meshes
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Authors |
김종헌(Jong-Heon Kim) ; 김성일(Sung-Il Kim) ; 김기현(Ki-Hyun Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2017.29.5.465 |
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Keywords |
피로 수명 ; 아스팔트 콘크리트 ; 적응적 유한 요소망 ; 탄성-점탄성 대응원리 ; 에너지 해방율 fatigue life ; asphalt concrete ; adaptive FE mesh ; elastic-viscoelastic correspondence principle ; energy release rate |
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Abstract |
The fatigue life at asphalt mixtures is numerically estimated using adaptive FE meshes. The propagating crack surface is explicitly represented in 3-D independently of the volume mesh. The simulation is performed along a sequence of incremental crack propagation steps, where a quasi-static linear elastic problem is solved using the generalized finite element method with the adaptive mesh only once at each crack step. The energy release rate, which is a crack front parameter controlling the fatigue crack growth in asphalt concrete, is computed using the elastic-viscoelastic correspondence principle at each crack step. This strategy is validated using available experimental data for the disc-shaped compact tension test.
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