Alamnie Mequanent Mulugeta, Taddesse Ephrem, Hoff Inge
Department of Engineering Science, University of Agder, 4879 Grimstad, Norway.
Department of Civil and Environmental Engineering, Norwegian Science and Technology University (NTNU), 7491 Trondheim, Norway.
Materials (Basel). 2022 May 12;15(10):3480. doi: 10.3390/ma15103480.
Permanent deformation is one of the dominant asphalt concrete damages. Significant progress has been made to realistically predict the damage. In the last decade, the mechanistic approach has been the focus of research, and the fundamental theories of viscoelasticity, viscoplasticity, continuum mechanics, and micromechanics are applied to develop the material laws (constitutive equations). This paper reviews the advancement of permanent deformation models including analogical, microstructural, and continuum-based methods. Pavement analysis using the nonlinear damage approach (PANDA) is the most comprehensive and theoretically sound approach that is available in the literature. The model coupled different damages and other phenomena (such as cracking, moisture, and phenomena such as healing, aging, etc.). The anisotropic microstructure approach can be incorporated into the PANDA approach for a more realistic prediction. Moreover, the interaction of fatigue and permanent deformation is the gap that is lacking in the literature. The mechanistic approaches have the capacity to couple these damages for unified asphalt concrete damage prediction.
永久变形是沥青混凝土的主要损伤形式之一。在实际预测这种损伤方面已经取得了重大进展。在过去十年中，力学方法一直是研究的重点，粘弹性、粘塑性、连续介质力学和微观力学的基本理论被用于建立材料定律（本构方程）。本文综述了包括类比法、微观结构法和基于连续介质法在内的永久变形模型的进展。使用非线性损伤方法的路面分析（PANDA）是文献中最全面且理论上最合理的方法。该模型耦合了不同的损伤和其他现象（如开裂、水分以及愈合、老化等现象）。各向异性微观结构方法可以纳入PANDA方法以进行更实际的预测。此外，疲劳与永久变形的相互作用是文献中所缺乏的研究空白。力学方法有能力将这些损伤耦合起来以进行统一的沥青混凝土损伤预测。
