Parameter optimisation of a 2D finite element model to investigate the microstructural fracture behaviour of asphalt mixtures
作者： Jonas Kollmann , Guoyang Lu , Pengfei Liu , Qinyan Xing , Dawei Wang
DOI: 10.1016/J.TAFMEC.2019.102319
关键词: Fracture (geology) 、 Cohesive zone model 、 Finite element method 、 Structural engineering 、 Tensile testing 、 Microstructure 、 Materials science 、 Asphalt 、 Microscale chemistry 、 Durability
摘要: Abstract To mitigate the risk of asphalt degradation pavement surfaces and to increase durability, there is a need investigate fracture behaviour mixtures at low intermediate temperatures. The indirect tensile test (IDT) widely used characterise resistance in terms strengths mixtures. This paper presents an optimised method for two-dimensional (2D) finite element (FE) modelling IDT simulate crack initiation propagation within on microscale. X-ray computed tomography (X-ray CT) scanning digital image processing (DIP) techniques were applied detect reconstruct microstructure specimens. Cohesive zone modeling (CZM) FE simulations represent behaviour. procedure parameter optimisation are described comprehensively. Four important parameters governing numerical solutions during simulation process based counts accuracy as well computational efficiency. models also validated experimental results. As case study, influence loading orientation was investigated. validation study prove reliability applicability proposed algorithm; further improvements will be carried out facilitate development design process.
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