3D meso-scale fracture modelling and validation of concrete based on in-situ X-ray Computed Tomography images using damage plasticity model. (15th August 2015)

• Record Type: Journal Article
• Authors: Huang, Yujie; Yang, Zhenjun; Ren, Wenyuan; Liu, Guohua; Zhang, Chuanzeng
• Is Part Of: International journal of solids and structures. Volume 67/68(2015)
• Page Start: 340
• Page End: 352
• Publication Date: 2015-08-15
• Subjects: Mesoscale modelling of concrete -- In-situ X-ray Computed Tomography -- Voxel hexahedron meshing -- 3D image based modelling -- Damage plasticity model; Mechanics, Applied -- Periodicals; Structural analysis (Engineering) -- Periodicals; Elastic solids -- Periodicals; Mécanique appliquée -- Périodiques; Constructions, Théorie des -- Périodiques; Solides élastiques -- Périodiques; Elastic solids; Mechanics, Applied; Structural analysis (Engineering); Periodicals; 624.18
• DOI: 10.1016/j.ijsolstr.2015.05.002
• Languages: English
• ISSNs: 0020-7683

Abstract

Abstract: Three-dimensional (3D) meso-scale finite element models of concrete based on in-situ X-ray Computed Tomography (XCT) images are developed and validated in this study. The micro-scale images from a Brazilian-like XCT test are first compressed and then transformed into manageable meso-scale 3D meshes using a voxel hexahedron meshing technique with a stacking algorithm. The continuum damage plasticity model is used to simulate complicated damage and fracture behaviour. Excellent qualitative agreement is found between modelling and the XCT compression test in terms of damage evolution and fracture process on both the surface and interior of the specimen. 3D uniaxial tension tests are also simulated, and it is found that the distribution of voids have profound influences on the strength and crack patterns. The image-based 3D models are proved very promising in elucidating fundamental mechanisms of complicated crack initiation and propagation behaviour that 2D studies are incapable of modelling.