Modeling Framework for Fracture in Multiscale Cement-Based Material Structures

Abstract

Multiscale modeling for cement-based materials, such as concrete, is a relatively young subject, but there are already a number of different approaches to study different aspects of these classical materials. In this paper, the parameter-passing multiscale modeling scheme is established and applied to address the multiscale modeling problem for the integrated system of cement paste, mortar, and concrete. The block-by-block technique is employed to solve the length scale overlap challenge between the mortar level (0.1–10 mm) and the concrete level (1–40 mm). The microstructures of cement paste are simulated by the HYMOSTRUC3D model, and the material structures of mortar and concrete are simulated by the Anm material model. Afterwards the 3D lattice fracture model is used to evaluate their mechanical performance by simulating a uniaxial tensile test. The simulated output properties at a lower scale are passed to the next higher scale to serve as input local properties. A three-level multiscale lattice fracture analysis is demonstrated, including cement paste at the micrometer scale, mortar at the millimeter scale, and concrete at centimeter scale.

Effect of printing parameters on interlayer bond strength of 3D printed limestone-calcined clay-based cementitious materials: An experimental and numerical study

“…Earlier studies [40][41][42][43] employed the discrete lattice fracture model to predict and model the fracture process of the digital specimen in a mechanical test, e.g., compression, flexural, splitting, and uniaxial tensile strength. The digital specimen, mimicking the cementitious material (the input of material mesostructure), can be constructed by using different techniques, e.g., X-ray computed tomography [42][43][44], nanoindentation [45], and others [46,47].…”

A New Model for Optimal Mechanical and Thermal Performance of Cement-Based Partition Wall

“…A popular fabrication process that is used for the partition wall is compression moulding. Even though the cement-based materials exhibit multiscale porosity behaviour [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ] (as seen in Figure 1 ), by using the homogenization method [ 32 , 33 , 34 ], it can be modelled as continuum materials by choosing the proper material parameters. The strength of the partition wall is usually between 10–15 MPa, which is similar to Chinese C10–C15 concrete.…”

An Orthotropic Elastic-Plastic Constitutive Model for Masonry Walls

“…Especially in combination with the monitoring based on operational modal analysis (OMA) techniques, it is becoming a popular practice [48]. An alternative may also be the relatively young topic of multi-scale modeling [49] or to describe diffuse cracks a gradient-enhanced damage model based on nonlocal displacements and the extended finite element method (XFEM) for sharp cracks [50,51]. However, if we compare the numerical result presented here with the failure mechanisms shown in Figures 16 and 20, we find a good agreement and confirm the ability of our own model to correctly reflect the behavior of the structure.…”