Self-healing Concrete Multi-scale Computational Mechanics Models Research

This paper presents a multiscale computer modeling and computational mechanics implementation process of Self-Healing Concrete (SHC). Chapter 1 narrows the sources of these topics, current researches, trends and problems and thinking technical route. Chapter 2 studies the conventional model of multi-scale concrete, the definition of the self-healing concrete study multi-scale problems, combined with semi-brittle materials multiscale model of the new development, analysis of the first generation of self-healing concrete more scales models. The new model can reflect the new capsule cure and heal intermediary parameter characteristics, able to adapt to the new self-healing concrete design needs, from Nano, Micro, Meso to Macro as the progressive realization of large effective transferring; finally, with limited self-healing concrete element method and simulation before and after damage to achieve structural design. Chapter 3 discusses self-healing and concrete at Nano-scale uncertainty of the problem. Chapter 4 describes the uncertainty and self-healing concrete at the Micro-scale. It describes the method of multiple scales from small scale to large scale bottom-up. Chapter 5 is based on research Nano-scale and micro-scale, and this chapter presents case studies contact surface characteristics, analyzing the nanotubes and polymer molecular dynamics model. Chapter 6 presents self-healing and concrete Meso-scale optimization problem refers primarily through effective gradient optimization method, the continuity of the capsule unit structure, to solve the distribution problems and cell capsules partition researches. Chapter 7 of the fracture simulation Macro-scale is outlined. Chapter 8 sums up the situation of above 7 chapters. Meanwhile, a road surface concrete idea introducing self-healing, self-healing capsules in strength, stiffness and barrier properties and other aspects of the research introduction outlook are proposed.This article relates to various methods in model design and multi-scale studies. Nano-scale study involves molecular dynamics method, equivalent joint radical method, Latin Hypercube Sampling Method. Micro-scale studies related to sensitivity analysis, atomic model into structural mechanics model methods; there are also independent of input parameters, parallel parameter model, the model parameters, separate regression parameters variance, conditional distribution sampling, spreading matrix merger, pointer-based extended regression, correlation unit input extension Sobol methodologies and relevant input parameters of the model-based approach sensitive pointer analysis. Involving non-uniform rational B-spline (NURBS) basis functions in the study to define the concept of continuous and smooth mesh fiber distribution function independently, increase the mesh size, greatly reduce the computation time. Macro studies of self-healing deformation equations and cyclic loading concrete plasticity control model selection has been described on the macroscopic constitutive model for concrete member elaborate, especially for the introduction of self-healing concrete macro elements were analyzed using the constitutive models.The results of this study to develop a new generation of self-healing concrete has a positive effect, reducing computation cost and precision controllable structure can be made on self-healing concrete design proposals.