Zero-thickness interface constitutive theory for concrete self-healing effects

Abstract

A damage-plasticity constitutive theory for zero-thickness interfaces is presented aimed at predicting time-dependent self-healing phenomena in concrete. The material model is based on fracture-energy concepts and accounts for the time evolution of concrete porosity induced by the self-healing mechanism. The accuracy and soundness of the proposed interface model are demonstrated through comparative analyses of model predictions against experimental results on three point beam tests performed up to crack opening and then, up to complete failure, before and after been subjected to different exposure conditions, respectively. A wide range of experimental tests was considered in this work for both calibration and validation purposes of the proposed interface model.

A unified multiscale modelling approach for concrete fatigue with microscale damage‐mechanism implementations

“…A cracking surface defines the (effective) stress level at which the post-elastic displacements starts [14] f =σ 2 A cracking surface defines the (effective) stress level at which the post-elastic displacements starts [14] f =σ 2…”

“…The possibilities of modelling the fracture response, induced by LCF, can be approached through employing zero-thickness interface elements for discrete crack analysis. A cracking surface defines the (effective) stress level at which the post-elastic displacements starts [14] f…”

Research Progress on Numerical Models for Self‐Healing Cementitious Materials

“…Caggiano et al developed an interface model for simulating autogenous and enhanced self‐healing in cementitious materials. Their model adopted an elasto‐plastic–damage model framework with healing being introduced via the parameters that govern the evolution of the plastic–damage function.…”

A review study on encapsulation‐based self‐healing for cementitious materials

“…Compared with experimental methods, numerical simulation seems more convenient and low‐cost, although the accuracy is sacrificed through idealizing the real self‐healing behavior and the complex properties of cementitious materials . Nevertheless, numerical analysis is a valuable technique to investigate self‐healing mechanics with parametric analysis, if there are improvements in assumptions of the nonuniform and multiaxial load conditions and consideration of the inconsistency between the capsules and cement matrix . Associating with self‐healing process, the simulation researches mainly involve initiation of self‐healing action, flow of healing agent and required quantity of capsules and healing agent.…”