A chemo-mechanically coupled continuum damage-healing model for chemical reaction-based self-healing materials

2021 ◽  
pp. 111346
Author(s):  
Xiaolong Zhang ◽  
Pingping Zhu ◽  
Zheng Zhong
Keyword(s):  
Chemical Reaction ◽  
Continuum Damage ◽  
Self Healing ◽  
Damage Healing ◽  
Healing Model

A continuum damage-healing model of healing agents based self-healing materials

2017 ◽  
Vol 27 (5) ◽  
pp. 754-778 ◽  
Author(s):  
Yihui Pan ◽  
Fang Tian ◽  
Zheng Zhong
Keyword(s):  
Field Method ◽  
Phase Field Method ◽  
Uniaxial Tensile ◽  
Continuum Damage ◽  
Self Healing ◽  
Pure Bending ◽  
Accumulated Damage ◽  
Uniaxial Tensile Stress ◽  
Damage Healing ◽  
Healing Model

In this paper, a continuum damage-healing model is proposed to interpret the damage-healing phenomenon of healing agents based self-healing materials. The plasticity, damage and healing are respectively described by accumulated plastic strain, damage variable and healing variable. Based on the non-equilibrium thermodynamics and the phase field method, the energy dissipation and corresponding kinetic laws of plasticity, damage and healing are respectively obtained. The healing is motivated by the diffusion of healing agents released by capsules or solute atoms. The corresponding process is described by a diffusion equation with chemical reaction. Furthermore, the threshold and the criteria of damage and healing are established for self-healing materials. The theoretical model is then applied to simulate the healing of concentrated and dispersed damage including the cutting damage, the puncture damage, the homogeneous damage under uniaxial tensile stress and the inhomogeneous damage under pure bending. It is demonstrated that the mechanical loading, the accumulated damage and the diffusion of healing agents work together to govern the healing evolution of self-healing materials.

Continuum damage-healing framework for the hydration induced self-healing of the cementitious composite

2020 ◽  
pp. 105678952096803
Author(s):  
Qing Chen ◽  
Xiangyong Liu ◽  
Hehua Zhu ◽  
J Woody Ju ◽  
Xie Yongjian ◽  
...  
Keyword(s):  
Healing Process ◽  
Healing Time ◽  
Continuum Damage ◽  
Self Healing ◽  
Hydration Products ◽  
Cementitious Composite ◽  
Hydration Kinetics ◽  
Micro Cracks ◽  
Damage Healing ◽  
Healing Model

The self-healing materials have become more and more popular due to their active capacity of repairing the (micro-) damages, such as the (micro-) cracks, the (micro-) voids and the other defects. In this paper, the thermodynamic based damage-healing framework is presented for the hydration induced self-healing composite with a compatible healing variable. The new variable is incorporated to consider the time-dependent properties of the hydration products, with which a new damage healing law is proposed. The hydration kinetics are employed to describe the healing process. The properties of the hydration products are arrived with the multiscale and multilevel homogenization scheme. The presented damage-healing model is applied to an isotropic cementitious composite under the tensile loading histories. The presented framework is compared with the classic continuum damage-healing theory and the experimental data. The results show that the presented damage-healing model is capable of describing the hydration induced self-healing of the cementitious composite. It can describe the behavior of the partially and fully healed concrete material. The effects of the healing time and the compatible healing variables on the damage-healing results are investigated based on our proposed framework.

A Semi-Analytic Solution for Self-Healing Concrete Beams Through Stress Spectral Decomposition

2018 ◽  
Vol 10 (07) ◽  
pp. 1850077
Author(s):  
A. Kazemi ◽  
M. Baghani ◽  
H. Shahsavari ◽  
S. Sohrabpour
Keyword(s):  
Cross Section ◽  
Spectral Decomposition ◽  
Damage Mechanics ◽  
Concrete Beam ◽  
Rectangular Cross Section ◽  
Closed Form Solution ◽  
The Self ◽  
Continuum Damage ◽  
Self Healing ◽  
Damage Healing

Continuum damage-healing mechanics (CDHM) is used for phenomenological modeling of self-healing materials. Self-healing materials have a structural capability to recover a part of the damage for increasing materials life. In this paper, a semi-analytic modeling for self-healing concrete beam is performed. Along this purpose, an elastic damage-healing model through spectral decomposition technique is utilized to investigate an anisotropic behavior of concrete in tension and compression. We drive an analytical closed-form solution of the self-healing concrete beam. The verification of the solution is shown by solving an example for a simply supported beam having uniformly distributed the load. Finally, a result of a self-healing concrete beam is compared to elastic one to demonstrate the capability of the proposed analytical method in simulating concrete beam behavior. The results show that for the specific geometry, the self-healing concrete beam tolerates 21% more weight, and the deflection of the entire beam up to failure load is about 27% larger than elastic solution under ultimate elastic load for both I-beam and rectangular cross-section. Comparison of Continuum Damage Mechanics (CDM) solution with CDHM solution of beam shows that critical effective damage is decreased by 32.4% for a rectangular cross-section and by 24.2% for I-shape beam made of self-healing concrete.

scholarly journals Continuum Damage-healing Mechanics with Application to Self-healing Composites

2005 ◽  
Vol 14 (1) ◽  
pp. 51-81 ◽  
Author(s):  
Ever J. Barbero ◽  
Fabrizio Greco ◽  
Paolo Lonetti
Keyword(s):  
Continuum Damage ◽  
Self Healing ◽  
Damage Healing

scholarly journals Continuum Damage-Healing and Super Healing Mechanics in Brittle Materials: A State-of-the-Art Review

2018 ◽  
Vol 8 (12) ◽  
pp. 2350 ◽  
Author(s):  
Chahmi Oucif ◽  
Luthfi Mauludin
Keyword(s):  
State Of The Art ◽  
Experimental Studies ◽  
Brittle Materials ◽  
Research Area ◽  
Continuum Damage ◽  
Self Healing ◽  
Future Perspectives ◽  
Review Of The Literature ◽  
Damage Healing ◽  
The Rich

Over the last several years, self-healing materials have become more and more popular in terms of damage reparation. Moreover, a recent theoretical investigation of super healing materials that aims at repairing and strengthening itself was also developed. This research area is well known by the rich experimental studies compared to the numerical investigations. This paper provides a review of the literature of continuum damage-healing and super healing mechanics of brittle materials based on continuum damage and healing mechanics. This review includes various damage-healing models, methodologies, hypotheses and advances in continuum damage and healing mechanics. The anisotropic formulations of damage and healing mechanics are also highlighted. The objective of this paper is also to review the super healing theory based on continuum damage-healing mechanics and its role in material and structure strengthening. Finally, a conclusion of the reviewed damage-healing models is pointed out and future perspectives are given.

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