Thermodynamic based model for coupled elastoplastic damage-healing behaviour of unsaturated geomaterials

Esgandani, Golnaz Alipour; El‐Zein, Abbas

doi:10.1016/j.mechmat.2020.103395

Cited by 10 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The model employs an exponential healing function that evolves with time and is directly associated with the damage variable. Esgandi et al [110] presented a CDHM model tailored for unsaturated materials. This model was crafted by integrating the complementary energy equivalence hypothesis within a damage-healing framework.…”

Section: Continuum Damage-healing Mechanicsmentioning

confidence: 99%

Recent Advances of Self-Healing Materials for Civil Engineering: Models and Simulations

Liao,

Zhang,

et al. 2024

Buildings

View full text Add to dashboard Cite

Empowering materials with self-healing capabilities is an attractive approach for sustainable development. This strategy involves using different methods to automatically heal microcracks and damages that occur during the service life of materials or structures. Initially, this study begins with an in-depth exploration of self-healing characteristics found in materials such as concrete, asphalt, and polymers. The differences and comparative merits and demerits between autogenous (intrinsic) healing and autonomic (extrinsic) healing are discussed, and it is found that intrinsic healing is more promising. Subsequently, the study explores how models are applied to assess self-healing efficiency. The results indicate that time and temperature have significant impacts on the self-healing process. However, there is a scarcity of research exploring the effects of load factors during service life. Computational simulation methodologies for microcapsules and asphalt within self-healing materials are investigated. Multiscale characterization and machine learning can further elucidate the healing mechanisms and facilitate the establishment of computational models. This study endeavors to realize the maximum capabilities of self-healing materials, paving the way for the design of sustainable and more effective self-repairing materials for various applications.

show abstract

Section: Continuum Damage-healing Mechanicsmentioning

confidence: 99%

Recent Advances of Self-Healing Materials for Civil Engineering: Models and Simulations

Liao,

Zhang,

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…When the suction remains constant, the degree of saturation will decrease with the increase of void ratio, and when the degree of saturation is constant, the suction will increase with the increase of void ratio. Equation (24) can also be reduced to the vG model without considering the change of void ratio.…”

Section: Soil-water Characteristicmentioning

confidence: 99%

“…However, most of the constitutive equations used in these models are empirical equations obtained by fitting the experimental results [20], which lack a strict theoretical basis. With the help of thermodynamic theory, some authors established the corresponding hyper-plasticity constitutive models by defining the free energy function and the dissipative potential function to overcome the theoretical defects of the classical elastic-plastic model [21][22][23][24]. Although these models still follow the theoretical framework of the classical elastoplastic model, they provide a clear physical meaning for the concepts of yield criteria and flow rules.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Hydro-Mechanical Coupling Behavior of Unsaturated Geotechnical Materials Based on Non-Equilibrium Thermodynamic Theory

2020

View full text Add to dashboard Cite

A new hydro-mechanical model for unsaturated geotechnical materials based on the non-equilibrium thermodynamic theory is presented in this paper. Common concepts, such as yield criterion and flow rules, are not involved in the constitutive relationships, and are replaced with the thermodynamic concepts of granular temperature, granular entropy, migration coefficients, and energy functions. The dissipation system and the migration coefficient relationships are theoretically determined, and the constitutive relations of non-elastic deformation and granular temperature are obtained by dissipation relations and thermodynamic identity. Thus, the relationship between dissipation mechanism and macro mechanical behavior can be established by migration coefficients and energy functions. The model can reflect the complex hydro-mechanical coupling behavior of unsaturated geotechnical materials subjected to various mechanical paths. The validity of the model is verified by comparing the modeling results with experimental data, and reasonable agreement is achieved.

show abstract

“…Alongside this, significant progress has been made on the development of numerical models for simulating the self-healing behaviour (Jefferson et al, 2018). Many of the models developed have focussed on mechanical damage-healing behaviour (Voyiadjis, Shojaei and Li, 2011;Zhang and Zhuang, 2018;Esgandani and El-Zein, 2020), though there have been a number that considered the associated transport processes (Aliko-Benítez, Doblaré and Sanz-Herrera, 2015;Chitez and Jefferson, 2016;Gilabert et al, 2017). In addition to this, there is an ever increasing number of models being developed that consider the coupled physical processes governing the self-healing response (Hilloulin et al, 2016;Di Luzio, Ferrara and Krelani, 2018;Rodríguez et al, 2019;Cibelli et al, 2022;Jefferson and Freeman, 2022).…”

Section: Introductionmentioning

confidence: 99%

A 3D Coupled Finite-Element Model for Simulating Mechanical Regain in Self-Healing Cementitious Materials

Freeman

Jefferson

2023

J. Eng. Mech.

View full text Add to dashboard Cite

This study presents a new 3D coupled model for simulating self-healing cementitious materials. The mechanical behaviour is described using a damage-healing cohesive zone model that is implemented using a new embedded strong discontinuity hexahedral element. The transport component of the model considers the flow of healing agent through discrete cracks, governed by the mass balance equation with Darcy's law being employed for the healing agent flux. The dependency of the mechanical response on the healing agent transport is accounted for through a local crack filling function that represents the amount of healing agent available to undergo healing. The healing itself is described by a generalised healing front model that simulates the accumulation of healed material within the crack, emanating from the crack faces. The performance of the model is demonstrated through the consideration of a healing front study and experimental tests on self-healing cementitious specimens. The examples consider a vascular self-healing cementitious specimen that uses a sodium silicate solution as the healing agent and the autogenous healing of a cementitious specimen with and without crystalline admixtures. The results of the validations show that the model is able to reproduce the experimentally observed behaviour with good accuracy.

show abstract

Thermodynamic based model for coupled elastoplastic damage-healing behaviour of unsaturated geomaterials

Cited by 10 publications

References 38 publications

Recent Advances of Self-Healing Materials for Civil Engineering: Models and Simulations

Recent Advances of Self-Healing Materials for Civil Engineering: Models and Simulations

Modeling the Hydro-Mechanical Coupling Behavior of Unsaturated Geotechnical Materials Based on Non-Equilibrium Thermodynamic Theory

A 3D Coupled Finite-Element Model for Simulating Mechanical Regain in Self-Healing Cementitious Materials

Contact Info

Product

Resources

About