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.

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.

Self-healing and shape memory metallopolymers: state-of-the-art and future perspectives

2020 ◽  
Vol 49 (10) ◽  
pp. 3042-3087 ◽  
Author(s):  
Gulzhian I. Dzhardimalieva ◽  
Bal C. Yadav ◽  
Shakti Singh ◽  
Igor E. Uflyand
Keyword(s):  
Shape Memory ◽  
State Of The Art ◽  
Self Healing ◽  
Future Perspectives ◽  
Shape Memory Materials

Recent achievements and problems associated with the use of metallopolymers as self-healing and shape memory materials are presented and evaluated.

Pasireotide in the treatment of neuroendocrine tumors: a review of the literature

2018 ◽  
Vol 25 (6) ◽  
pp. R351-R364 ◽  
Author(s):  
Giovanni Vitale ◽  
Alessandra Dicitore ◽  
Concetta Sciammarella ◽  
Sergio Di Molfetta ◽  
Manila Rubino ◽  
...  
Keyword(s):  
Neuroendocrine Tumors ◽  
Clinical Relevance ◽  
State Of The Art ◽  
Somatostatin Receptor ◽  
Somatostatin Analogs ◽  
Future Perspectives ◽  
Review Of The Literature ◽  
Antiproliferative Effects ◽  
High Affinity ◽  
Well Differentiated

Somatostatin analogs have an important role in the medical therapy of neuroendocrine tumors (NETs). Octreotide and lanreotide, both somatostatin analogs binding with high affinity for the somatostatin receptor (SSTR)2, can control symptoms in functional NETs. In addition, these compounds, because of their antiproliferative effects, can stabilize growth of well-differentiated NETs. Pasireotide is a novel multireceptor-targeted somatostatin analog with high affinity for SSTR1, 2, 3, and 5. This review provides an overview of the state of the art of pasireotide in the treatment of NETs, with the aim of addressing clinical relevance and future perspectives for this molecule in the management of NETs.

Nonlaminar Behavior in Bearings: A Critical Review of the Literature

1974 ◽  
Vol 96 (1) ◽  
pp. 174-181 ◽  
Author(s):  
E. A. Saibel ◽  
N. A. Macken
Keyword(s):  
Flow Field ◽  
Critical Review ◽  
State Of The Art ◽  
Experimental Studies ◽  
The State ◽  
Basic Flow ◽  
Review Of The Literature ◽  
Design Data

The state-of-the-art of nonlaminar behavior in bearings is presented. Analytical and experimental studies are discussed. It is pointed out that the basic flow field is still not clearly understood, and that there is much more information needed before design data can be accurately predicted.

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 Artificial Intelligence in Dermatopathology: New Insights and Perspectives

2021 ◽  
Vol 8 (3) ◽  
pp. 418-425
Author(s):  
Gerardo Cazzato ◽  
Anna Colagrande ◽  
Antonietta Cimmino ◽  
Francesca Arezzo ◽  
Vera Loizzi ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Machine Learning ◽  
Differential Diagnosis ◽  
State Of The Art ◽  
The State ◽  
Embryonic Stage ◽  
Future Perspectives ◽  
Review Of The Literature ◽  
Melanocytic Lesions ◽  
Modern Era

In recent years, an increasing enthusiasm has been observed towards artificial intelligence and machine learning, involving different areas of medicine. Among these, although still in the embryonic stage, the dermatopathological field has also been partially involved, with the attempt to develop and train algorithms that could assist the pathologist in the differential diagnosis of complex melanocytic lesions. In this article, we face this new challenge of the modern era, carry out a review of the literature regarding the state of the art and try to determine promising future perspectives.

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.

Investigation of the super healing theory in continuum damage and healing mechanics

2018 ◽  
Vol 28 (6) ◽  
pp. 896-917 ◽  
Author(s):  
Chahmi Oucif ◽  
George Z Voyiadjis ◽  
Peter I Kattan ◽  
Timon Rabczuk
Keyword(s):  
Plane Stress ◽  
Elastic Energy ◽  
Elastic Strain ◽  
Elastic Stiffness ◽  
Continuum Damage ◽  
Self Healing ◽  
Energy Equivalence ◽  
Stiffness Variation ◽  
Damage Healing ◽  
Definition Of

Self-healing is the capability of a material to heal (repair) damages autogenously and autonomously. New theoretical investigation extended from the healing material which represents a strengthening material was recently proposed. It concerns the theory of super healing. The healing in this case continues beyond what is necessary to recover the original stiffness of the material, and the material becomes able to strengthen itself. In the present work, the definition of the super healing theory is extended and defined based on the elastic stiffness variation. It concerns the degradation, recovery, and strengthening of the elastic stiffness in the case of damage, healing, and super healing materials, respectively. Comparison of the healing and super healing efficiencies between the hypotheses of the elastic strain and elastic energy equivalence is carried out. The classical super healing definition is also extended to generalized nonlinear and quadratic super healing based on elastic stiffness strengthening, and comparison of the super healing behavior in each theory is performed. It is found that the hypothesis of the elastic energy equivalence overestimates both the generalized nonlinear and quadratic super healed elastic stiffness strengthening. In addition, the generalized nonlinear super healing theory gives a high strengthening of the super healed elastic stiffness compared to the quadratic super healing theory in both equivalence hypotheses. It is also demonstrated that both the generalized nonlinear and quadratic super healing theories can be applied in the case of plane stress.

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