scispace - formally typeset
Search or ask a question
Topic

Smart material

About: Smart material is a research topic. Over the lifetime, 3704 publications have been published within this topic receiving 74280 citations. The topic is also known as: intelligent material & responsive material.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, a novel cation sensitive smart biopolymer is utilized in a wise sequential polymer injection/gas production scenario that includes a protective gas flow, which efficiently restrains saline water in the lower permeability layer and protects the higher permeable layer from undesired damage.
Abstract: The challenge of excess water production from low permeability layer of a stratified gas reservoir is investigated in this study. Considering the fluid flow behavior in heterogeneous porous media, placing a blocking agent within the lower permeability layer and protecting the adjacent higher permeable layer from damage is practically impossible. To overcome such challenge, a novel cation sensitive smart biopolymer is utilized in a wise sequential polymer injection/gas production scenario that includes a protective gas flow. To evaluate the conceptual proposition, a series of flow tests have been conducted in a stratified micromodel. It is shown that the proposed treatment efficiently restrains saline water in the lower permeability layer and protects the higher permeable layer from undesired damage. The results indicate that being smart in water shutoff treatment is not only employing smart materials but engineering their application is the key for success.

21 citations

Journal ArticleDOI
TL;DR: In this article, a discrete extended unparallel Prandtl-Ishlinskii model based internal model (d-EUPI-IM) control approach is proposed to solve the periodic reference tracking problem.
Abstract: Micro/nano positioning technologies have been attractive for decades for their various applications in both industrial and scientific fields. The actuators employed in these technologies are typically smart material actuators, which possess inherent hysteresis that may cause systems behave unexpectedly. Periodic reference tracking capability is fundamental for apparatuses such as scanning probe microscope, which employs smart material actuators to generate periodic scanning motion. However, traditional controller such as PID method cannot guarantee accurate fast periodic scanning motion. To tackle this problem and to conduct practical implementation in digital devices, this paper proposes a novel control method named discrete extended unparallel Prandtl–Ishlinskii model based internal model (d-EUPI-IM) control approach. To tackle modeling uncertainties, the robust d-EUPI-IM control approach is investigated, and the associated sufficient stabilizing conditions are derived. The advantages of the proposed controller are: it is designed and represented in discrete form, thus practical for digital devices implementation; the extended unparallel Prandtl–Ishlinskii model can precisely represent forward/inverse complex hysteretic characteristics, thus can reduce modeling uncertainties and benefits controllers design; in addition, the internal model principle based control module can be utilized as a natural oscillator for tackling periodic references tracking problem. The proposed controller was verified through comparative experiments on a piezoelectric actuator platform, and convincing results have been achieved.

21 citations

Journal ArticleDOI
TL;DR: It is proved that the proposed structure can be regarded as a smart metamaterial with orthotropic properties, which has unique values of Poisson’s ratio, which can be either positive or negative, depending on the applied control parameters.
Abstract: In the present paper, a novel cellular metamaterial that was based on a tensegrity pattern is presented. The material is constructed from supercells, each of which consists of eight 4-strut simplex modules. The proposed metamaterial exhibits some unusual properties, which are typical for smart structures. It is possible to control its mechanical characteristics by adjusting the level of self-stress or by changing the properties of structural members. A continuum model is used to identify the qualitative properties of the considered metamaterial, and to estimate how the applied self-stress and the characteristics of cables and struts affect the whole structure. The performed analyses proved that the proposed structure can be regarded as a smart metamaterial with orthotropic properties. One of its most important features are unique values of Poisson’s ratio, which can be either positive or negative, depending on the applied control parameters. Moreover, all of the mechanical characteristics of the proposed metamaterial are prone to structural control.

21 citations

Journal ArticleDOI
TL;DR: In this paper , the most recent applications of 4D printing technology and smart materials in medical engineering which can show better prospective of 3D printing applications in the future are discussed. And the major challenges in this technology are explained along with some suggestions for future works to address existing limitations.
Abstract: Abstract The addition of the time dimension to three-dimensional (3D) printing has introduced four-dimensional (4D) printing technology, which has gained considerable attention in different fields such as medical, art, and engineering. Nowadays, bioscience has introduced some ideas which can be fulfilled by 4D printing. Blending time with variations caused by the situation has many beneficial aspects such as perceptibility and adaptability. Since 4D printing can create a dynamic structure with stimuli-responsive materials, the applications of smart materials, stimulus, and 3D printing are the effective criteria in 4D printing technology. Smart materials with their flexible properties can reshape, recolor, or change function under the effect of the internal or exterior stimuli. Thus, an attractive prospect in the medical field is the integration of the 4D printing approach along with smart materials. This research aims to show the most recent applications of 4D printing technology and smart materials in medical engineering which can show better prospective of 4D printing applications in the future. Also, it describes smart medical implants, tissue engineering, and bioprinting and how they are being used for the 4D printing approach in medical engineering applications. In this regard, a particular emphasis is dedicated to the latest progress in the innovation and development of stimuli-responsive materials that are activated and respond over time to physical, chemical, and biological stimuli and their exploitation through 3D printing methods to fabrication 4D printing smart parts such as intelligent tissue-engineered scaffolds, smart orthopedic implants, and targeted drug delivery systems. On the other hand, major challenges in this technology are explained along with some suggestions for future works to address existing limitations. It is worth noting that despite significant research that has been carried out into 4D printing, it might be more valuable if some investigation is done into 4D bio-printing applications and how this approach will be developed.

21 citations

Journal ArticleDOI
TL;DR: In this article, a manganite perovskite with super-stoichiometric manganese has been synthesized, which consists of soft spherical-like ferromagnetic nanoparticles with an average size of 65 nm and with a narrow temperature range of the magnetic phase transition at 42 °C.
Abstract: For many medical applications related to diagnosis and treatment of cancer disease, hyperthermia plays an increasingly important role as a local heating method, where precise control of temperature and parameters of the working material is strongly required. Obtaining a smart material with “self-controlled” heating in a desirable temperature range is a relevant task. For this purpose, the nanopowder of manganite perovskite with super-stoichiometric manganese has been synthesized, which consists of soft spherical-like ferromagnetic nanoparticles with an average size of 65 nm and with a narrow temperature range of the magnetic phase transition at 42 °C. Based on the analysis of experimental magnetic data, a specific loss power has been calculated for both quasi-stable and relaxation hysteresis regions. It has been shown that the local heating of the cell structures to 42 °C may occur for a short time (∼1.5 min.) Upon reaching 42 °C, the heating is stopped due to transition of the nanopowder to the paramagnetic state. The obtained results demonstrate the possibility of using synthesized nanopowder as a smart magnetic nanomaterial for local hyperthermia with automatic heating stabilization in the safe range of hyperthermia without the risk of mechanical damage to cell structures.

20 citations


Network Information
Related Topics (5)
Carbon nanotube
109K papers, 3.6M citations
86% related
Nanoparticle
85.9K papers, 2.6M citations
83% related
Graphene
144.5K papers, 4.9M citations
83% related
Polymer
131.4K papers, 2.6M citations
83% related
Thin film
275.5K papers, 4.5M citations
80% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023168
2022315
2021268
2020250
2019252
2018239