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学者姓名:王铁军

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Magnetic double-network hydrogels for tissue hyperthermia and drug release SCIE
期刊论文 | 2019 , 7 (8) , 1311-1321 | JOURNAL OF MATERIALS CHEMISTRY B
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Abstract :

Magnetic-field driven soft materials have found extensive applications in fields such as soft robotics, shape morphing and biomedicine. Compared to magnetoactive elastomers (MAEs), magnetic hydrogels have shown significant advantages for in vivo applications, because of their better biocompatibility, as well as their soft and wet nature. However, the poor mechanical properties and ion sensitivity of conventional magnetic hydrogels will severely limit their applications especially under physiological conditions. Double network hydrogels are tough and stable, but do not respond to environmental stimuli. Here magnetic double network (M-DN) hydrogels have been developed with outstanding mechanical performances and ion-resistant stability. M-DN hydrogels show a high modulus of similar to 0.4 MPa and a high toughness of similar to 1500 J m(-2). The volume, magnetic and mechanical properties of M-DN hydrogels show negligible deterioration in ionic solutions. M-DN hydrogels exhibit magnetic responsiveness and have been used for tissue hyperthermia and drug release by magnetic induction heating. The induction heating behavior of M-DN hydrogels can be tuned to meet the clinical requirements, by changing the magnetic field strength or the composition of magnetic hydrogels. M-DN hydrogels may be inspiring to the development of responsive DN hydrogels and expand their more potential applications in load-bearing biomedical engineering.

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GB/T 7714 Tang, Jingda , Qiao, Yancheng , Chu, Yanhui et al. Magnetic double-network hydrogels for tissue hyperthermia and drug release [J]. | JOURNAL OF MATERIALS CHEMISTRY B , 2019 , 7 (8) : 1311-1321 .
MLA Tang, Jingda et al. "Magnetic double-network hydrogels for tissue hyperthermia and drug release" . | JOURNAL OF MATERIALS CHEMISTRY B 7 . 8 (2019) : 1311-1321 .
APA Tang, Jingda , Qiao, Yancheng , Chu, Yanhui , Tong, Zongfei , Zhou, Yifan , Zhang, Wenlei et al. Magnetic double-network hydrogels for tissue hyperthermia and drug release . | JOURNAL OF MATERIALS CHEMISTRY B , 2019 , 7 (8) , 1311-1321 .
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Advances in oxidation and ablation resistance of high and ultra-high temperature ceramics modified or coated carbon/carbon composites EI SCIE
期刊论文 | 2018 , 38 (1) , 1-28 | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
WoS CC Cited Count: 21
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Abstract :

Carbon/carbon (C/C) composites are considered as one of the most promising materials in structural applications owing to their excellent mechanical properties at high temperature. However, C/C composites are susceptible to high-temperature oxidation. Matrix modification and coating technology with ultra-high temperature ceramics (UHTCs) have proved to be highly effective to improve the oxidation and ablation resistance of C/C composites. In this paper, recent advances in oxidation and ablation resistance of C/C composites were firstly reviewed, with attention to oxidation and ablation properties of C/C composites coated or modified with UHTCs. Then, several new methods in improving oxidation and ablation resistance were discussed, such as by using nanostructures to toughen UHTCs coatings or carbon matrix and the combination of matrix modification and coating technology. In addition, relevant ablation tests with scaled models were also briefly introduced. Finally, some open problems and future challenges were highlighted in the development and application of these materials.

Keyword :

Ablation Carbon/carbon composite Coating Matrix modification Oxidation

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GB/T 7714 Jin, Xiaochao , Fan, Xueling , Lu, Chunsheng et al. Advances in oxidation and ablation resistance of high and ultra-high temperature ceramics modified or coated carbon/carbon composites [J]. | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY , 2018 , 38 (1) : 1-28 .
MLA Jin, Xiaochao et al. "Advances in oxidation and ablation resistance of high and ultra-high temperature ceramics modified or coated carbon/carbon composites" . | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 38 . 1 (2018) : 1-28 .
APA Jin, Xiaochao , Fan, Xueling , Lu, Chunsheng , Wang, Tiejun . Advances in oxidation and ablation resistance of high and ultra-high temperature ceramics modified or coated carbon/carbon composites . | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY , 2018 , 38 (1) , 1-28 .
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Dynamic response of square sandwich plates with a metal foam core subjected to low-velocity impact EI SCIE Scopus
期刊论文 | 2018 , 111 , 222-235 | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
WoS CC Cited Count: 5 SCOPUS Cited Count: 6
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Abstract :

An analytical model is developed to predict the dynamic response of fully clamped square sandwich plate with metal foam core struck transversely by a heavy mass with low-velocity. Large deflection effect is incorporated in analysis by considering the interaction between the plastic bending and stretching. The analytical expressions are obtained for the structural deflection, the structural response time and the impact force. The finite element results validate the accuracy of the analytical model and good agreement is achieved.

Keyword :

Dynamic plasticity Large deflection Low-velocity impact Metal foam core Sandwich plate

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GB/T 7714 Qin Qinghua , Zheng Xiaoyu , Zhang Jianxun et al. Dynamic response of square sandwich plates with a metal foam core subjected to low-velocity impact [J]. | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2018 , 111 : 222-235 .
MLA Qin Qinghua et al. "Dynamic response of square sandwich plates with a metal foam core subjected to low-velocity impact" . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 111 (2018) : 222-235 .
APA Qin Qinghua , Zheng Xiaoyu , Zhang Jianxun , Yuan Chao , Wang, T. J. . Dynamic response of square sandwich plates with a metal foam core subjected to low-velocity impact . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2018 , 111 , 222-235 .
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A semi-analytical model for predicting stress evolution in multilayer coating systems during thermal cycling EI SCIE Scopus
期刊论文 | 2018 , 135 , 31-42 | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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Abstract :

A semi-analytical model is developed to predict the stress evolution within a multilayer coating system during cyclic thermal loading. This model takes into account the temperature gradient across the thickness of the system, which is the common thermal conditions of the high-temperature protective coatings. The creep deformation and the oxide scale growth processes at the elevated temperature are considered in the theoretical framework. The cases of thermal barrier coatings are analyzed, and finite element analysis is performed for comparisons. The results show that the stress and creep strain fields solved by the semi-analytical method are consistent with the finite element predictions, which confirms the validity of the proposed model. The effects of creep in the system on the stresses and curvature evolutions are discussed. It is found that the large creep rates in the coatings or substrate could facilitate the stress relaxation processes in both of them, whereas the stress evolutions in the oxide scale are virtually unaffected. The curvature of the system may reverse from the concave to convex shape during the thermal cycling when the fast creep relaxations occur in the coatings. Furthermore, the creep deformations in the oxide scale provide benefits in relaxing the huge growth stresses so that the better durability of the system could be obtained. (C) 2017 Elsevier Ltd. All rights reserved.

Keyword :

Creep relaxation Thermal cycling Oxidation Multilayer coating system Stress evolution

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GB/T 7714 Li, Biao , Fan, Xueling , Zhou, Kun et al. A semi-analytical model for predicting stress evolution in multilayer coating systems during thermal cycling [J]. | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES , 2018 , 135 : 31-42 .
MLA Li, Biao et al. "A semi-analytical model for predicting stress evolution in multilayer coating systems during thermal cycling" . | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES 135 (2018) : 31-42 .
APA Li, Biao , Fan, Xueling , Zhou, Kun , Wang, Tiejun . A semi-analytical model for predicting stress evolution in multilayer coating systems during thermal cycling . | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES , 2018 , 135 , 31-42 .
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Mechanisms governing the failure modes of dense vertically cracked thermal barrier coatings EI SCIE Scopus
期刊论文 | 2018 , 189 , 451-480 | ENGINEERING FRACTURE MECHANICS
WoS CC Cited Count: 3 SCOPUS Cited Count: 5
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Abstract :

The introduction of dense vertical cracks in ceramic top coat has been recognized as an efficient way to improve the strain tolerance and service durability of thermal barrier coatings (TBCs). However, further growth of these pre-existing cracks may cause the delamination of the coatings to form various failure modes. The motivation of this work is to numerically study the mechanisms that govern the formation of failure modes in dense vertically cracked TBCs. The effects of vertical crack density and material properties on the fracture behaviors are discussed. An energy-based criterion is employed to deal with the surface crack deflection/penetration behavior at a bimaterial interface, and an interaction integral method for discontinuous materials is utilized to evaluate the fracture parameters. The failure maps of TBCs are constructed by examining the continuous variations of crack tip driving forces over the whole fracture process. It is verified that the interfacial fracture resistance could be enhanced by introducing high-density vertical cracks. At the same time, these cracks tend to penetrate into the bond coat that results in debonding at bond coat/substrate interface or at both interfaces. In addition to benefit in alleviating the interfacial mismatch stress, it is found that the high-density vertical cracks give toughening increases to the coating system by releasing more energy from multiple paths. Moreover, the effects of mixed-mode interface toughness and initially residual stress on the formations of failure mode are discussed. (C) 2017 Elsevier Ltd. All rights reserved.

Keyword :

Delamination Finite element analysis J-integral Surface crack Thermal barrier coatings

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GB/T 7714 Li, Biao , Fan, Xueling , Okada, Hiroshi et al. Mechanisms governing the failure modes of dense vertically cracked thermal barrier coatings [J]. | ENGINEERING FRACTURE MECHANICS , 2018 , 189 : 451-480 .
MLA Li, Biao et al. "Mechanisms governing the failure modes of dense vertically cracked thermal barrier coatings" . | ENGINEERING FRACTURE MECHANICS 189 (2018) : 451-480 .
APA Li, Biao , Fan, Xueling , Okada, Hiroshi , Wang, Tiejun . Mechanisms governing the failure modes of dense vertically cracked thermal barrier coatings . | ENGINEERING FRACTURE MECHANICS , 2018 , 189 , 451-480 .
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Towards enhanced sintering resistance: Air-plasma-sprayed thermal barrier coating system with porosity gradient EI SCIE Scopus
期刊论文 | 2018 , 38 (4) , 1946-1956 | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
WoS CC Cited Count: 2 SCOPUS Cited Count: 3
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Abstract :

Sintering is one of the major failure mechanisms of air-plasma-sprayed thermal barrier coating system (APS TBCs) during high temperature service. For better sintering resistance, the TBCs with compositional gradient has been developed and fabricated by using advanced feedstocks, e.g. rare earth element-doped and nanostructured powders. Herein, a structurally graded design is put forward to counteract the effect of sintering in a convenient and economic way. Sintering induced degradations, in terms of Young's modulus and thermal conductivity, are slower in graded porous TBCs, indicated by thermo-mechanical finite element analyses and verified by experiments. Furthermore, a new sintering resistance parameter is proposed to evaluate the sintering resistance of TBCs under experimental (isothermal) and service (thermally graded) conditions. It is shown that graded porous TBCs, with decreasing porosity from top to bottom, exhibits improved sintering resistance and overall performance for engineering application.

Keyword :

Evaluation parameter Porosity gradient Sintering resistance Thermal barrier coating Thermo-mechanical analysis

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GB/T 7714 Lv, Bowen , Fan, Xueling , Li, Dingjun et al. Towards enhanced sintering resistance: Air-plasma-sprayed thermal barrier coating system with porosity gradient [J]. | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY , 2018 , 38 (4) : 1946-1956 .
MLA Lv, Bowen et al. "Towards enhanced sintering resistance: Air-plasma-sprayed thermal barrier coating system with porosity gradient" . | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 38 . 4 (2018) : 1946-1956 .
APA Lv, Bowen , Fan, Xueling , Li, Dingjun , Wang, T. J. . Towards enhanced sintering resistance: Air-plasma-sprayed thermal barrier coating system with porosity gradient . | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY , 2018 , 38 (4) , 1946-1956 .
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A micro-structure based constitutive model for anisotropic stress-strain behaviors of artery tissues EI SCIE Scopus
期刊论文 | 2018 , 139 , 55-64 | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
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Abstract :

Many kinds of soft composite materials such as biological tissues exhibit strong anisotropic features. In particular, hyperelastic stress-strain behaviors of artery tissues have been long studied, since they play an important role in the cardio-vasculature. While many constitutive models were proposed, they usually failed to capture the anisotropic stress-strain behaviors under different ratios for biaxial loading. In this paper an anisotropic constitutive model for soft composite materials is presented, driven by the underlying microstructure of the fibers. A new structure-based tensor is presented to map the macroscopic deformation to the fiber stretch. One additional parameter is introduced to tune the coupling of stretch in two directions in order to capture the relatively weak anisotropic coupling. The multiaxial tensile tests with a range of anisotropic loading ratios, which was intended to capture the full spectrum of anisotropic loadings, were conducted on animal artery tissues. Model parameters were determined either directly from histological measurements or calibrated by analyzing the physical nature. Very good agreement between model and experimental results were obtained. To our best knowledge, it is the first demonstration to show the remarkable fitting results for the loading ratios that cover the full spectrum of anisotropy. (C) 2018 Elsevier Ltd. All rights reserved.

Keyword :

Anisotropic Artery tissues Constitutive model Soft materials

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GB/T 7714 Lu, Tongqing , Chen, Zhiqiang , Qi, H. Jerry et al. A micro-structure based constitutive model for anisotropic stress-strain behaviors of artery tissues [J]. | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES , 2018 , 139 : 55-64 .
MLA Lu, Tongqing et al. "A micro-structure based constitutive model for anisotropic stress-strain behaviors of artery tissues" . | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 139 (2018) : 55-64 .
APA Lu, Tongqing , Chen, Zhiqiang , Qi, H. Jerry , Wang, T. J. . A micro-structure based constitutive model for anisotropic stress-strain behaviors of artery tissues . | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES , 2018 , 139 , 55-64 .
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Super tough magnetic hydrogels for remotely triggered shape morphing EI SCIE Scopus
期刊论文 | 2018 , 6 (18) , 2713-2722 | JOURNAL OF MATERIALS CHEMISTRY B
SCOPUS Cited Count: 1
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Abstract :

Despite their potential in various fields such as soft robots, drug delivery and biomedical engineering, magnetic hydrogels have always been limited by their poor mechanical properties. Here a universal soaking strategy has been presented to synthesize tough magnetic nanocomposite (NC) hydrogels. We can simultaneously solve two common issues for magnetic hydrogels: the poor mechanical properties and poor distribution of magnetic particles. The toughness of the magnetic NC hydrogel achieves approximately 11 000 J m(-2). The outstanding properties of tough magnetic hydrogels will enable myriad applications. Here we demonstrate a new application for remotely triggered shape morphing. Heterogeneous structures based on magnetic hydrogels are shown to evolve into bio-inspired three-dimensional (3D) shapes (lotus flowers) from 2D-structured sheets. The self-folding of the structure is controlled by the magnetothermal effect in an alternating magnetic field. The capability to control the shape morphing of a multi-material system by a magnetic field may emerge as a new general strategy for programming complex soft structures.

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GB/T 7714 Tang, Jingda , Tong, Zongfei , Xia, Yukun et al. Super tough magnetic hydrogels for remotely triggered shape morphing [J]. | JOURNAL OF MATERIALS CHEMISTRY B , 2018 , 6 (18) : 2713-2722 .
MLA Tang, Jingda et al. "Super tough magnetic hydrogels for remotely triggered shape morphing" . | JOURNAL OF MATERIALS CHEMISTRY B 6 . 18 (2018) : 2713-2722 .
APA Tang, Jingda , Tong, Zongfei , Xia, Yukun , Liu, Ming , Lv, Zengyao , Gao, Yang et al. Super tough magnetic hydrogels for remotely triggered shape morphing . | JOURNAL OF MATERIALS CHEMISTRY B , 2018 , 6 (18) , 2713-2722 .
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Phase-separation induced extraordinary toughening of magnetic hydrogels EI SCIE Scopus
期刊论文 | 2018 , 123 (18) | JOURNAL OF APPLIED PHYSICS
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Phase separation markedly influences the physical properties of hydrogels. Here, we find that poly (N, N-dimethylacrylamide) (PDMA) hydrogels suffer from phase separation in aqueous sodium hydroxide solutions when the concentration is higher than 2 M. The polymer volume fraction and mechanical properties show an abrupt change around the transition point. We utilize this phase separation mechanism to synthesize tough magnetic PDMA hydrogels with the in-situ precipitation method. For comparison, we also prepared magnetic poly (2-acrylamido-2-methyl-propane sulfonic acid sodium) (PNaAMPS) magnetic hydrogels, where no phase separation occurs. The phase-separated magnetic PDMA hydrogels exhibit an extraordinarily high toughness of similar to 1000 J m(-2) while non-phase-separated magnetic PNaAMPS hydrogels only show a toughness of similar to 1 J m(-2), three orders of magnitude lower than that of PDMA hydrogels. This phase separation mechanism may become a new approach to prepare tough magnetic hydrogels and inspire more applications. Published by AIP Publishing.

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GB/T 7714 Tang, Jingda , Li, Chenghai , Li, Haomin et al. Phase-separation induced extraordinary toughening of magnetic hydrogels [J]. | JOURNAL OF APPLIED PHYSICS , 2018 , 123 (18) .
MLA Tang, Jingda et al. "Phase-separation induced extraordinary toughening of magnetic hydrogels" . | JOURNAL OF APPLIED PHYSICS 123 . 18 (2018) .
APA Tang, Jingda , Li, Chenghai , Li, Haomin , Lv, Zengyao , Sheng, Hao , Lu, Tongqing et al. Phase-separation induced extraordinary toughening of magnetic hydrogels . | JOURNAL OF APPLIED PHYSICS , 2018 , 123 (18) .
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Impulsive Response of Rectangular Metal Sandwich Plate with a Graded Foam Core EI SCIE Scopus
期刊论文 | 2018 , 10 (6) | INTERNATIONAL JOURNAL OF APPLIED MECHANICS
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An analytical study considering inhomogeneous core compression is conducted to investigate the impulsive response of fully clamped rectangular metal sandwich plate with a graded foam (G F) core. The dynamic compressive properties of GF under impulsive loading are theoretically modeled antecedently. The approximate analytical predictions are achieved for the impulsive response of rectangular sandwich plate with a linear strength distributed CF core along the thickness by using the relevant loci of a new yield criterion. The analytical predictions agree well with the finite element (FE) results and indicate that the sandwich plates with negative gradient design outperform their uniform counter-parts in impulsive resistance. The present study provides an insight into understanding the blast resistance of the sandwich structures with inhomogeneous cores.

Keyword :

dynamic response Graded foam core impulsive loading metal sandwich plate

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GB/T 7714 Xiang, Chunping , Qin, Qinghua , Wang, Fangfang et al. Impulsive Response of Rectangular Metal Sandwich Plate with a Graded Foam Core [J]. | INTERNATIONAL JOURNAL OF APPLIED MECHANICS , 2018 , 10 (6) .
MLA Xiang, Chunping et al. "Impulsive Response of Rectangular Metal Sandwich Plate with a Graded Foam Core" . | INTERNATIONAL JOURNAL OF APPLIED MECHANICS 10 . 6 (2018) .
APA Xiang, Chunping , Qin, Qinghua , Wang, Fangfang , Yu, Xuehui , Wang, Mingshi , Zhang, Jianxun et al. Impulsive Response of Rectangular Metal Sandwich Plate with a Graded Foam Core . | INTERNATIONAL JOURNAL OF APPLIED MECHANICS , 2018 , 10 (6) .
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