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学者姓名:王铁军

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Dynamic failures of metal sandwich beams subjected to low-velocity impact SCIE
期刊论文 | 2019 , 59 (4) , 1413-1420 | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS
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Abstract :

Sandwich structures are widely used in engineering due to their superior mechanical properties. In the present paper, the failure modes of fully clamped sandwich beams with aluminum foam cores subjected to low-velocity impact on the mid-span were investigated experimentally and theoretically. Two dominant failure modes were observed through the drop-weight tests, which are core shear and indentation. Based on the experimental observations, a failure mechanism map was constructed theoretically by utilizing the quasi-static method. It is found that the quasi-static method is valid to predict the failure modes of the sandwich beams under impact.

Keyword :

Sandwich beams failure mechanism map failure modes low-velocity impact

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GB/T 7714 Xiang, Chunping , Qin, Qinghua , Yu, Xuehui et al. Dynamic failures of metal sandwich beams subjected to low-velocity impact [J]. | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS , 2019 , 59 (4) : 1413-1420 .
MLA Xiang, Chunping et al. "Dynamic failures of metal sandwich beams subjected to low-velocity impact" . | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS 59 . 4 (2019) : 1413-1420 .
APA Xiang, Chunping , Qin, Qinghua , Yu, Xuehui , Chen, Shangjun , Zhang, Wei , Xia, Yuanming et al. Dynamic failures of metal sandwich beams subjected to low-velocity impact . | INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS , 2019 , 59 (4) , 1413-1420 .
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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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Hydrogel 3D printing with the capacitor edge effect SCIE
期刊论文 | 2019 , 5 (3) | SCIENCE ADVANCES
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Recent decades have seen intense developments of hydrogel applications for cell cultures, tissue engineering, soft robotics, and ionic devices. Advanced fabrication techniques for hydrogel structures are being developed to meet user-specified requirements. Existing hydrogel 3D printing techniques place substantial constraints on the physical and chemical properties of hydrogel precursors as well as the printed hydrogel structures. This study proposes a novel method for patterning liquids with a resolution of 100 mu m by using the capacitor edge effect. We establish a complete hydrogel 3D printing system combining the patterning and stacking processes. This technique is applicable to a wide variety of hydrogels, overcoming the limitations of existing techniques. We demonstrate printed hydrogel structures including a hydrogel scaffold, a hydrogel composite that responds sensitively to temperature, and an ionic high-integrity hydrogel display device. The proposed technique offers great opportunities in rapid prototyping hydrogel devices using multiple compositions and complex geometries.

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GB/T 7714 Wang, Jikun , Lu, Tongqing , Yang, Meng et al. Hydrogel 3D printing with the capacitor edge effect [J]. | SCIENCE ADVANCES , 2019 , 5 (3) .
MLA Wang, Jikun et al. "Hydrogel 3D printing with the capacitor edge effect" . | SCIENCE ADVANCES 5 . 3 (2019) .
APA Wang, Jikun , Lu, Tongqing , Yang, Meng , Sun, Danqi , Xia, Yukun , Wang, Tiejun . Hydrogel 3D printing with the capacitor edge effect . | SCIENCE ADVANCES , 2019 , 5 (3) .
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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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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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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: 8 SCOPUS Cited Count: 8
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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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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
WoS CC Cited Count: 3 SCOPUS Cited Count: 3
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Abstract :

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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Sintering resistance of advanced plasma-sprayed thermal barrier coatings with strain-tolerant microstructures EI SCIE Scopus
期刊论文 | 2018 , 38 (15) , 5092-5100 | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
WoS CC Cited Count: 6 SCOPUS Cited Count: 5
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Abstract :

Sintering is one of the key issues in the high temperature service of thermal barrier coatings (TBCs), considering the continuously increasing operation temperature of gas-turbine for higher energy efficiency. Based on the conventional processing method of air plasma spraying (APS), suspension plasma spraying (SPS) technique has been developed recently, in order to improve the strain tolerance of TBCs. This strain tolerance of plasma sprayed TBCs is largely effected by the sintering behavior, which is presently not fully understood. In this work, evolution of mechanical properties, in terms of Young's modulus and viscosity, is systematically investigated by in-situ three-point bending test at 1200 degrees C on free-standing coatings, including micro-cracked APS, segmented APS, vertically cracked SPS and columnar structured SPS TBCs and correlated to the microstructural evolution. Based on experimental results, power law relations are proposed for the sintering induced mechanical evolution, which deepen the understanding of the sintering behavior of plasma-sprayed TBCs.

Keyword :

Mechanical properties Plasma-spraying Sintering Thermal barrier coatings

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GB/T 7714 Lv, Bowen , Mucke, Robert , Fan, Xueling et al. Sintering resistance of advanced plasma-sprayed thermal barrier coatings with strain-tolerant microstructures [J]. | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY , 2018 , 38 (15) : 5092-5100 .
MLA Lv, Bowen et al. "Sintering resistance of advanced plasma-sprayed thermal barrier coatings with strain-tolerant microstructures" . | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 38 . 15 (2018) : 5092-5100 .
APA Lv, Bowen , Mucke, Robert , Fan, Xueling , Wang, T. J. , Guillon, Olivier , Vassen, Robert . Sintering resistance of advanced plasma-sprayed thermal barrier coatings with strain-tolerant microstructures . | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY , 2018 , 38 (15) , 5092-5100 .
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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: 41
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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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Advances in oxidation and ablation resistance of high and ultra-high temperature ceramics modified or coated carbon/carbon composites Scopus
期刊论文 | 2018 , 38 (1) , 1-28 | Journal of the European Ceramic Society
WoS CC Cited Count: 21 SCOPUS Cited Count: 47
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© 2017 Elsevier Ltd 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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