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学者姓名：卢天健
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Abstract ：
The displacement of relatively rigid beads within a relatively compliant, elastic matrix can be used to measure the mechanical properties of the matrix. For example, in mechanobiological studies, magnetic or reflective beads can be displaced with a known external force to estimate the matrix modulus. Although such beads are generally rigid compared to the matrix, the material surrounding the beads typically differs from the matrix in one or two ways. The first case, as is common in mechanobiological experimentation, is the situation in which the bead must be coated with materials such as protein ligands that enable adhesion to the matrix. These layers typically differ in stiffness relative to the matrix material. The second case, common for uncoated beads, is the situation in which the beads disrupt the structure of the hydrogel or polymer, leading to a region of enhanced or reduced stiffness in the neighborhood of the bead. To address both cases, we developed the first analytical solution of the problem of translation of a coated, rigid spherical inclusion displaced within an isotropic elastic matrix by a remotely applied force. The solution is applicable to cases of arbitrary coating stiffness and size of the coating. We conclude by discussing applications of the solution to mechanobiology.
Keyword ：
coated inclusion force-displacement relationship magnetic bead rheometry translation of an inclusion
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| GB/T 7714 | Chen, X , Li, MX , Liu, SB et al. Translation of a Coated Rigid Spherical Inclusion in an Elastic Matrix: Exact Solution, and Implications for Mechanobiology [J]. | JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME , 2019 , 86 (5) : 051002 . |
| MLA | Chen, X et al. "Translation of a Coated Rigid Spherical Inclusion in an Elastic Matrix: Exact Solution, and Implications for Mechanobiology" . | JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME 86 . 5 (2019) : 051002 . |
| APA | Chen, X , Li, MX , Liu, SB , Liu, FS , Genin, GM , Xu, F et al. Translation of a Coated Rigid Spherical Inclusion in an Elastic Matrix: Exact Solution, and Implications for Mechanobiology . | JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME , 2019 , 86 (5) , 051002 . |
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Abstract ：
To further improve the sound absorption enhancement of flexible micro-perforated panels (FMPPs), a new sort of perforated sound absorbers - metamaterial-based micro-perforated panels (MMPPs) - is proposed by combining a micro-perforated host panel and local resonators (LRs) attached on a sub-wavelength scale, targeting the flexural waves. Theoretical and numerical models show that MMPPs are able to further enhance sound absorption in a wide frequency range. The theoretical model is developed based on the effective medium method as the structural wavelength in the host panel is much larger than the distance between the LRs, and the full simulation model, including viscothermal effects, is conducted by utilizing multi-physical coupling integrated in COMSOL. Besides, a structural finite element unit cell method is used to evaluate the stop band behavior of the MMPP. Good agreement is achieved between the theoretically predicted acoustical properties and the simulation results for both conventional FMPPs and the proposed MMPPs, validating the numerical and theoretical models. Both models reveal that the sound absorption enhancement of the MMPP stems from the resulting acoustic surface impedance improvement, caused by the sub-wavelength attached local resonances. The effect of key properties of the LRs (i.e. mass, damping and multiple resonances) on the sound absorption performance of MMPPs is then analyzed by applying the theoretical model and effective frequency-adjustability of the absorption enhancement performance is found. The proposed MMPP shows great potential for the noise reduction industry. (C) 2018 Elsevier Ltd. All rights reserved.
Keyword ：
Absorption improvement Effective medium method Metamaterial Micro-perforated panel Stop band
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| GB/T 7714 | Ren, S. W. , Van Belle, L. , Claeys, C. et al. Improvement of the sound absorption of flexible micro-perforated panels by local resonances [J]. | MECHANICAL SYSTEMS AND SIGNAL PROCESSING , 2019 , 117 : 138-156 . |
| MLA | Ren, S. W. et al. "Improvement of the sound absorption of flexible micro-perforated panels by local resonances" . | MECHANICAL SYSTEMS AND SIGNAL PROCESSING 117 (2019) : 138-156 . |
| APA | Ren, S. W. , Van Belle, L. , Claeys, C. , Xin, F. X. , Lu, T. J. , Deckers, E. et al. Improvement of the sound absorption of flexible micro-perforated panels by local resonances . | MECHANICAL SYSTEMS AND SIGNAL PROCESSING , 2019 , 117 , 138-156 . |
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Abstract ：
Dual-level stress plateaus (i.e., relatively short peak stress plateaus, followed by prolonged crushing stress plateaus) in metallic hexagonal honeycombs subjected to out-of-plane impact loading are characterized using a combined numerical and analytical study, with the influence of the strain-rate sensitivity of the honeycomb parent material accounted for. The predictions are validated against existing experimental measurements, and good agreement is achieved. It is demonstrated that honeycombs exhibit dual-level stress plateaus when bucklewaves are initiated and propagate in cell walls, followed by buckling and progressive folding of the cell walls. The abrupt stress drop from peak to crushing plateau in the compressive stress versus strain curve can be explained in a way similar to the quasi-static buckling of a clamped plate. The duration of the peak stress plateau is more evident for strain-rate insensitive honeycombs. © 2018, The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences and Springer-Verlag GmbH Germany, part of Springer Nature.
Keyword ：
Analytical studies Clamped plates Hexagonal honeycomb Honeycomb Impact loadings Parent materials Quasi-static buckling Strain rate sensitivity
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| GB/T 7714 | Li, Lang , Zhao, Zhenyu , Zhang, Rui et al. Dual-level stress plateaus in honeycombs subjected to impact loading: perspectives from bucklewaves, buckling and cell-wall progressive folding [J]. | Acta Mechanica Sinica/Lixue Xuebao , 2019 , 35 (1) : 70-77 . |
| MLA | Li, Lang et al. "Dual-level stress plateaus in honeycombs subjected to impact loading: perspectives from bucklewaves, buckling and cell-wall progressive folding" . | Acta Mechanica Sinica/Lixue Xuebao 35 . 1 (2019) : 70-77 . |
| APA | Li, Lang , Zhao, Zhenyu , Zhang, Rui , Han, Bin , Zhang, Qiancheng , Lu, Tian Jian . Dual-level stress plateaus in honeycombs subjected to impact loading: perspectives from bucklewaves, buckling and cell-wall progressive folding . | Acta Mechanica Sinica/Lixue Xuebao , 2019 , 35 (1) , 70-77 . |
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Abstract ：
© 2018, The Author(s). We demonstrate acoustically triggered giant deformation of soft materials, and reveal the snap-through instability and bifurcation behavior of soft materials in nonlinear deformation regime in response to combined loading of mechanical and acoustic radiation forces. Our theoretical results suggest that acoustomechanical instability and bifurcation can be readily modulated by varying either the mechanical or acoustic force. This modulation functionality arises from the sensitivity of acoustic wave propagation to nonlinear deformation of soft material, particularly to ratio of initial geometrical size of soft material to acoustic wavelength in the material. The tunable acoustomechanical instability and bifurcation behavior of soft materials enables innovative design of programmable mechanical metamaterials. PACS numbers: 43.35.+d, 43.25.+y, 46.70.De, 61.41.+e.
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| GB/T 7714 | Xin, Fengxian , Lu, Tian Jian . Modulation of acoustomechanical instability and bifurcation behavior of soft materials [J]. | Scientific Reports , 2018 , 8 . |
| MLA | Xin, Fengxian et al. "Modulation of acoustomechanical instability and bifurcation behavior of soft materials" . | Scientific Reports 8 (2018) . |
| APA | Xin, Fengxian , Lu, Tian Jian . Modulation of acoustomechanical instability and bifurcation behavior of soft materials . | Scientific Reports , 2018 , 8 . |
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Abstract ：
Many structures and materials in nature and physiology have important "meso-scale" structures at the micron length-scale whose tensile responses have proven difficult to characterize mechanically. Although techniques such as atomic force microscopy and micro- and nano-identation are mature for compression and indentation testing at the nano-scale, and standard uniaxial and shear rheometry techniques exist for the macroscale, few techniques are applicable for tensile-testing at the micrometre-scale, leaving a gap in our understanding of hierarchical biomaterials. Here, we present a novel magnetic mechanical testing (MMT) system that enables viscoelastic tensile testing at this critical length scale. The MMT system applies non-contact loading, avoiding gripping and surface interaction effects. We demonstrate application of the MMT system to the first analyses of the pure tensile responses of several native and engineered tissue systems at the mesoscale, showing the broad potential of the system for exploring micro- and meso-scale analysis of structured and hierarchical biological systems.
Keyword ：
Hierarchical biomaterials Mechanical testing Microscale analysis Non-contact actuation
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| GB/T 7714 | Li, Yuhui , Hong, Yuan , Xu, Guang-Kui et al. Non-contact tensile viscoelastic characterization of microscale biological materials [J]. | ACTA MECHANICA SINICA , 2018 , 34 (3) : 589-599 . |
| MLA | Li, Yuhui et al. "Non-contact tensile viscoelastic characterization of microscale biological materials" . | ACTA MECHANICA SINICA 34 . 3 (2018) : 589-599 . |
| APA | Li, Yuhui , Hong, Yuan , Xu, Guang-Kui , Liu, Shaobao , Shi, Qiang , Tang, Deding et al. Non-contact tensile viscoelastic characterization of microscale biological materials . | ACTA MECHANICA SINICA , 2018 , 34 (3) , 589-599 . |
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Abstract ：
A novel sandwich core topology - corrugated channels (periodic fluid-through wavy passages) - was proposed for simultaneous load-bearing and active cooling applications. Relative to a sandwich panel with parallel plate channels, the sandwich with corrugated channel core exhibits not only significantly enhanced convective heat transfer rate but also superior mechanical performance. To explore the underlying deformation and failure mech-anisms, corrugated-channel-cored sandwich panels (3CSPs) with low relative densities (<1.5%) were manufactured, with Ti-6Al-4V alloy used as the constituent material for both the core and the face sheets. The quasi-static, out-of-plane compressive behaviors of Ti-6Al-4V sandwich panels were systematically studied using a combined experimental, analytical and numerical approach. The compressive strength of the proposed 3CSP was also compared with competing core topologies on the material selection map. With superior structural and thermal efficiency, the corrugated channel core is promising for a wide variety of multifunctional lightweight sandwich constructions. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword ：
Buckling Compressive response Corrugations Sandwich panel Titanium alloy
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| GB/T 7714 | Zhao, Zhen-yu , Han, Bin , Wang, Xin et al. Out-of-plane compression of Ti-6Al-4V sandwich panels with corrugated channel cores [J]. | MATERIALS & DESIGN , 2018 , 137 : 463-472 . |
| MLA | Zhao, Zhen-yu et al. "Out-of-plane compression of Ti-6Al-4V sandwich panels with corrugated channel cores" . | MATERIALS & DESIGN 137 (2018) : 463-472 . |
| APA | Zhao, Zhen-yu , Han, Bin , Wang, Xin , Zhang, Qian-cheng , Lu, Tian Jian . Out-of-plane compression of Ti-6Al-4V sandwich panels with corrugated channel cores . | MATERIALS & DESIGN , 2018 , 137 , 463-472 . |
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Abstract ：
A theoretical model is established to evaluate the sound absorption performance of underwater anechoic layers containing periodically distributed axial holes. Based on the concept for homogenized equivalent layer and on the theory of wave propagation in viscoelastic cylindrical tubes, the transfer function method is used to obtain the absorption coefficient of the anechoic layer adhered on the rigid plate. Three different types of axial holes are considered, the cylindrical, the conical and the horn shaped one. Results obtained with full finite element simulations are used to validate the model predictions. For each hole type, the vibration characteristics of the anechoic layer as well as the propagation of longitudinal and transverse waves in the layer are analyzed in detail to explore the physical mechanisms underlying its absorption performance. Furthermore, a three-dimensional finite element model for oblique incidence is developed to study the effect of hole shape at different incidence angles. The results show that two new absorption peaks appear since the oblique incidence excites two horizontal modes. Among the three hole types, the horn one achieves the best absorption performance at relatively low frequencies both in normal incidence and in oblique incidence. (C) 2018 Elsevier Ltd. All rights reserved.
Keyword ：
Analytical modeling Hole shape Sound absorption Underwater anechoic layer
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| GB/T 7714 | Ye, Changzheng , Liu, Xuewei , Xin, Fengxian et al. Influence of hole shape on sound absorption of underwater anechoic layers [J]. | JOURNAL OF SOUND AND VIBRATION , 2018 , 426 : 54-74 . |
| MLA | Ye, Changzheng et al. "Influence of hole shape on sound absorption of underwater anechoic layers" . | JOURNAL OF SOUND AND VIBRATION 426 (2018) : 54-74 . |
| APA | Ye, Changzheng , Liu, Xuewei , Xin, Fengxian , Lu, Tian Jian . Influence of hole shape on sound absorption of underwater anechoic layers . | JOURNAL OF SOUND AND VIBRATION , 2018 , 426 , 54-74 . |
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Abstract ：
A novel cross-fin heat sink consisting of a series of long fins and a series of perpendicularly arranged short fins was proposed to enhance natural convective heat transfer. The design principle of the cross-fin heat sink was based on overcoming internal thermal fluid-flow defects in a conventional plate-fin heat sink. The thermal performance of the proposed heat sink was compared with a reference plate-fin heat sink in horizontal orientation. A numerical model considering both natural convection and radiation heat transfer was developed to obtain thermal fluid-flow distributions and heat transfer coefficients of both the cross- and plate-fin heat sinks. Corresponding experiments were performed to validate the model predictions. It was demonstrated that, compared to the reference plate-fin heat sink, the cross-fin heat sink enhanced the overall (including natural convection and radiation) and convective (excluding radiation) heat transfer coefficients by 11% and 15%, respectively. Importantly, the enhancement was achieved without increasing the overall volume, material consumption, and too much extra cost. The proposed cross-fin heat sink provides a practical alternative to the widely adopted plate-fin heat sinks. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword ：
Cross-fin heat sink Heat transfer enhancement Natural convection Plate-fin heat sink
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| GB/T 7714 | Feng, Shangsheng , Shi, Meng , Yan, Hongbin et al. Natural convection in a cross-fin heat sink [J]. | APPLIED THERMAL ENGINEERING , 2018 , 132 : 30-37 . |
| MLA | Feng, Shangsheng et al. "Natural convection in a cross-fin heat sink" . | APPLIED THERMAL ENGINEERING 132 (2018) : 30-37 . |
| APA | Feng, Shangsheng , Shi, Meng , Yan, Hongbin , Sun, Shanyouming , Li, Feichen , Lu, Tian Jian . Natural convection in a cross-fin heat sink . | APPLIED THERMAL ENGINEERING , 2018 , 132 , 30-37 . |
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Abstract ：
The global buckling behavior of a vertically standing corrugated sandwich plate subjected to body force and terminal load is analyzed through an improved first order zig-zag shear deformation theory, with the transverse shear effect of face sheets taken into account. When the face sheets are relatively thick and/or the sandwich plate has relatively large thickness to height ratios, the transverse shear effect of the face sheets affects significantly the critical buckling load. The effect becomes more obvious when body force rather than terminal load is applied on the clamped plates. The influence of geometric parameters on critical buckling parameters is also explored.
Keyword ：
Body force Corrugated sandwich Shear effect Stability analysis Zig-zag
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| GB/T 7714 | Li, Fei-Hao , Han, Bin , Zhang, Qian-Cheng et al. Buckling of a standing corrugated sandwich plate subjected to body force and terminal load [J]. | THIN-WALLED STRUCTURES , 2018 , 127 : 688-699 . |
| MLA | Li, Fei-Hao et al. "Buckling of a standing corrugated sandwich plate subjected to body force and terminal load" . | THIN-WALLED STRUCTURES 127 (2018) : 688-699 . |
| APA | Li, Fei-Hao , Han, Bin , Zhang, Qian-Cheng , Jin, Feng , Lu, Tian Jian . Buckling of a standing corrugated sandwich plate subjected to body force and terminal load . | THIN-WALLED STRUCTURES , 2018 , 127 , 688-699 . |
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Abstract ：
© 2018 Elsevier Ltd Fe3O4 nanoparticle-infiltrated chromatography paper is prepared using a low-cost blending method. Upon characterizing the basic material properties of the Fe3O4/paper nanocomposite, beam-, accordion- and star-shaped actuators are constructed using the nanocomposite and the corresponding actuation performance is investigated experimentally. The beam-shaped actuator exhibits a reversible flexural deformation due to low magnetic hysteresis loop of the Fe3O4/paper nanocomposite, maintaining a stable response after 100 cycles. The accordion-shaped actuator can reach a maximum strain of 100% while the star-shaped actuator can capture a spitball twice heavier than itself.
Keyword ：
Actuator Cellulose paper Fe3O4 nanoparticles Magnetic hysteresis Microstructure Nanocomposites
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| GB/T 7714 | Wang, Xin , Han, Bin , Yu, Run-Pei et al. Magnetic-responsive Fe3O4 nanoparticle-impregnated cellulose paper actuators [J]. | Extreme Mechanics Letters , 2018 , 25 : 53-59 . |
| MLA | Wang, Xin et al. "Magnetic-responsive Fe3O4 nanoparticle-impregnated cellulose paper actuators" . | Extreme Mechanics Letters 25 (2018) : 53-59 . |
| APA | Wang, Xin , Han, Bin , Yu, Run-Pei , Li, Fei-Chen , Zhao, Zhen-Yu , Zhang, Qian-Cheng et al. Magnetic-responsive Fe3O4 nanoparticle-impregnated cellulose paper actuators . | Extreme Mechanics Letters , 2018 , 25 , 53-59 . |
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