Aiming at rapid publishing original short, important papers from all aspects of theoretical and applied mechanics as well as other interdisciplinary, Theoretical and Applied Mechanics Letters (TAML) is sponsored by the Chinese Society of Theoretical and Applied Mechanics and Institute of Mechanics (CSTAM), Chinese Academy of Sciences (IMCAS), co-published with Elsevier in way of Gold Open Access.
Editor-in-Chief:
Jiachun Li
(Institute of Mechanics, CAS, China)
Yonggang Huang
(Northwestern University, USA)
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Current Issue Archive Online First Most Downloaded
 2016, 6 (6)    10 November 2016     View Papers on Elsevier
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Synergy to discovery and innovation Growth of nanorods
Zhengyang Li, Hanchen Huang
2016 Vol. 6 (6): 249-252
Abstract ( 6 )
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Solid Mechanics
Buckling and post-buckling analyses of size-dependent piezoelectric nanoplates
Chen Liu, Liaoliang Ke, Jie Yang, Sritawat Kitipornchai, Yuesheng Wang
2016 Vol. 6 (6): 253-267
Abstract ( 6 )
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Coriolis effect on responses of rotating thin piezoelectric hollow cylinder
Wenyao Liu, Weiqiu Chen
2016 Vol. 6 (6): 274-276
Abstract ( 9 )
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On the role of piezoelectricity in phonon properties and thermal conductivity of GaN nanofilms
Linli Zhu, Haonan Luo
2016 Vol. 6 (6): 277-281
Abstract ( 8 )
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Fluid Mechanics
Numerical simulation of domain switching in multilayer ferroelectric actuators
Qun Li
2016 Vol. 6 (6): 268-273
Abstract ( 9 )
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On transition of type V interaction in double-wedge flow with non-equilibrium effects
Wentao Xiong, Yujian Zhu, Xisheng Luo
2016 Vol. 6 (6): 282-285
Abstract ( 7 )
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Numerical simulation of Gurney flap on SFYT15thick airfoil
Xi He, Jinjun Wang, Muqing Yang, Dongli Ma, Chao Yan, Peiqing Liu
2016 Vol. 6 (6): 286-292
Abstract ( 8 )
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Sufficiently diffused attachment of nitrogen arc by gasdynamic action
Wenxia Pan, Lewen Chen, Xian Meng, Yong Zhang, Chengkang Wu
2016 Vol. 6 (6): 293-296
Abstract ( 8 )
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Modelling windwave driven by typhoon Chan-Hom (201509) in the East China Sea
H. Q. Zhang, B. C. Nie
2016 Vol. 6 (6): 297-301
Abstract ( 7 )
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Accepted Papers
Direct observation of bunching of elementary steps on protein crystals under forced flow conditions
G. Sazaki, G. Dai
Bunching of elementary steps by solution flow is still not yet clarified for protein crystals. Hence, in this study, we observed elementary steps on crystal surfaces of model protein hen egg-white lysozyme (HEWL) under forced flow conditions, by our advanced optical microscopy. We found that in the case of a HEWL solution of 99.99% purity, forced flow changed bunched steps into elementary ones (debunching) on tetragonal HEWL crystals. In contrast, in the case of a HEWL solution of 98.5% purity, forced flow significantly induced bunching of elementary steps. These results indicate that in the case of HEWL crystals, the mass transfer of impurities is more significantly enhanced by forced solution flow than that of solute HEWL molecules. We also showed that forced flow induced the incorporation of microcrystals into a mother crystal and the subsequent formation of screw dislocations and spiral growth hillocks.
DOI:
Local buckling analysis of biological nanocomposites based on a beam-spring model
Zhiling Bai, Baohua Ji
Biological materials such as bone, tooth and nacre are load-bearing nanocomposites composed of mineral and protein. Since the mineral crystals often have slender geometry, the nanocomposites are susceptible to buckle under the compressive load. In this paper, we analyze the local buckling behaviors of the nanocomposite structure of the biological materials using a beam-spring model by which we can consider plenty of mineral crystals and their interaction in our analysis compared with existing studies. We show that there is a transition of the buckling behaviors from a local buckling mode to a global one when we continuously increase the aspect ratio of mineral, leading to an increase of the buckling strength which levels off to the strength of the composites reinforced with continuous crystals. And we find that the contact condition at the mineral tips has a striking effect on the local buckling mode at small aspect ratio, but the effect diminishes when the aspect ratio is large. Our analyses also show that the staggered arrangement of mineral plays a central role in the stability of the biological nanocomposites.
DOI:
Experimental investigation on electromechanical deformation of dielectric elastomers under different temperatures
Lei Liu, Hualing Chen, Bo Li, Junjie Sheng, Junshi Zhang, Chi Zhang, Yanjie Wang, Dichen Li
Under an applied voltage, dielectric elastomers (DEs) produce an actuation strain that is nonlinear, partly because of the material properties. In this study, an experimental characterization is conducted to evaluate how the ambient temperature and pre-stretch affected the actuation performance. For DEs with a pre-stretch of 2 2, an increase of temperature from -10℃ to 80℃ results in a variation in the actuation strain of more than 1700%. Low pre-stretched DEs are more susceptible to temperature change; while highly pre-stretched DEs are relatively insensitive to temperature, because in this case the energy conversion was dominated by mechanical stretching, rather than thermal conduction, during the actuation.
DOI:
Will oscillating wave surge converters survive tsunamis?
L. O'Brien, P. Christodoulides, E. Renzi, T. Stefanakis, F. Dias
With an increasing emphasis on renewable energy resources, wave power technology is becoming one of the realistic solutions. However, the 2011 tsunami in Japan was a harsh reminder of the ferocity of the ocean. It is known that tsunamis are nearly undetectable in the open ocean but as the wave approaches the shore its energy is compressed, creating large destructive waves. The question posed here is whether an oscillating wave surge converter (OWSC) could withstand the force of an incoming tsunami. Several tools are used to provide an answer: an analytical 3D model developed within the framework of linear theory, a numerical model based on the nonlinear shallow water equations and empirical formulas. Numerical results show that run-up and draw-down can be ampli ed under some circumstances, leading to an OWSC lying on dry ground!
DOI:
Structural optimum design of bistable cylindrical shell for broadband energy harvesting application
Yong Wang, Liming Peng, Zhilong Huang
The shallow cylindrical structure is suitable to develop broadband vibration energy harvesters due to the property of the inherent mechanical bistability. In this letter, the optimum design of the bistable cylindrical shell for broadband energy harvesting application is investigated from the structural point of view. The output power is evaluated by the concept of the harvestable power, which balances the frequency of snap through and the referred output energy associated with each snap through. The non-dimensional harvestable power is analytically expressed as the function of the non-dimensional curvature parameter and one constructed parameter. The universal dependence of the optimal curvature parameter and the associated optimal harvestable power on the constructed parameter is derived, which can be well approximated by the linear relation in double logarithmic coordinate.
DOI:
Size Dependency and Potential Field Influence on Deriving Mechanical Properties of Carbon Nanotubes Using Molecular Dynamics
K. G. S. Dilrukshi, M. A. N. Dewapriya, U. G. A. Puswewala
A thorough understanding on the mechanical properties of carbon nanotube (CNT) is essential in extending the advanced applications of CNT based systems. However, conducting experiments to estimate mechanical properties at this scale is extremely challenging. Therefore, development of mechanistic models to estimate the mechanical properties of CNTs along with the integration of existing continuum mechanics concepts is critically important. This paper presents a comprehensive molecular dynamics simulation study on the size dependency and potential function influence of mechanical properties of CNT. Commonly use REBO and AIREBO potential functions were considered in this regards. Young's modulus and shear modulus of CNTs are derived by integrating classical continuum mechanics concepts with molecular dynamics simulations. The results indicate that the potential function has a significant influence on the estimated mechanical properties of CNTs, and the influence of potential field is much higher when studying the torsional behavior of CNTs than the tensile behavior.
DOI:
2D hierarchical lattices'imperfection sensitivity to missing bars defect
Bo Wang, Yunfeng Shi, Rui Li, Youwei Chen, Yihua Mo
Commercially available lattices contain various kinds of morphological imperfections which result in great degradation in lattices' mechanical properties, therefore, to obtain imperfection insensitive lattice structure is obviously a practical research subject. Hierarchical structure materials were found to be a class of promising anti-defect materials. This paper builds hierarchical lattice by adding soft adhesion to lattice's cell edges and numerical results show that its imperfection sensitivity to missing bars is minor compared with the classic lattice. Soft adhesion with appropriate properties reinforce cell edge's bending stiffness and thus reduce the bending deformation in lattice caused by missing bars defect, which is confirmed by statistical analysis of normalized node displacements of imperfect lattices under hydrostatic compression and shear loads.
DOI:
A convenient look-up table-based method for the compensation of non-linear error in digital fringe projection
Chen Xiong, Jun Yao, Jubing Chen, Hong Miao
Although the structured light system that uses digital fringe projection has been widely implemented in three-dimensional surface profile measurement, the measurement system is susceptible to non-linear error. In this work, we propose a convenient look-up table-based (LUT-based) method to compensate for the non-linear error in captured fringe patterns. Without extra calibration, this LUT-based method completely utilizes the captured fringe pattern by recording the full-field differences. Then, a phase compensation map is established to revise the measured phase. Experimental results demonstrate that this method works effectively.
DOI: 10.1016/j.taml.2015.12.005
A convenient look-up table-based method for the compensation of non-linear error in digital fringe projection
Chen Xiong, Jun Yao, Jubing Chen, Hong Miao
Although the structured light system that uses digital fringe projection has been widely implemented in three-dimensional surface profile measurement, the measurement system is susceptible to non-linear error. In this work, we propose a convenient look-up table-based (LUT-based) method to compensate for the non-linear error in captured fringe patterns. Without extra calibration, this LUT-based method completely utilizes the captured fringe pattern by recording the full-field differences. Then, a phase compensation map is established to revise the measured phase. Experimental results demonstrate that this method works effectively.
DOI: 10.1016/j.taml.2015.12.005
Acoustomechanics of semicrystalline polymers
Fengxian Xin, Tian Jian Lu
We develop an acoustomechanical theory for semicrystalline polymers and demonstrate that acoustic radiation force is capable of causing giant deformation in these materials. When a polymer layer is subjected to combined tensile mechanical force in plane and acoustic force (sound pressure) through thickness, it becomes initially homogenously thin but soon inhomogeneous when the two forces reach critical conditions. Critical conditions for such acoustomechanical instability are theoretically determined based on the J2-deformation theory. We demonstrate that pull-in instability can be acoustically triggered even if the in-plane mechanical force is fixed. Bifurcation in the critical condition for acoustomechanical instability occurs when the polymer exhibits sufficiently large hardening. The findings of this study enable reliability design of novel acoustic actuated devices.
DOI: 10.1016/j.taml.2015.12.004
Investigating the failure mechanisms of a spudcan penetrating next to an existing footprint
V. Kong, M. J Cassidy, C. Gaudin
Reinstallation of mobile jack-up rigs next to existing footprints is a problematic operation because the spudcan located near the footprints is subjected to eccentric and/or inclined loading conditions. Geotechnical centrifuge studies have measured these loads for combinations of changing footprint geometry, footprint soil properties and the offset of the reinstallation from the footprint centre. These tests have been of full model spudcans in order to accurately measure the combined loads developed. They have not provided information on the mechanisms of failure occurring during this complex installation. In this paper, observations from a visualization test, where a half spudcan is penetrated against a transparent window in a geotechnical centrifuge, are reported. The mechanisms of failure at different stages during the penetration are presented.
DOI:
  News
Congratulation! The co-editor-in-chief, Yonggang Huang, elected to United States National Academy of Engineering
SECOND ANNOUNCEMENT for The 14th Asian Symposium on Visualization, May 22–26, 2017, Beijing, China
Weiqiu Chen was Awarded the Title of Distinguished Professor of 2015 Changjiang Schloar Program
Proposals for IUTAM Symposia and IUTAM Summer Schools 2018 & 2019
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