{"title":"A review on energy harvesting from ocean waves by piezoelectric technology","authors":"N. V. Viet, N. Wu, Q. Wang","doi":"10.1515/jmmm-2016-0161","DOIUrl":"https://doi.org/10.1515/jmmm-2016-0161","url":null,"abstract":"Abstract Piezoelectric materials have been widely used to harvest energy from ocean waves. This review is to introduce and review the development of the technologies. First, from comparison of the three major energy conversion techniques namely electrostatic, electromagnetic and piezoelectric technologies, in terms of power generation capability, transmission efficiency, and structural installation and economic costs, the advantages of applying piezoelectric energy conversion technology are identified. Second, the review sums up different methodologies and designs of harvesting energy from ocean waves based on different piezoelectric effects. In particular, the designs and efficiencies of available harvesters based on the piezoelectric effects from longitudinal, bending, and shear couplings are introduced and discussed. Finally, the futuristic research directions and methods for improving the efficiencies of the piezoelectric harvesters are discussed profoundly in this area.","PeriodicalId":359168,"journal":{"name":"Journal of Modeling in Mechanics and Materials","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130955360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Ye, Chun-ling Zhao, Yang Zhang, Qi Yao, Yanni Xiao
{"title":"Analysis of mechanical properties in bending processes and optimal design of simple tape spring","authors":"H. Ye, Chun-ling Zhao, Yang Zhang, Qi Yao, Yanni Xiao","doi":"10.1515/jmmm-2016-0156","DOIUrl":"https://doi.org/10.1515/jmmm-2016-0156","url":null,"abstract":"Abstract Tape spring is straight, thin-walled, elastic strip with curved cross-section, which can replace traditional hinges by allowing for folding elastically and unfolded releasing stored energy with fewer component parts. This work is devoted to the properties of the folding and deployment of simple tape spring by numerical simulation and experiment method. Firstly, the folding process of tape spring is experimentally investigated using a specially designed test rig and verified by using nonlinear finite element ABAQUS/Standard solver. Then the moment-rotation relationships for symmetric bending are studied, the effects of subtended angle of section, total tape spring length, thickness and cross section radius on the performance of tape spring are investigated. Furthermore, the optimal model of tape spring structure design is established based on the response surface methodology (RSM) and parameter’s effective analysis, which aims at maximum strain energy during the tape-spring hinge deployment and subjects to allowable stress of tape spring. And the interior point algorithm is used to solve the optimal model. The optimal results are of great importance to the design of novel deployable structures with high stability, reliability and lightweight.","PeriodicalId":359168,"journal":{"name":"Journal of Modeling in Mechanics and Materials","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128796004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Two-Dimensional Coarse-Grained Model for Molybdenum Disulphide","authors":"Cuixia Wang, Chao Zhang, T. Rabczuk","doi":"10.1515/JMMM-2017-0007","DOIUrl":"https://doi.org/10.1515/JMMM-2017-0007","url":null,"abstract":"Abstract We parametrize a two-dimensional (2D) coarse-grained (CG) model of molybdenum disulphide (MoS2) with Stillinger Weber (SW) potential in which all SW geometrical parameters are determined analytically from the equilibrium condition for each potential term, while the SW energy parameters are derived analytically based on the valence force field (VFF) model. This parametrization method transfers the accuracy of the VFF model to the SW potential. The uniqueness of the CG model is that the hexagonal lattice symmetry is maintained, and especially, the positions of Moi beads and Si beads in the CG model are the same as Mo atoms and S atoms, respectively, in the atomic SLMoS2, where the subscript i represent the ith order CG level. Owing to its simplicity, the CG model can be used to investigate the adsorption effect on the resonant frequency. We find that the resonant frequency of the oscillation is insensitive to the adsorbed effect.","PeriodicalId":359168,"journal":{"name":"Journal of Modeling in Mechanics and Materials","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122625491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. C. Prasannakumara, B. J. Gireesha, M. Krishnamurthy, R. Gorla
{"title":"Unsteady Boundary Layer Flow and Convective Heat Transfer of a Fluid Particle Suspension with Nanoparticles over a Stretching Surface","authors":"B. C. Prasannakumara, B. J. Gireesha, M. Krishnamurthy, R. Gorla","doi":"10.1515/jmmm-2017-0002","DOIUrl":"https://doi.org/10.1515/jmmm-2017-0002","url":null,"abstract":"Abstract We analyzed the effects of Biot number and non-uniform heat source/sink on boundary layer flow and nonlinear radiative heat transfer of fluid particle suspension over an unsteady stretching surface embedded in a porous medium with nanoparticles. We considered conducting dust particles embedded with -water nanopartcles. The governing equations are transformed into nonlinear ordinary differential equations by using local similarity transformations and solved numerically using Runge–Kutta-Fehlberg-45 order method along with shooting technique. The effects of non-dimensional parameters on velocity and temperature profiles for fluid phase and dust phase are discussed and presented through graphs. Also, friction factor and Nusselt number are discussed and presented through graphs. Comparisons of the present study were made with existing studies under some special assumptions. The present results have an excellent agreement with existing studies. Results indicated that the enhancement in fluid particle interaction parameter increases the heat transfer rate and depreciates the wall friction. Also, radiation parameter has the tendency to increase the temperature profiles of the dusty nanofluid.","PeriodicalId":359168,"journal":{"name":"Journal of Modeling in Mechanics and Materials","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130338611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nonlinear transient and thermal analysis of functionally graded shells using a seven-parameter shell finite element","authors":"Miguel Gutierrez Rivera, J. Reddy","doi":"10.1515/jmmm-2017-0003","DOIUrl":"https://doi.org/10.1515/jmmm-2017-0003","url":null,"abstract":"Abstract In this paper the thermo-mechanical response of functionally graded plates and shells is studied using a continuum shell finite element model with high-order spectral/hp basis functions. The shell element is based on the seven-parameter first-order shear deformation theory, and it does not utilize reduced integration or stabilization ideas and yet exhibits no locking. The static and dynamic response of functionally graded shells, with power-law variation of the constituents, under mechanical and thermal loads is investigated by varying the volume fraction of the constituents. Numerical results for deflections and stresses are presented and compared with available analytical and finite element results from the literature. The performance of the shell element for transient thermal problems is found to be excellent.","PeriodicalId":359168,"journal":{"name":"Journal of Modeling in Mechanics and Materials","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126351282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Eringen’s small length scale coefficient for vibration of axially loaded nonlocal Euler beams with elastic end restraints","authors":"Chao Wang, H. Zhang, N. Challamel, W. Duan","doi":"10.1515/jmmm-2016-0158","DOIUrl":"https://doi.org/10.1515/jmmm-2016-0158","url":null,"abstract":"Abstract This paper presents the calibration of Eringen’s small length scale coefficient e0 for elastically restrained beams (in the context of buckling and axially loaded vibration) on the basis of an interesting connection between a discrete beam model (DBM) and the Eringen’s nonlocal beam model (ENBM). The DBM is formulated from the use of the central finite difference method which has been shown to be equivalent to the Hencky bar-chain model. By solving the discrete beam formulation using the theory of linear difference equations and matching the buckling loads and natural frequencies of the DBM with those of the ENBM, the small length scale coefficient e0 may be calibrated for buckling and vibration beam problems. It is found that by applying the traditional nonlocal continuous boundary conditions, e0 varies with respect to the boundary conditions. However, e0=1/6${e_0} = 1/sqrt 6$ for purely free vibration problems while e0=1/12${e_0} = 1/sqrt {12}$ for buckling problems, irrespective of the boundary conditions, when the continualized discrete boundary conditions are applied. For both traditional continuous and continualized discrete boundary conditions, the value of e0 is found to be dependent on the axial load.","PeriodicalId":359168,"journal":{"name":"Journal of Modeling in Mechanics and Materials","volume":"43 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123173113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Geometrically nonlinear large deformation of CNT-reinforced composite plates with internal column supports","authors":"L. W. Zhang","doi":"10.1515/jmmm-2016-0154","DOIUrl":"https://doi.org/10.1515/jmmm-2016-0154","url":null,"abstract":"Abstract The geometrical nonlinear analysis of internally supported nanocomposite plates subjected to a uniformly distributed load is carried out. This study investigates the effects of internal point/column supports on the large deformation bending of nanocomposite plates reinforced by carbon nanotubes (CNTs) with different types of distributions, namely, uniform and two kinds of functionally graded distributions through the thickness of the plates. Two-dimensional displacement field of the plate is approximated by a set of Improved Moving Least Squares (IMLS) functions. The arc-length iterative algorithm with the modified Newton method is employed to obtain the nonlinear response of nanocomposite plates. Convergence studies indicate the validity and effectiveness of the element-free IMLS-Ritz method. The effects of plate thickness-to-width ratio, volume fraction ratio, and plate aspect ratio on the large deformation behavior of nanocomposite plates under various boundary conditions are examined. To the best of the authors’ knowledge, the problem has not been attempted in the open literature.","PeriodicalId":359168,"journal":{"name":"Journal of Modeling in Mechanics and Materials","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116737319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Magnetoelectric effects in bilayer multiferroic core-shell composites","authors":"H. Wang, E. Pan, W.Q. Chen","doi":"10.1515/jmmm-2016-0151","DOIUrl":"https://doi.org/10.1515/jmmm-2016-0151","url":null,"abstract":"Abstract We investigate magnetoelectric (ME) effects in bilayer multiferroic core-shell composites in this paper. The composites are driven by the radial magnetic field and the induced radial deformation/vibration is studied. Two configurations are considered in a concise and uniform manner mathematically. One is spherical and the other is cylindrical. For bilayer core-shell composites, we show that the geometric configuration has a significant effect on the ME effect in multiferroic core-shell composites for both low-frequency and electromechanical resonance ranges. At the low-frequency range, except for the mechanically clamped case, the ME effects in spherical multiferroic composites are always stronger than that in cylindrical ones. At the electromechanical resonance range, for traction-free case, the fundamental resonance frequency of the spherical multiferroic composite is higher than that of the cylindrical one and thus the corresponding ME effect in spherical composite is stronger than that in cylindrical one.","PeriodicalId":359168,"journal":{"name":"Journal of Modeling in Mechanics and Materials","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125193428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A studying on load transfer in carbon nanotube/epoxy composites under tension","authors":"N. V. Viet, Q. Wang, W. Kuo","doi":"10.1515/jmmm-2016-0153","DOIUrl":"https://doi.org/10.1515/jmmm-2016-0153","url":null,"abstract":"Abstract The shear-lag model is developed to study the effect of geometry and material properties of epoxy and carbon nanotubes on load transfer in carbon nanotube/epoxy composites under tension. The results from proposed shear-lag model are validated by finite element method and the Haque’s model. Results show that the aspect ratio of the half-length to the outer radius of carbon nanotubes and their layer number have significant influence on load transfer in the composites. On the other hand, this research reveals new findings, which are not reported in other previous works. That is, no noticeable influences of the epoxy Young’s modulus and the interface shear modulus between epoxy matrix and carbon nanotube layers are found on load transfer in terms of the saturated stress length. In addition, the carbon nanotube volume percentage is found not affecting the load transfer. This research presents a better understanding on mechanical properties of carbon nanotube/epoxy composites.","PeriodicalId":359168,"journal":{"name":"Journal of Modeling in Mechanics and Materials","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128465452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nonlocal elasticity theory for graphene modeling and simulation: prospects and challenges","authors":"K. Liew, Yang Zhang, L. W. Zhang","doi":"10.1515/jmmm-2016-0159","DOIUrl":"https://doi.org/10.1515/jmmm-2016-0159","url":null,"abstract":"Abstract: This paper presents a literature review of recent research studies on the applications of nonlocal elasticity theory in the modeling and simulation of graphene sheets (GSs). The history, development and excellent properties of GSs are introduced. The details of nonlocal elasticity theory are also presented. A systematic introduction to the application of nonlocal elasticity on linear modeling and nonlinear modeling for single-layer graphene sheets (SLGSs) and multilayered graphene sheets (MLGSs) is also provided. The necessity of determining mechanical parameters and nonlocal parameters is discussed. Recommendations for future work are particularly presented. This work is intended to review the development of GSs, give an introduction to the research studies on nonlocal elasticity theory in the modeling of GSs, and provide recommendations for future research.","PeriodicalId":359168,"journal":{"name":"Journal of Modeling in Mechanics and Materials","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127683875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}