Pub Date : 2015-03-01DOI: 10.1061/(ASCE)NM.2153-5477.0000067
D. Liu, W. Q. Chen
AbstractThe mechanical behavior of materials/structures at nanoscales has been shown, either experimentally or numerically, to be size-dependent. An accurate analysis of a nano-sized multilayer film/substrate structure subject to temperature variation is developed in the present paper. The size-dependent character is captured by adopting the modified couple stress theory. In addition, the effect of bonding imperfection between any two consecutive layers in the structure is considered by using a linear slip-type weak interface model. In the analysis, each layer is modeled as a non-classical Euler-Bernoulli beam incorporating the couple stress. An efficient state-space formulation for the multilayer structure is presented. Comparisons of the axial force, deflection and interfacial shear stress predicted by the present model with those by the classical beam model are made in cases of a Ni film/Epoxy substrate bilayer and of a Ni film/Ni film/Epoxy substrate trilayer. The results show that a nano-sized struct...
{"title":"Size-Dependent Thermomechanical Responses of Nano-Sized Multilayers","authors":"D. Liu, W. Q. Chen","doi":"10.1061/(ASCE)NM.2153-5477.0000067","DOIUrl":"https://doi.org/10.1061/(ASCE)NM.2153-5477.0000067","url":null,"abstract":"AbstractThe mechanical behavior of materials/structures at nanoscales has been shown, either experimentally or numerically, to be size-dependent. An accurate analysis of a nano-sized multilayer film/substrate structure subject to temperature variation is developed in the present paper. The size-dependent character is captured by adopting the modified couple stress theory. In addition, the effect of bonding imperfection between any two consecutive layers in the structure is considered by using a linear slip-type weak interface model. In the analysis, each layer is modeled as a non-classical Euler-Bernoulli beam incorporating the couple stress. An efficient state-space formulation for the multilayer structure is presented. Comparisons of the axial force, deflection and interfacial shear stress predicted by the present model with those by the classical beam model are made in cases of a Ni film/Epoxy substrate bilayer and of a Ni film/Ni film/Epoxy substrate trilayer. The results show that a nano-sized struct...","PeriodicalId":90606,"journal":{"name":"Journal of nanomechanics & micromechanics","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)NM.2153-5477.0000067","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58476803","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}
Pub Date : 2015-03-01DOI: 10.1061/(ASCE)NM.2153-5477.0000071
K. Marynowski
AbstractThe problem of the axially moving microscale panel based on the modified couple stress theory and the principle of minimum total potential energy is analyzed. The mathematical model of the considered system contains the internal material length parameter and can capture the size effect. The equation of equilibrium states of the axially moving panel tensioned with the constant longitudinal load is derived. As a direct application of the model, an axially moving microscale panel with two simply supported and two free longitudinal edges is solved. The effects of the transport speed, the length scale parameter, and the geometry of the microscale panel on the dynamic behavior of the axially moving system are presented. The investigation results show that the dynamic behavior of the panel in the overcritical range of transport speed is mostly affected by time histories of lowest frequencies of free flexural vibrations.
{"title":"Axially Moving Microscale Panel Model Based on Modified Couple Stress Theory","authors":"K. Marynowski","doi":"10.1061/(ASCE)NM.2153-5477.0000071","DOIUrl":"https://doi.org/10.1061/(ASCE)NM.2153-5477.0000071","url":null,"abstract":"AbstractThe problem of the axially moving microscale panel based on the modified couple stress theory and the principle of minimum total potential energy is analyzed. The mathematical model of the considered system contains the internal material length parameter and can capture the size effect. The equation of equilibrium states of the axially moving panel tensioned with the constant longitudinal load is derived. As a direct application of the model, an axially moving microscale panel with two simply supported and two free longitudinal edges is solved. The effects of the transport speed, the length scale parameter, and the geometry of the microscale panel on the dynamic behavior of the axially moving system are presented. The investigation results show that the dynamic behavior of the panel in the overcritical range of transport speed is mostly affected by time histories of lowest frequencies of free flexural vibrations.","PeriodicalId":90606,"journal":{"name":"Journal of nanomechanics & micromechanics","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)NM.2153-5477.0000071","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58476611","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}
Pub Date : 2015-03-01DOI: 10.1061/(ASCE)NM.2153-5477.0000062
N. Challamel, Zhen Zhang, C. Wang
This paper is focused on the buckling and the vibration analyses of microstructured structural elements, i.e., elements composed of repetitive structural cells. The relationship between the discrete and the equivalent nonlocal continuum is specifically addressed from a numerical and a theoretical point of view. The microstructured beam considered herein is modeled by some repetitive cells composed of finite rigid segments and elastic rotational springs. The microstructure may come from the discreteness of the matter for small-scale structures (such as for nanotechnology applications), but it can also be related to some larger scales as for civil engineering applications. The buckling and vibration results of the discrete system are numerically obtained from a discrete-element code, whereas the nonlocal-based results for the equivalent continuum can be analytically performed. It is shown that Eringen's nonlocal elasticity coupled to the Euler-Bernoulli beam theory is relevant to capture the main-scale phenomena of such a microstructured continuum. The small-scale coefficient of the equivalent nonlocal continuum is identified from the specific microstructure features, namely, the length of each cell. However, the length scale calibration depends on the type of analysis, namely, static versus dynamic analysis. A perfect agreement is found for the microstructured beam with simply supported boundary conditions. The specific identification of the equivalent stiffness for modeling the equivalent clamped continuum is also discussed. The equivalent stiffness of the discrete system appears to be dependent on the static-dynamic analyses, but also on the boundary conditions applied to the overall system. Satisfactory results are also obtained for the comparison between the discrete and the equivalent continuum for other type of boundary conditions.
{"title":"Nonlocal equivalent continua for buckling and vibration analyses of microstructured beams","authors":"N. Challamel, Zhen Zhang, C. Wang","doi":"10.1061/(ASCE)NM.2153-5477.0000062","DOIUrl":"https://doi.org/10.1061/(ASCE)NM.2153-5477.0000062","url":null,"abstract":"This paper is focused on the buckling and the vibration analyses of microstructured structural elements, i.e., elements composed of repetitive structural cells. The relationship between the discrete and the equivalent nonlocal continuum is specifically addressed from a numerical and a theoretical point of view. The microstructured beam considered herein is modeled by some repetitive cells composed of finite rigid segments and elastic rotational springs. The microstructure may come from the discreteness of the matter for small-scale structures (such as for nanotechnology applications), but it can also be related to some larger scales as for civil engineering applications. The buckling and vibration results of the discrete system are numerically obtained from a discrete-element code, whereas the nonlocal-based results for the equivalent continuum can be analytically performed. It is shown that Eringen's nonlocal elasticity coupled to the Euler-Bernoulli beam theory is relevant to capture the main-scale phenomena of such a microstructured continuum. The small-scale coefficient of the equivalent nonlocal continuum is identified from the specific microstructure features, namely, the length of each cell. However, the length scale calibration depends on the type of analysis, namely, static versus dynamic analysis. A perfect agreement is found for the microstructured beam with simply supported boundary conditions. The specific identification of the equivalent stiffness for modeling the equivalent clamped continuum is also discussed. The equivalent stiffness of the discrete system appears to be dependent on the static-dynamic analyses, but also on the boundary conditions applied to the overall system. Satisfactory results are also obtained for the comparison between the discrete and the equivalent continuum for other type of boundary conditions.","PeriodicalId":90606,"journal":{"name":"Journal of nanomechanics & micromechanics","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)NM.2153-5477.0000062","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58476511","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}
Pub Date : 2014-12-01DOI: 10.1061/(ASCE)NM.2153-5477.0000070
K. Hatami, A. Hassanikhah, H. Yazdani, B. Grady
Abstract A study has been conducted to develop a new generation of geosynthetic materials based on the tensoresistivity of polymers filled with electrically conducting particles. These materials, called sensor-enabled geosynthetics (SEGs), allow their tensile strains to be measured without the need for conventional instrumentation (e.g., strain gauges). This paper reports a recent SEG development in which tensoresistive composites made of carbon black–filled plasticized PVC were formulated for the coating of polyester yarns, which are commonly used in commercially manufactured geogrids. Hence, the resulting geogrids are termed sensor-enabled geogrids (SEGGs). The effectiveness of three different blending methods to form the tensoresistive composites was examined by using the statistical consistency of the corresponding electrical conductivity results. The viscosity and stiffness of the resulting materials were measured to evaluate their pliability for industrial production purposes. In addition, a series ...
{"title":"Tensoresistive PVC Coating for Sensor-Enabled Geogrids","authors":"K. Hatami, A. Hassanikhah, H. Yazdani, B. Grady","doi":"10.1061/(ASCE)NM.2153-5477.0000070","DOIUrl":"https://doi.org/10.1061/(ASCE)NM.2153-5477.0000070","url":null,"abstract":"Abstract A study has been conducted to develop a new generation of geosynthetic materials based on the tensoresistivity of polymers filled with electrically conducting particles. These materials, called sensor-enabled geosynthetics (SEGs), allow their tensile strains to be measured without the need for conventional instrumentation (e.g., strain gauges). This paper reports a recent SEG development in which tensoresistive composites made of carbon black–filled plasticized PVC were formulated for the coating of polyester yarns, which are commonly used in commercially manufactured geogrids. Hence, the resulting geogrids are termed sensor-enabled geogrids (SEGGs). The effectiveness of three different blending methods to form the tensoresistive composites was examined by using the statistical consistency of the corresponding electrical conductivity results. The viscosity and stiffness of the resulting materials were measured to evaluate their pliability for industrial production purposes. In addition, a series ...","PeriodicalId":90606,"journal":{"name":"Journal of nanomechanics & micromechanics","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)NM.2153-5477.0000070","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58476521","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}
Pub Date : 2014-12-01DOI: 10.1061/(ASCE)NM.2153-5477.0000089
P. Marur
AbstractThe elastic interaction of a misfitting hollow inclusion embedded in a matrix, under remote tensile loading, is analyzed. Closed form analytical expressions are obtained for both perfectly bonded and debonded conditions using solid harmonics. The debonding is modeled as a displacement discontinuity, which permits relative displacement at the interface in the tangential and normal direction. The displacement jump across the interface is related to the corresponding traction force using a linear spring model. The theoretical results are validated with the results obtained from finite-element analysis. Using the analytical expressions, the influence of various geometrical and material properties of the inclusion and the matrix on the stress field around the inclusion is studied. The parametric stress analysis shows that the interface conditions influence the state of stress in the inclusion significantly.
{"title":"Analysis of an Imperfectly Bonded Hollow Inclusion in an Infinite Medium","authors":"P. Marur","doi":"10.1061/(ASCE)NM.2153-5477.0000089","DOIUrl":"https://doi.org/10.1061/(ASCE)NM.2153-5477.0000089","url":null,"abstract":"AbstractThe elastic interaction of a misfitting hollow inclusion embedded in a matrix, under remote tensile loading, is analyzed. Closed form analytical expressions are obtained for both perfectly bonded and debonded conditions using solid harmonics. The debonding is modeled as a displacement discontinuity, which permits relative displacement at the interface in the tangential and normal direction. The displacement jump across the interface is related to the corresponding traction force using a linear spring model. The theoretical results are validated with the results obtained from finite-element analysis. Using the analytical expressions, the influence of various geometrical and material properties of the inclusion and the matrix on the stress field around the inclusion is studied. The parametric stress analysis shows that the interface conditions influence the state of stress in the inclusion significantly.","PeriodicalId":90606,"journal":{"name":"Journal of nanomechanics & micromechanics","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)NM.2153-5477.0000089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58478723","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}
Pub Date : 2014-12-01DOI: 10.1061/(ASCE)NM.2153-5477.0000063
Shao-Huan Cheng, C. Sun
AbstractBy adopting the local virial stress, the authors overcome the barrier of ambiguous crack-tip stress field in molecular dynamics (MD) simulations and perform direct calculations of fracture toughness. Both MD and corresponding continuum finite-element method (FEM) solutions indicate that fracture toughness measured in stress intensity factor (or energy release rate) decreases with the decreasing crack length. Accordingly, fracture toughness cannot be treated as a material constant when the crack length is several nanometers. The size-dependent behavior of fracture toughness is explained in terms of the size of the singular stress zone (the K-dominance zone). It is found that as the crack length decreases, the K-dominance zone also decreases, making the singular part of the crack-tip stress not capable of accounting for the full fracture driving force. As a result, the critical stress intensity factor at failure (the fracture toughness) is lowered whereas the remote failure stress is raised.
{"title":"Size-Dependent Fracture Toughness of Nanoscale Structures: Crack-Tip Stress Approach in Molecular Dynamics","authors":"Shao-Huan Cheng, C. Sun","doi":"10.1061/(ASCE)NM.2153-5477.0000063","DOIUrl":"https://doi.org/10.1061/(ASCE)NM.2153-5477.0000063","url":null,"abstract":"AbstractBy adopting the local virial stress, the authors overcome the barrier of ambiguous crack-tip stress field in molecular dynamics (MD) simulations and perform direct calculations of fracture toughness. Both MD and corresponding continuum finite-element method (FEM) solutions indicate that fracture toughness measured in stress intensity factor (or energy release rate) decreases with the decreasing crack length. Accordingly, fracture toughness cannot be treated as a material constant when the crack length is several nanometers. The size-dependent behavior of fracture toughness is explained in terms of the size of the singular stress zone (the K-dominance zone). It is found that as the crack length decreases, the K-dominance zone also decreases, making the singular part of the crack-tip stress not capable of accounting for the full fracture driving force. As a result, the critical stress intensity factor at failure (the fracture toughness) is lowered whereas the remote failure stress is raised.","PeriodicalId":90606,"journal":{"name":"Journal of nanomechanics & micromechanics","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)NM.2153-5477.0000063","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58476106","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}
Pub Date : 2014-12-01DOI: 10.1061/(ASCE)NM.2153-5477.0000065
Rui Li, L. Sun
AbstractThis paper introduces a novel class of three-phase magnetorheological (MR) nanocomposites reinforced with multiwalled carbon nanotubes. Microstructures of the nanocomposites are characterized with the scanning electron microscopy. The dynamic viscoelastic responses are investigated under the combined magnetic fields and dynamic mechanical loads in both compression and shear modes. Experimental data demonstrate that the three-phase nanocomposites exhibit not only higher zero-magnetic-field stiffness and damping performance than conventional MR elastomers, but also higher magnetic-field-induced increase in these dynamic properties, which confirms the superiority of the proposed MR nanocomposites over conventional MR elastomers.
{"title":"Dynamic Viscoelastic Behavior of Multiwalled Carbon Nanotube–Reinforced Magnetorheological (MR) Nanocomposites","authors":"Rui Li, L. Sun","doi":"10.1061/(ASCE)NM.2153-5477.0000065","DOIUrl":"https://doi.org/10.1061/(ASCE)NM.2153-5477.0000065","url":null,"abstract":"AbstractThis paper introduces a novel class of three-phase magnetorheological (MR) nanocomposites reinforced with multiwalled carbon nanotubes. Microstructures of the nanocomposites are characterized with the scanning electron microscopy. The dynamic viscoelastic responses are investigated under the combined magnetic fields and dynamic mechanical loads in both compression and shear modes. Experimental data demonstrate that the three-phase nanocomposites exhibit not only higher zero-magnetic-field stiffness and damping performance than conventional MR elastomers, but also higher magnetic-field-induced increase in these dynamic properties, which confirms the superiority of the proposed MR nanocomposites over conventional MR elastomers.","PeriodicalId":90606,"journal":{"name":"Journal of nanomechanics & micromechanics","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)NM.2153-5477.0000065","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58476583","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}
Pub Date : 2014-12-01DOI: 10.1061/(ASCE)NM.2153-5477.0000068
A. Naderi, A. Saidi
AbstractThis article presents a modified nonlocal Mindlin plate theory for stability analysis of nanoplates subjected to both uniaxial and biaxial in-plane loadings. Closed-form solutions of buckling load are presented according to the nonlocal Kirchhoff, first-order and higher-order shear deformation plate theories for simply supported rectangular plates. It is shown that the nonlocal shear deformation plate theories cannot predict the critical buckling load correctly because the buckling load approaches zero as the mode numbers approach infinity. To find the critical buckling load by accounting for either the small scale or the shear deformation effects, a modified nonlocal first-order shear deformation plate theory is adapted. Finally, the critical buckling load and buckling mode numbers of nanoplates are obtained on the basis of the presented modified theory. The results show that variation of buckling load versus the mode number is physically acceptable.
{"title":"Modified Nonlocal Mindlin Plate Theory for Buckling Analysis of Nanoplates","authors":"A. Naderi, A. Saidi","doi":"10.1061/(ASCE)NM.2153-5477.0000068","DOIUrl":"https://doi.org/10.1061/(ASCE)NM.2153-5477.0000068","url":null,"abstract":"AbstractThis article presents a modified nonlocal Mindlin plate theory for stability analysis of nanoplates subjected to both uniaxial and biaxial in-plane loadings. Closed-form solutions of buckling load are presented according to the nonlocal Kirchhoff, first-order and higher-order shear deformation plate theories for simply supported rectangular plates. It is shown that the nonlocal shear deformation plate theories cannot predict the critical buckling load correctly because the buckling load approaches zero as the mode numbers approach infinity. To find the critical buckling load by accounting for either the small scale or the shear deformation effects, a modified nonlocal first-order shear deformation plate theory is adapted. Finally, the critical buckling load and buckling mode numbers of nanoplates are obtained on the basis of the presented modified theory. The results show that variation of buckling load versus the mode number is physically acceptable.","PeriodicalId":90606,"journal":{"name":"Journal of nanomechanics & micromechanics","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)NM.2153-5477.0000068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58476948","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}
Pub Date : 2014-09-01DOI: 10.1061/(ASCE)NM.2153-5477.0000094
Matthew Becton, L. Zhang, Xianqiao Wang
AbstractNanoporous graphene has emerged as a powerful alternative to conventional membrane filters and gained an appreciable popularity in a variety of applications because of its many remarkable and unique properties. Careful regulation of the size and density of nanopores can generate graphene membranes with controllable selectivity and flow rate, thereby greatly enhancing the potential marketability of graphene-based membranes. In this research, molecular dynamics simulation is employed to systematically investigate the mechanistic and quantitative effect of significant parameters such as temperature, impact energy, strain, and pore density on the nanopore morphology of graphene by impacting fullerenes into a graphene sheet. Simulation results have demonstrated that both nanopore size and morphology in a graphene sheet can be tailored by carefully controlling the energy of the impact cluster, the temperature of the environment, and the strain applied on the graphene sheet. This serves as a conceptual g...
{"title":"Molecular Dynamics Study of Programmable Nanoporous Graphene","authors":"Matthew Becton, L. Zhang, Xianqiao Wang","doi":"10.1061/(ASCE)NM.2153-5477.0000094","DOIUrl":"https://doi.org/10.1061/(ASCE)NM.2153-5477.0000094","url":null,"abstract":"AbstractNanoporous graphene has emerged as a powerful alternative to conventional membrane filters and gained an appreciable popularity in a variety of applications because of its many remarkable and unique properties. Careful regulation of the size and density of nanopores can generate graphene membranes with controllable selectivity and flow rate, thereby greatly enhancing the potential marketability of graphene-based membranes. In this research, molecular dynamics simulation is employed to systematically investigate the mechanistic and quantitative effect of significant parameters such as temperature, impact energy, strain, and pore density on the nanopore morphology of graphene by impacting fullerenes into a graphene sheet. Simulation results have demonstrated that both nanopore size and morphology in a graphene sheet can be tailored by carefully controlling the energy of the impact cluster, the temperature of the environment, and the strain applied on the graphene sheet. This serves as a conceptual g...","PeriodicalId":90606,"journal":{"name":"Journal of nanomechanics & micromechanics","volume":"1160 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)NM.2153-5477.0000094","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58478581","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}
Pub Date : 2014-09-01DOI: 10.1061/(ASCE)NM.2153-5477.0000086
Judy P. Yang
AbstractFor high-resolution medical images, an image-based procedure is developed in strong form to perform microstructure analysis. Consider heterogeneous biomaterials such as bone tissue with porous composition—the associated microscopic cell problems and homogenized mechanical properties have been derived through the asymptotic homogenization to correlate the hierarchy in the macroscale and microscale. Nevertheless, for bioimages with highly irregular geometry, the process of model reconstruction by the traditional mesh-based methods unavoidably encounters issues such as mesh dependency and mesh distortion. Upon using the level set technique for model reconstruction, images of biological tissue showing complex topology can be identified and segmented into different phases effectively, such as the solid skeleton and pores in bone materials. In particular, the employment of the strong form collocation method takes advantage of point discretization and constitutes a seamlessly computational framework for ...
{"title":"Image-Based Procedure for Biostructure Modeling","authors":"Judy P. Yang","doi":"10.1061/(ASCE)NM.2153-5477.0000086","DOIUrl":"https://doi.org/10.1061/(ASCE)NM.2153-5477.0000086","url":null,"abstract":"AbstractFor high-resolution medical images, an image-based procedure is developed in strong form to perform microstructure analysis. Consider heterogeneous biomaterials such as bone tissue with porous composition—the associated microscopic cell problems and homogenized mechanical properties have been derived through the asymptotic homogenization to correlate the hierarchy in the macroscale and microscale. Nevertheless, for bioimages with highly irregular geometry, the process of model reconstruction by the traditional mesh-based methods unavoidably encounters issues such as mesh dependency and mesh distortion. Upon using the level set technique for model reconstruction, images of biological tissue showing complex topology can be identified and segmented into different phases effectively, such as the solid skeleton and pores in bone materials. In particular, the employment of the strong form collocation method takes advantage of point discretization and constitutes a seamlessly computational framework for ...","PeriodicalId":90606,"journal":{"name":"Journal of nanomechanics & micromechanics","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1061/(ASCE)NM.2153-5477.0000086","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58478053","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}
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