Pub Date : 2011-09-01DOI: 10.1109/NATPC.2011.6136410
A. Lubis, M. Sudin, B. Ariwahjoedi
Jatropha oil has been known as alternative substitute for diesel fuel but its potential use as lubricant is not much known yet. Esterified jatropha oil has been successfully synthesized through esterification process to be used as lubricant additives. This study is meant to investigate wear preventive characteristics of esterified jatropha oil as potential renewable lubricant additives. The characteristics were obtained using four ball test configuration. Addition of low percentage esterified jatropha oil to mineral oil is found to have good effect in reducing wear.
{"title":"Wear preventive characteristics of esterified jatropha oil","authors":"A. Lubis, M. Sudin, B. Ariwahjoedi","doi":"10.1109/NATPC.2011.6136410","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136410","url":null,"abstract":"Jatropha oil has been known as alternative substitute for diesel fuel but its potential use as lubricant is not much known yet. Esterified jatropha oil has been successfully synthesized through esterification process to be used as lubricant additives. This study is meant to investigate wear preventive characteristics of esterified jatropha oil as potential renewable lubricant additives. The characteristics were obtained using four ball test configuration. Addition of low percentage esterified jatropha oil to mineral oil is found to have good effect in reducing wear.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"60 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80561791","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 : 2011-09-01DOI: 10.1109/NATPC.2011.6136467
M. Hashmet, B. Demiral, Mohamed Ali, M. Kashif
Chemical flooding, in particular ASP flooding is of increasing interest because of current high prices and the need to increase oil production. Recent lab research has shown significant benefits to using surfactants at high PH even if the oil has a low acid no. & thus little if any surfactant is generated in-situ. So high ph surfactant-polymer flooding is also of great current interest. Normally, the problem in water flooding is unfavorable Mobility Ratio and because of it viscous fingering may occur and as a result of viscous fingering early break through will be observed, so low oil recovery will be obtained. The viscosity and the size of the emulsion formed in the reservoir is of great importance because if the size is too large and viscosity is high it can plug the pore spaces thus reducing the overall recovery and if the size is too small and viscosity is very low than the desirable sweep efficiency will not be achieved thus again causing reduction in recovery.
{"title":"Rheology of enhanced oil recovery polymers-a review","authors":"M. Hashmet, B. Demiral, Mohamed Ali, M. Kashif","doi":"10.1109/NATPC.2011.6136467","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136467","url":null,"abstract":"Chemical flooding, in particular ASP flooding is of increasing interest because of current high prices and the need to increase oil production. Recent lab research has shown significant benefits to using surfactants at high PH even if the oil has a low acid no. & thus little if any surfactant is generated in-situ. So high ph surfactant-polymer flooding is also of great current interest. Normally, the problem in water flooding is unfavorable Mobility Ratio and because of it viscous fingering may occur and as a result of viscous fingering early break through will be observed, so low oil recovery will be obtained. The viscosity and the size of the emulsion formed in the reservoir is of great importance because if the size is too large and viscosity is high it can plug the pore spaces thus reducing the overall recovery and if the size is too small and viscosity is very low than the desirable sweep efficiency will not be achieved thus again causing reduction in recovery.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"84 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90292337","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 : 2011-09-01DOI: 10.1109/NATPC.2011.6136295
Intan Najua Kamal-Nasir, D. D. Dominic
Our healthcare system nowadays is far more advanced from what we are twenty years ago. Adding to that, healthcare system is moving towards computerization and informative era. At this moment, implementation of Knowledge Management (KM) within healthcare system is very popular and motivating subject to focus. This paper listed and discussed two challenges faced by the Malaysian healthcare system, followed with the state of the art of the combination of KM and IT within healthcare system. The main KM mechanism focused in this paper is knowledge integration and knowledge sharing. We believe the successful of knowledge integration lead to opening the door to knowledge sharing. As the result, we suggested a theoretical framework for healthcare portal in Malaysia to encourage knowledge sharing using a case study scenario.
{"title":"A proposed framework for healthcare portal in Malaysia to encourage knowledge sharing","authors":"Intan Najua Kamal-Nasir, D. D. Dominic","doi":"10.1109/NATPC.2011.6136295","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136295","url":null,"abstract":"Our healthcare system nowadays is far more advanced from what we are twenty years ago. Adding to that, healthcare system is moving towards computerization and informative era. At this moment, implementation of Knowledge Management (KM) within healthcare system is very popular and motivating subject to focus. This paper listed and discussed two challenges faced by the Malaysian healthcare system, followed with the state of the art of the combination of KM and IT within healthcare system. The main KM mechanism focused in this paper is knowledge integration and knowledge sharing. We believe the successful of knowledge integration lead to opening the door to knowledge sharing. As the result, we suggested a theoretical framework for healthcare portal in Malaysia to encourage knowledge sharing using a case study scenario.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"91 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84949760","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 : 2011-09-01DOI: 10.1109/NATPC.2011.6136434
M. Kashif, Nadeem Nasir, M. Akhtar, N. Yahya
The heating of crude oil by using electromagnetic waves can enhanced the recovery of crude oil due to reduction in its viscosity and assisting in its movement. This paper describes effect of electromagnetic waves on oil recovery by using curve twin dipole antenna with four magnetic feeders in the radio frequency region. Two similar core rock samples were use in this study. The porosity and permeability of the core samples were measured by using Poroperm System. Oil saturated core rock samples were kept in tank filled with brine of 10000ppm salinity for efficient oil recovery. These core rock samples were kept at room temperature and 55°C with and without electromagnetic waves. The EM waves emitted by the curve twin antenna with 4 magnetic feeders were able to recover 10.60% of OOIP at room temperature and 29.28% of OOIP at 55°C. Core rock samples without electromagnetic waves give oil recoveries 7.66% of OOIP at room temperature and 23.15% of OOIP at 55°C.
{"title":"Experimental study of electromagnetic waves affects on enhanced oil recovery","authors":"M. Kashif, Nadeem Nasir, M. Akhtar, N. Yahya","doi":"10.1109/NATPC.2011.6136434","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136434","url":null,"abstract":"The heating of crude oil by using electromagnetic waves can enhanced the recovery of crude oil due to reduction in its viscosity and assisting in its movement. This paper describes effect of electromagnetic waves on oil recovery by using curve twin dipole antenna with four magnetic feeders in the radio frequency region. Two similar core rock samples were use in this study. The porosity and permeability of the core samples were measured by using Poroperm System. Oil saturated core rock samples were kept in tank filled with brine of 10000ppm salinity for efficient oil recovery. These core rock samples were kept at room temperature and 55°C with and without electromagnetic waves. The EM waves emitted by the curve twin antenna with 4 magnetic feeders were able to recover 10.60% of OOIP at room temperature and 29.28% of OOIP at 55°C. Core rock samples without electromagnetic waves give oil recoveries 7.66% of OOIP at room temperature and 23.15% of OOIP at 55°C.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"72 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84149506","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 : 2011-09-01DOI: 10.1109/NATPC.2011.6136429
S. Socheatra, N. Ali, G. A. Ellis, A. Ahmadi
Testing of digital systems has been widely researched and studied. Many test methods have been developed and used. However, traditional voltage and current testing are not sufficient in modern integrated circuit (IC) design. This paper introduces a new method using electromagnetic field (EMF) generated from a circuit, which can be used to detect and diagnose possible faults in millimeter scale circuit. CST Microwave Studio and SONNET EM simulator are used to simulate detection of magnetic field intensity above several microstrip lines which are shorted and opened. Furthermore, the models have been fabricated on FR4 and measured the transmission coefficients by Network Analyzer. Both simulation and measurement show that faults in circuits result in high Standing wave for both short and open cases. Open line tends to induce higher Standing Wave (SW) than short line.
{"title":"Feasibility investigation of fault diagnosis using electromagnetic analysis of planar structures","authors":"S. Socheatra, N. Ali, G. A. Ellis, A. Ahmadi","doi":"10.1109/NATPC.2011.6136429","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136429","url":null,"abstract":"Testing of digital systems has been widely researched and studied. Many test methods have been developed and used. However, traditional voltage and current testing are not sufficient in modern integrated circuit (IC) design. This paper introduces a new method using electromagnetic field (EMF) generated from a circuit, which can be used to detect and diagnose possible faults in millimeter scale circuit. CST Microwave Studio and SONNET EM simulator are used to simulate detection of magnetic field intensity above several microstrip lines which are shorted and opened. Furthermore, the models have been fabricated on FR4 and measured the transmission coefficients by Network Analyzer. Both simulation and measurement show that faults in circuits result in high Standing wave for both short and open cases. Open line tends to induce higher Standing Wave (SW) than short line.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83640811","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 : 2011-09-01DOI: 10.1109/NATPC.2011.6136448
M. Jafarpour, R. Nulit
An overview of biochemical and physiological consequences of the over expression of C4 -cycle genes in C3 plant are presented. The methodology, based on the evolutionary situation, has enabled enzymes involved in the C4 pathway to be expressed at high levels and in required sites in the leaves of C3 plants. Even though overproduction of a single C4 enzyme can modify the carbon metabolism of C3 plants, it does not show any positive effects on photosynthesis. Transgenic C3 plants overproducing multiple enzymes are now being produced for improving the photosynthetic performance of C3 plants. The results show that a combined over expression of C4 -cycle genes could supply additional information on whether or not these enzymes may work in concert. Single over expression of C4 -cycle genes might perturb metabolism, as all C4 enzyme also have individual functions in c3 plants. The analysis of double and multiple transformants might help to highlight the possibility of the approach to create a single cell C4 cycle in C3 crops.
{"title":"An overview of over-expression of C4-cycle enzymes into C3 plants","authors":"M. Jafarpour, R. Nulit","doi":"10.1109/NATPC.2011.6136448","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136448","url":null,"abstract":"An overview of biochemical and physiological consequences of the over expression of C<inf>4</inf> -cycle genes in C<inf>3</inf> plant are presented. The methodology, based on the evolutionary situation, has enabled enzymes involved in the C<inf>4</inf> pathway to be expressed at high levels and in required sites in the leaves of C<inf>3</inf> plants. Even though overproduction of a single C<inf>4</inf> enzyme can modify the carbon metabolism of C<inf>3</inf> plants, it does not show any positive effects on photosynthesis. Transgenic C<inf>3</inf> plants overproducing multiple enzymes are now being produced for improving the photosynthetic performance of C<inf>3</inf> plants. The results show that a combined over expression of C<inf>4</inf> -cycle genes could supply additional information on whether or not these enzymes may work in concert. Single over expression of C<inf>4</inf> -cycle genes might perturb metabolism, as all C<inf>4</inf> enzyme also have individual functions in c<inf>3</inf> plants. The analysis of double and multiple transformants might help to highlight the possibility of the approach to create a single cell C<inf>4</inf> cycle in C<inf>3</inf> crops.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"31 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79140061","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 : 2011-09-01DOI: 10.1109/NATPC.2011.6136540
M. Mathialagan, H. Ismail
Curing behaviour, tensile and morphological properties of bentonite (Bt) filled Ethylene-Propylene-Diene Monomer (EPDM) composites at various Bt loading were investigated. EPDM/Bt composites were prepared using a laboratory size two-roll mill by adding 0 to 70 part per hundred rubber (phr) of Bt. Curing time (t90) and scorch time (tS2) were reduced initially with 0 to 30 phr Bt loading and increased subsequently at 50 and 70 phr. Results obtained showed that tensile strength and elongation at break of EPDM/Bt composites were increased with incorporation of 0 to 50 phr Bt and decreased at 70 phr Bt loading, whereas the tensile modulus at 100% elongation (M100) showed an increasing trend with increasing Bt loading from 0 to 70 phr. Scanning Electron Microscope (SEM) was used to examine the morphology of tensile fractured surface which revealed the good interaction between Bt particles and EPDM to an optimum Bt loading of 50 phr and agglomeration of Bt particles at 70 phr.
{"title":"The effect of bentonite loading on the curing, tensile and morphological properties of Ethylene-Propylene-Diene Monomer (EPDM) composites","authors":"M. Mathialagan, H. Ismail","doi":"10.1109/NATPC.2011.6136540","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136540","url":null,"abstract":"Curing behaviour, tensile and morphological properties of bentonite (Bt) filled Ethylene-Propylene-Diene Monomer (EPDM) composites at various Bt loading were investigated. EPDM/Bt composites were prepared using a laboratory size two-roll mill by adding 0 to 70 part per hundred rubber (phr) of Bt. Curing time (t90) and scorch time (tS2) were reduced initially with 0 to 30 phr Bt loading and increased subsequently at 50 and 70 phr. Results obtained showed that tensile strength and elongation at break of EPDM/Bt composites were increased with incorporation of 0 to 50 phr Bt and decreased at 70 phr Bt loading, whereas the tensile modulus at 100% elongation (M100) showed an increasing trend with increasing Bt loading from 0 to 70 phr. Scanning Electron Microscope (SEM) was used to examine the morphology of tensile fractured surface which revealed the good interaction between Bt particles and EPDM to an optimum Bt loading of 50 phr and agglomeration of Bt particles at 70 phr.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"22 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78389477","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 : 2011-09-01DOI: 10.1109/NATPC.2011.6136397
Nadhrah Mohd Jamaludin, A. Rani
The process cycle time in injection moulding process depends significantly on the cooling time of the plastic part, which is facilitated by the cooling channels in the injection mould. Effective cooling channel design in the mould is important because it not only affects cycle time but also the part quality. Conventional cooling channels are normally made of straight drilled holes in the mould, which have limitations in geometric complexity as well as cooling fluid mobility within the injection n mould. Over the years, conformal cooling techniques are being introduced as effective alternative to conventional cooling. Many process of Rapid Tooling (RT) have been proven useful for designing the conformal cooling channels to enhance the cooling time for injection moulding process. Nevertheless, no studies had been published where the additive fabrication technique of three-dimensional printer (3DP), has been used to make an injection molding tools extended to the optimum configuration of fin trees in cooling channels of injection molding process. At one point, the cooling effectiveness of the fin tree would approach an asymptotic limit. Further attempts at improvement would not give benefits commensurate with the required effort. To identify this optimum solution is the ultimate objective of the chosen research problem by combining both experimental and numerical approaches. Design of mould was carried out using commercial computer aided design software Solid Work while the part cooling time is optimized by conformal cooling channels in the mould using the ANSYS thermal analysis software.
{"title":"Optimum configuration of fin trees in cooling channels of injection moulding process","authors":"Nadhrah Mohd Jamaludin, A. Rani","doi":"10.1109/NATPC.2011.6136397","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136397","url":null,"abstract":"The process cycle time in injection moulding process depends significantly on the cooling time of the plastic part, which is facilitated by the cooling channels in the injection mould. Effective cooling channel design in the mould is important because it not only affects cycle time but also the part quality. Conventional cooling channels are normally made of straight drilled holes in the mould, which have limitations in geometric complexity as well as cooling fluid mobility within the injection n mould. Over the years, conformal cooling techniques are being introduced as effective alternative to conventional cooling. Many process of Rapid Tooling (RT) have been proven useful for designing the conformal cooling channels to enhance the cooling time for injection moulding process. Nevertheless, no studies had been published where the additive fabrication technique of three-dimensional printer (3DP), has been used to make an injection molding tools extended to the optimum configuration of fin trees in cooling channels of injection molding process. At one point, the cooling effectiveness of the fin tree would approach an asymptotic limit. Further attempts at improvement would not give benefits commensurate with the required effort. To identify this optimum solution is the ultimate objective of the chosen research problem by combining both experimental and numerical approaches. Design of mould was carried out using commercial computer aided design software Solid Work while the part cooling time is optimized by conformal cooling channels in the mould using the ANSYS thermal analysis software.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"96 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78615212","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 : 2011-09-01DOI: 10.1109/NATPC.2011.6136352
N. Kiong, Z. Akasah
Industrialized Building System(IBS) is one of the construction method that utilized where the components are manufactured in factory or in-situ. Each components are produced in a controlled and monitored environment, transported and installed with minimum workforce. This system are widely used in Malaysia and commonly there are six types of IBS which known as precast concrete frame, formwork system, steel formwork system, steel frame system, prefabricated timber system, block work systems and other innovative system. But at the same time, when a building was built by the IBS system, there are lots of maintenance problem that affect the building operation and quality. Hence, the factor that affect the quality of the IBS building should be identify and find out the solution to overcome the problem. Thus, this study will focus on poor practicing in design stage, manufacturing stage and construction stage that affect the quality of the building which leads to building maintenance. The objective of this study is to identify the factors of defect during design, construction and manufacturing stage of precast concrete that affect the quality of the building, then identify factors that are related to poor maintenance consideration during design, manufacturing and construction stage and last but not least to recommend solutions to overcome problem. All the data collection will be done in the form of questionnaire and distributed to the contractors, consultants and manufacturers. The IBS building maintenance problem in civil and architectural will be collect after the feedback from the potential respondent and analysis through the Statistical Package for the Social Science (SPSS) and note down in a check list. Hopefully from the analysis, a crucial part of the factor that affect the quality of the precast concrete building will be identified and will be supported through the propose suggestion and solution that will reduce the cost and time of maintenance in IBS building which use the precast concrete method.
{"title":"Maintenance factor for precast concrete in IBS: A review","authors":"N. Kiong, Z. Akasah","doi":"10.1109/NATPC.2011.6136352","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136352","url":null,"abstract":"Industrialized Building System(IBS) is one of the construction method that utilized where the components are manufactured in factory or in-situ. Each components are produced in a controlled and monitored environment, transported and installed with minimum workforce. This system are widely used in Malaysia and commonly there are six types of IBS which known as precast concrete frame, formwork system, steel formwork system, steel frame system, prefabricated timber system, block work systems and other innovative system. But at the same time, when a building was built by the IBS system, there are lots of maintenance problem that affect the building operation and quality. Hence, the factor that affect the quality of the IBS building should be identify and find out the solution to overcome the problem. Thus, this study will focus on poor practicing in design stage, manufacturing stage and construction stage that affect the quality of the building which leads to building maintenance. The objective of this study is to identify the factors of defect during design, construction and manufacturing stage of precast concrete that affect the quality of the building, then identify factors that are related to poor maintenance consideration during design, manufacturing and construction stage and last but not least to recommend solutions to overcome problem. All the data collection will be done in the form of questionnaire and distributed to the contractors, consultants and manufacturers. The IBS building maintenance problem in civil and architectural will be collect after the feedback from the potential respondent and analysis through the Statistical Package for the Social Science (SPSS) and note down in a check list. Hopefully from the analysis, a crucial part of the factor that affect the quality of the precast concrete building will be identified and will be supported through the propose suggestion and solution that will reduce the cost and time of maintenance in IBS building which use the precast concrete method.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"42 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79519144","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 : 2011-09-01DOI: 10.1109/NATPC.2011.6136394
E. Mohammadpour, M. Awang
An effective continuum/finite element (FE) approach for modeling the structure and the deformation of single- and multi-wall carbon nanotubes (CNTs) is presented. Individual tubes are modeled using Frame like structure with beam elements., The effect of van der Waals forces, crucial in multi-wall nanotubes, is simulated by the construction of spring elements. The success of this new CNT modeling approach is verified by comparing simulations of deformation of single-wall nanotubes with molecular dynamics results available in the literature. Simulations of final deformed configurations are in excellent agreement with the atomistic models for various deformations. The approach was then applied to the multi-wall carbon nanotubes (MWNTs), and the deformed configurations were compared to corresponding pervious data. The proposed approach successfully predicts the experimentally observed values mechanical behavior of SWCNTs and MWNTs. Presented results demonstrate that the proposed FE technique could provide a valuable tool for studying the mechanical behavior of different type of nanotubes, as well as their effectiveness as load-bearing entities in nanocomposite materials.
{"title":"A finite element model for predicting the tensile behavior of carbon naotube","authors":"E. Mohammadpour, M. Awang","doi":"10.1109/NATPC.2011.6136394","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136394","url":null,"abstract":"An effective continuum/finite element (FE) approach for modeling the structure and the deformation of single- and multi-wall carbon nanotubes (CNTs) is presented. Individual tubes are modeled using Frame like structure with beam elements., The effect of van der Waals forces, crucial in multi-wall nanotubes, is simulated by the construction of spring elements. The success of this new CNT modeling approach is verified by comparing simulations of deformation of single-wall nanotubes with molecular dynamics results available in the literature. Simulations of final deformed configurations are in excellent agreement with the atomistic models for various deformations. The approach was then applied to the multi-wall carbon nanotubes (MWNTs), and the deformed configurations were compared to corresponding pervious data. The proposed approach successfully predicts the experimentally observed values mechanical behavior of SWCNTs and MWNTs. Presented results demonstrate that the proposed FE technique could provide a valuable tool for studying the mechanical behavior of different type of nanotubes, as well as their effectiveness as load-bearing entities in nanocomposite materials.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"17 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75890634","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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