Pub Date : 2012-12-01DOI: 10.5923/J.JMEA.20120206.05
M. Silveira, L. Vasconcelos, A. Christoforo
The use of numerical simu lations in the design of automotive components has contributed to reducing the design time, decreasing the prototypes costs and increasing reliability of the final product. In addition, the search for solutions of lo w cost and satisfactory performance is essential for the success of the product in the world market. Twist-beam suspensions are an examp le of this co mpetit ive environ ment. This solution presents a very satisfactory performance when applied to light vehicles and has an excellent relationship between cost / benefit in the automotive market. It is estimated that more than 90% of light vehicles manufactured in emergent countries use this type of suspension at the rear. Despite its acceptance in the automotive market there are few studies related to the twist -beam suspension, perhaps because of its simplicity and low cost design and ease of manufa cturing. Un like other types of suspension, the twist-beam has a flexib le torsion beam connecting the swing arms. The evaluation of the deformation of this flexib le element becomes essential to understand their kinemat ic behavior. Thus, the use of software based only on the rigid body dynamics is not suitable to analy ze this type of suspension. The main objective of this work was to evaluate through numerical simu lation based on finite element method, the influence of the torsion beam on the kinematic behavior of a twist-beam suspension. It was evaluated the influence of both the position and orientation of the torsion beam on the suspension, under symmetric and asymmetric loadings.
{"title":"Numerical Simulation of the Kinematic Behavior of a Twist Beam Suspension Using Finite Element Method","authors":"M. Silveira, L. Vasconcelos, A. Christoforo","doi":"10.5923/J.JMEA.20120206.05","DOIUrl":"https://doi.org/10.5923/J.JMEA.20120206.05","url":null,"abstract":"The use of numerical simu lations in the design of automotive components has contributed to reducing the design time, decreasing the prototypes costs and increasing reliability of the final product. In addition, the search for solutions of lo w cost and satisfactory performance is essential for the success of the product in the world market. Twist-beam suspensions are an examp le of this co mpetit ive environ ment. This solution presents a very satisfactory performance when applied to light vehicles and has an excellent relationship between cost / benefit in the automotive market. It is estimated that more than 90% of light vehicles manufactured in emergent countries use this type of suspension at the rear. Despite its acceptance in the automotive market there are few studies related to the twist -beam suspension, perhaps because of its simplicity and low cost design and ease of manufa cturing. Un like other types of suspension, the twist-beam has a flexib le torsion beam connecting the swing arms. The evaluation of the deformation of this flexib le element becomes essential to understand their kinemat ic behavior. Thus, the use of software based only on the rigid body dynamics is not suitable to analy ze this type of suspension. The main objective of this work was to evaluate through numerical simu lation based on finite element method, the influence of the torsion beam on the kinematic behavior of a twist-beam suspension. It was evaluated the influence of both the position and orientation of the torsion beam on the suspension, under symmetric and asymmetric loadings.","PeriodicalId":383435,"journal":{"name":"Journal of Mechanical Engineering and Automation","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115243129","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 : 2012-12-01DOI: 10.5923/J.JMEA.20120205.02
N. Hashimoto, U. Ozguner, M. Yokozuka, S. Kato, O. Matsumoto, S. Tsugawa
Automated vehicles can contribute to the improvement of transportation through their high capacity, increased safety, low emission and high efficiency. However, unstable conditions of automated mobile systems, which include automated vehicles and mobile robots) can cause serious problems, andthus, automated mobile system requiresto be highly reliable. The objective of this research is to develop on analgorith mfor detection faults (unstable condition) in an automated mobile system and to improve the overall reliability of this system. In this study, we in itially stored and updated a few patterns of data constellations under normal and unstable conditions for fault identification through real-world experiments. Multiple experiments were performed in a public urban area (with course distance per set beingapproximately1.1(km)), where several pedestrians, bicycles, and other robots were also present. The method used for detecting faults utilizes Mahalanobis distance, correlat ion coefficient, and linearization in order to enhance the accuracy of detecting faults;further, because real-world experimental conditions vary frequently,it is essential for the proposed method to be robust undervarious conditions. The main feature of this study is that it involves the use of experimental results obtained under real-world conditions, to develop a fault detection algorithm and evaluate its validity. In addition, simu lations were performed using the real-world experimental data, wh ich includes newly logged experimental data after the algorithm was developed in order to evaluate the validity of the proposed algorithm. The simulat ion results show that the proposed algorithm detects faults accurately, thus, they prove its validity.
{"title":"Experimental Study under Real-World Conditions to Develop Fault Detection for Automated Vehicles","authors":"N. Hashimoto, U. Ozguner, M. Yokozuka, S. Kato, O. Matsumoto, S. Tsugawa","doi":"10.5923/J.JMEA.20120205.02","DOIUrl":"https://doi.org/10.5923/J.JMEA.20120205.02","url":null,"abstract":"Automated vehicles can contribute to the improvement of transportation through their high capacity, increased safety, low emission and high efficiency. However, unstable conditions of automated mobile systems, which include automated vehicles and mobile robots) can cause serious problems, andthus, automated mobile system requiresto be highly reliable. The objective of this research is to develop on analgorith mfor detection faults (unstable condition) in an automated mobile system and to improve the overall reliability of this system. In this study, we in itially stored and updated a few patterns of data constellations under normal and unstable conditions for fault identification through real-world experiments. Multiple experiments were performed in a public urban area (with course distance per set beingapproximately1.1(km)), where several pedestrians, bicycles, and other robots were also present. The method used for detecting faults utilizes Mahalanobis distance, correlat ion coefficient, and linearization in order to enhance the accuracy of detecting faults;further, because real-world experimental conditions vary frequently,it is essential for the proposed method to be robust undervarious conditions. The main feature of this study is that it involves the use of experimental results obtained under real-world conditions, to develop a fault detection algorithm and evaluate its validity. In addition, simu lations were performed using the real-world experimental data, wh ich includes newly logged experimental data after the algorithm was developed in order to evaluate the validity of the proposed algorithm. The simulat ion results show that the proposed algorithm detects faults accurately, thus, they prove its validity.","PeriodicalId":383435,"journal":{"name":"Journal of Mechanical Engineering and Automation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133533537","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 : 2012-12-01DOI: 10.5923/J.JMEA.20120206.04
L. Savin, E. Slivinsky, D. Klimov, S. Radin
In this article questions on creation and calculation of a perspect ive design of adaptive torsion suspension for the locomotives, including hydro mechanical dampers of fluctuations of adaptive type. The design procedure of the main kinemat ic and geometrical characteristics on a locomotive examp le 2ТЭ 10Л, supplied with the specified technical solutions, and studying of fluctuations and power loading of its running gears is offered. Thus, the dynamic settlement scheme on the basis of Foygt-Kelv in's elastic and viscous model is developed. The bench pilot studies, allowed to specify parameters and characteristics of the above-stated designs are carried out. Expected economic effect of possible introduction of development will make 850 thousand rubles a year on one locomotive. Materials of this art icle were discussed at various conferences of leading higher education institutions of the Russian Federation. Results of researches are reco mmended to design, research and machine-building structures for their possible use in practice.
{"title":"Complex Research of Perspective Suspension for Locomotives","authors":"L. Savin, E. Slivinsky, D. Klimov, S. Radin","doi":"10.5923/J.JMEA.20120206.04","DOIUrl":"https://doi.org/10.5923/J.JMEA.20120206.04","url":null,"abstract":"In this article questions on creation and calculation of a perspect ive design of adaptive torsion suspension for the locomotives, including hydro mechanical dampers of fluctuations of adaptive type. The design procedure of the main kinemat ic and geometrical characteristics on a locomotive examp le 2ТЭ 10Л, supplied with the specified technical solutions, and studying of fluctuations and power loading of its running gears is offered. Thus, the dynamic settlement scheme on the basis of Foygt-Kelv in's elastic and viscous model is developed. The bench pilot studies, allowed to specify parameters and characteristics of the above-stated designs are carried out. Expected economic effect of possible introduction of development will make 850 thousand rubles a year on one locomotive. Materials of this art icle were discussed at various conferences of leading higher education institutions of the Russian Federation. Results of researches are reco mmended to design, research and machine-building structures for their possible use in practice.","PeriodicalId":383435,"journal":{"name":"Journal of Mechanical Engineering and Automation","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132895222","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 : 2012-08-31DOI: 10.5923/J.JMEA.20110101.02
M. Akhtaruzzaman, A. Shafie
A biped humanoid is considered as an open kinematic chain consisting of two sub chains as legs and torso which connected at a common point, the hip. When defining the gait for stepping stairs, there exist two main phases which are Single Support Phase (SSP) and Double Support Phase (DSP). The challenge is to make the anthropoid stable in its upright position without losing it while performing the two alternating phases, SSP and DSP. In this paper a novel gait for an an- thropomorphic system to step up-down stairs is formulated and experimented using BIOLOID humanoid platform. The gait is merged with various poses which are excogitated through the Forward and Inverse Kinematics (FK and IK) analysis based on Denavit-Hartenberg (D-H) representation and Geometric-Trigonometric (G-T) formulation techniques. The main focus of this paper is to represent and analyze the diverse behaviour of the various joint actuators of the robot while performing the step up and down stairs.
{"title":"Novel Gait for an Anthropoid and Its Joint Demeanors while Stepping Up and Down Stairs","authors":"M. Akhtaruzzaman, A. Shafie","doi":"10.5923/J.JMEA.20110101.02","DOIUrl":"https://doi.org/10.5923/J.JMEA.20110101.02","url":null,"abstract":"A biped humanoid is considered as an open kinematic chain consisting of two sub chains as legs and torso which connected at a common point, the hip. When defining the gait for stepping stairs, there exist two main phases which are Single Support Phase (SSP) and Double Support Phase (DSP). The challenge is to make the anthropoid stable in its upright position without losing it while performing the two alternating phases, SSP and DSP. In this paper a novel gait for an an- thropomorphic system to step up-down stairs is formulated and experimented using BIOLOID humanoid platform. The gait is merged with various poses which are excogitated through the Forward and Inverse Kinematics (FK and IK) analysis based on Denavit-Hartenberg (D-H) representation and Geometric-Trigonometric (G-T) formulation techniques. The main focus of this paper is to represent and analyze the diverse behaviour of the various joint actuators of the robot while performing the step up and down stairs.","PeriodicalId":383435,"journal":{"name":"Journal of Mechanical Engineering and Automation","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130510312","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 : 2012-08-31DOI: 10.5923/J.JMEA.20110101.03
P. Vijay, P. Danaiah, K. Rajesh
A component can be manufactured in several ways. Rapid Prototyping technique is one among the material adding manufacturing process, building up its unique potential in the present scenario. This technique helps manufacture a product from the basic design of the component, thus optimizing the iterative product development process time and creating geometrically complex parts to precise dimensions. In the Rapid Prototyping process, surface finish is critical as it can affect the part accuracy, reduce the post-processing costs and improve the functionality of the parts. This paper presents an ex- perimental design technique for determining the optimal surface finish of a part built by varying Build Orientation, Layer Thickness and keeping other parameters constant using the Fused Deposition Modeling (FDM) process. The design inves- tigates the effect of these parameters on the surface finish. Experiments were conducted using a fractional factorial design with two levels for Layer Thickness and three levels for Build Orientation factor. The results are statistically analyzed to determine the significant factors and their interactions. The significant factors, their interactions and the optimum settings are proposed.
{"title":"Critical Parameters Effecting the Rapid Prototyping Surface Finish","authors":"P. Vijay, P. Danaiah, K. Rajesh","doi":"10.5923/J.JMEA.20110101.03","DOIUrl":"https://doi.org/10.5923/J.JMEA.20110101.03","url":null,"abstract":"A component can be manufactured in several ways. Rapid Prototyping technique is one among the material adding manufacturing process, building up its unique potential in the present scenario. This technique helps manufacture a product from the basic design of the component, thus optimizing the iterative product development process time and creating geometrically complex parts to precise dimensions. In the Rapid Prototyping process, surface finish is critical as it can affect the part accuracy, reduce the post-processing costs and improve the functionality of the parts. This paper presents an ex- perimental design technique for determining the optimal surface finish of a part built by varying Build Orientation, Layer Thickness and keeping other parameters constant using the Fused Deposition Modeling (FDM) process. The design inves- tigates the effect of these parameters on the surface finish. Experiments were conducted using a fractional factorial design with two levels for Layer Thickness and three levels for Build Orientation factor. The results are statistically analyzed to determine the significant factors and their interactions. The significant factors, their interactions and the optimum settings are proposed.","PeriodicalId":383435,"journal":{"name":"Journal of Mechanical Engineering and Automation","volume":"141 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129138018","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 : 2012-08-31DOI: 10.5923/J.JMEA.20110101.01
L. Edwin
In this paper, the “two body abrasive wear characteristics” have been studied for the cylindrical samples of pure epoxy and chemical treated coir fibre filled epoxy polymer composites of the size of 10 mm and 32 mm at different sliding speeds in multiphase conditions. The wear characteristics have been estimated by following two parameters, the normal load and sliding speed in a single pin-on-disc wear testing machine. It has been found that the wear characteristics decreases by increasing the sliding speed in both the cases / samples, pure epoxy and treated coir fibre filled epoxy respectively. Finally, we get that the rate of abrasion for composite is slightly less as compared to pure epoxy polymer composites.
{"title":"Numerical Model to Study of Contact Force in A Cylindrical Roller Bearing with Technical Mechanical Event Simulation","authors":"L. Edwin","doi":"10.5923/J.JMEA.20110101.01","DOIUrl":"https://doi.org/10.5923/J.JMEA.20110101.01","url":null,"abstract":"In this paper, the “two body abrasive wear characteristics” have been studied for the cylindrical samples of pure epoxy and chemical treated coir fibre filled epoxy polymer composites of the size of 10 mm and 32 mm at different sliding speeds in multiphase conditions. The wear characteristics have been estimated by following two parameters, the normal load and sliding speed in a single pin-on-disc wear testing machine. It has been found that the wear characteristics decreases by increasing the sliding speed in both the cases / samples, pure epoxy and treated coir fibre filled epoxy respectively. Finally, we get that the rate of abrasion for composite is slightly less as compared to pure epoxy polymer composites.","PeriodicalId":383435,"journal":{"name":"Journal of Mechanical Engineering and Automation","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116851715","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 : 2012-08-31DOI: 10.5923/J.JMEA.20120201.03
I. Garba, Laminu Shettima Kuburi, F. Anafi
Engineering entrepreneur is of great importance to know about him on the basis of individual consideration. These consideration give him ample scope to face his own self by asking the question "Who I am?" If he can give meaningful answer to this complex question with exemplary courage and utter personal disregard to being exposed, then it helps him in getting a fair idea about himself. On the whole it helps him to making the right decision in choosing the right path for getting involved for deciding the future course of action. This is nothing but a self-identification process. After having being properly identify his strength, weakness and ability, he can make a decision of his choice. The concept of growth theory seems to be closely related in explaining the theory of entrepreneurship development as well. After the Second World War entrepre- neurship received new meaning for attaining economic development within the shortest possible time. To analyse resources utilization and Proper utilization of human potentiality, special attention to take up new activities and to create self-employment and generation of employment opportunity for better economic gain.
{"title":"Relevance of Entreprenuership Curriculum to Engineering Education in Nigeria","authors":"I. Garba, Laminu Shettima Kuburi, F. Anafi","doi":"10.5923/J.JMEA.20120201.03","DOIUrl":"https://doi.org/10.5923/J.JMEA.20120201.03","url":null,"abstract":"Engineering entrepreneur is of great importance to know about him on the basis of individual consideration. These consideration give him ample scope to face his own self by asking the question \"Who I am?\" If he can give meaningful answer to this complex question with exemplary courage and utter personal disregard to being exposed, then it helps him in getting a fair idea about himself. On the whole it helps him to making the right decision in choosing the right path for getting involved for deciding the future course of action. This is nothing but a self-identification process. After having being properly identify his strength, weakness and ability, he can make a decision of his choice. The concept of growth theory seems to be closely related in explaining the theory of entrepreneurship development as well. After the Second World War entrepre- neurship received new meaning for attaining economic development within the shortest possible time. To analyse resources utilization and Proper utilization of human potentiality, special attention to take up new activities and to create self-employment and generation of employment opportunity for better economic gain.","PeriodicalId":383435,"journal":{"name":"Journal of Mechanical Engineering and Automation","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134221101","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 : 2012-08-31DOI: 10.5923/J.JMEA.20120201.04
Gun-Hee Kim, Jeong-Won Lee, Y. Heo, G. Yoon
The polymeric biochip has been focused as a cheap, rapid and simplified method to replace the existing bio- chemical laboratory works. This biochip is formed miniaturized lab functionalities on a chip with the development of MEMS technology. This has many micro-fluidic channels for the flow of sample and reagents, mixing and detection task. Existing technologies for the biochip fabrication are utilizing various micro pattern forming methods, such as etching, LIGA, and micro-imprinting etc. In this study, an injection molding process with micro mold was applied to the mass pro- duction of polymeric biochip which contains micro-fluidic channel. Micro cutting process was applied to fabricate the core feature for molding micro-fluidic channel. Therefore, a series of micro cutting experiments using micro endmill were per- formed to determine optimum cutting conditions. Besides, the low temperature micro-cutting experiments using micro endmills were performed to improve the quality of micro mold core by reducing the burr and surface roughness. After the verification of low temperature micro-cutting process efficiency, this process was used to fabricate required mold core for micro feature. Finally, test injection molding process using manufactured micro mold and COC polymer were performed, and then the results were investigated.
{"title":"Fabrication of Polymeric Biochips With µ-Fluidic Channel by Injection Molding Technology","authors":"Gun-Hee Kim, Jeong-Won Lee, Y. Heo, G. Yoon","doi":"10.5923/J.JMEA.20120201.04","DOIUrl":"https://doi.org/10.5923/J.JMEA.20120201.04","url":null,"abstract":"The polymeric biochip has been focused as a cheap, rapid and simplified method to replace the existing bio- chemical laboratory works. This biochip is formed miniaturized lab functionalities on a chip with the development of MEMS technology. This has many micro-fluidic channels for the flow of sample and reagents, mixing and detection task. Existing technologies for the biochip fabrication are utilizing various micro pattern forming methods, such as etching, LIGA, and micro-imprinting etc. In this study, an injection molding process with micro mold was applied to the mass pro- duction of polymeric biochip which contains micro-fluidic channel. Micro cutting process was applied to fabricate the core feature for molding micro-fluidic channel. Therefore, a series of micro cutting experiments using micro endmill were per- formed to determine optimum cutting conditions. Besides, the low temperature micro-cutting experiments using micro endmills were performed to improve the quality of micro mold core by reducing the burr and surface roughness. After the verification of low temperature micro-cutting process efficiency, this process was used to fabricate required mold core for micro feature. Finally, test injection molding process using manufactured micro mold and COC polymer were performed, and then the results were investigated.","PeriodicalId":383435,"journal":{"name":"Journal of Mechanical Engineering and Automation","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129657635","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 : 2012-08-31DOI: 10.5923/J.JMEA.20120201.05
M. Barzegari, M. Dardel, A. Fathi, M. Pashaei
In last decades, smart materials have developed extensively, and have become an important topic for re- searchers in different areas. SMA is a good candidate for active control of the smart composite structures. In this study, numerical-based analysis for evaluating the natural frequencies and mode shapes of the plate with embedded shape memory alloy wires are presented. Plates are modelled in according to classical plate theory (CPT) as well as first-order shear de- formation plate theory (FSDT). Also, SMA wires are modelled as a beam. The effect of axial load generated by SMA wires due the change of temperature on the natural frequencies is accurately studied.
{"title":"Effect of Shape Memory Alloy Wires on Natural Frequency of Plates","authors":"M. Barzegari, M. Dardel, A. Fathi, M. Pashaei","doi":"10.5923/J.JMEA.20120201.05","DOIUrl":"https://doi.org/10.5923/J.JMEA.20120201.05","url":null,"abstract":"In last decades, smart materials have developed extensively, and have become an important topic for re- searchers in different areas. SMA is a good candidate for active control of the smart composite structures. In this study, numerical-based analysis for evaluating the natural frequencies and mode shapes of the plate with embedded shape memory alloy wires are presented. Plates are modelled in according to classical plate theory (CPT) as well as first-order shear de- formation plate theory (FSDT). Also, SMA wires are modelled as a beam. The effect of axial load generated by SMA wires due the change of temperature on the natural frequencies is accurately studied.","PeriodicalId":383435,"journal":{"name":"Journal of Mechanical Engineering and Automation","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133943312","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 : 2012-08-31DOI: 10.5923/J.JMEA.20120201.02
Zheng Li
Energy efficiency is one of the most important objectives in today’s engineering systems. This paper introduces a new type of energy-saving refrigerating system based on functional and performance studies, computer-aided 3-D modeling, computational fluid dynamic analysis, and the prototype testing. The main advantages of this energy-saving regenerative system include: higher performance efficiency due to less frictional force, simplified mechanical system, less vibration due to its symmetrical structure design, less frictional losses between free piston and cylinder, and cost-saving in mechanism due to low tolerance requirement manufacturing of the system components.
{"title":"Computer-Aided Modeling and Analysis of an Energy-Saving Refrigerating System","authors":"Zheng Li","doi":"10.5923/J.JMEA.20120201.02","DOIUrl":"https://doi.org/10.5923/J.JMEA.20120201.02","url":null,"abstract":"Energy efficiency is one of the most important objectives in today’s engineering systems. This paper introduces a new type of energy-saving refrigerating system based on functional and performance studies, computer-aided 3-D modeling, computational fluid dynamic analysis, and the prototype testing. The main advantages of this energy-saving regenerative system include: higher performance efficiency due to less frictional force, simplified mechanical system, less vibration due to its symmetrical structure design, less frictional losses between free piston and cylinder, and cost-saving in mechanism due to low tolerance requirement manufacturing of the system components.","PeriodicalId":383435,"journal":{"name":"Journal of Mechanical Engineering and Automation","volume":"34 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132603966","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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