The Experts below are selected from a list of 792 Experts worldwide ranked by ideXlab platform
Thomas H Hahn - One of the best experts on this subject based on the ideXlab platform.
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characterization of the Laminated Object Manufacturing lom process
Rapid Prototyping Journal, 2000Co-Authors: Joon Park, Michael J. Tari, Thomas H HahnAbstract:Laminated Object Manufacturing (LOM) is a rapid prototyping process where a part is built sequentially from layers of paper. Studied in the present paper are the precision and accuracy of the LOM process and the dimensional stability of LOM parts. The process was found to exhibit both constant and random sources of error in the part dimensions. The dimensional error was the largest normal to the plane of the paper, exacerbated by the moisture absorption and subsequent swelling. The key process parameters were identified and optimized for sufficient bonding and cutting accuracy.
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thermomechanical analysis of the Laminated Object Manufacturing lom process
Rapid Prototyping Journal, 1998Co-Authors: Fazil O Sonmez, Thomas H HahnAbstract:LOM is one of the techniques for rapid prototyping, which is used to build three‐dimensional solid Objects. In this paper, a numerical analysis of the thermomechanical behavior of a laminate during the LOM process is presented. Models were developed to describe heat transfer and deformation phenomena. These models are incorporated into computer codes to generate numerical results. The numerical results show how the process parameters (e.g. roller temperature, velocity, indentation) are related to temperature and stress distributions within the laminate. By using this code, process conditions which are favorable to bonding are identified.
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rapid prototyping of composite parts using resin transfer molding and Laminated Object Manufacturing
Composites Part A-applied Science and Manufacturing, 1998Co-Authors: Michael J. Tari, Andre Bals, Joon Park, Thomas H HahnAbstract:An expensive and time consuming aspect of a product development cycle is Manufacturing the prototype of the design concept. The goal of current research is to devise a methodology for the rapid process development of resin transfer molding (RTM) in order to reduce product development cycle time and lower the cost of developing composite parts. As a first step towards this goal the feasibility of an alternative rapid prototyping technique, namely Laminated Object Manufacturing (LOM), to fabricate molds has been investigated. The durability and dimensional stability of such a mold, as well as its economic practicality in the RTM Manufacturing of a composite I-beam were considered. To keep tooling and fixturing simple, vacuum pressure was used to draw resin into the mold. However, injection at this low pressure proved difficult. To remedy the situation a high permeability layer (HPL) was incorporated into the process. The benefits and drawbacks of utilizing such a layer are also discussed in the paper. Furthermore, an RTM simulation program developed at UCLA was employed to determine optimum gate locations. Finally, the total hours to manufacture the first acceptable part were quantified for comparison with future studies.
Michael J. Tari - One of the best experts on this subject based on the ideXlab platform.
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characterization of the Laminated Object Manufacturing lom process
Rapid Prototyping Journal, 2000Co-Authors: Joon Park, Michael J. Tari, Thomas H HahnAbstract:Laminated Object Manufacturing (LOM) is a rapid prototyping process where a part is built sequentially from layers of paper. Studied in the present paper are the precision and accuracy of the LOM process and the dimensional stability of LOM parts. The process was found to exhibit both constant and random sources of error in the part dimensions. The dimensional error was the largest normal to the plane of the paper, exacerbated by the moisture absorption and subsequent swelling. The key process parameters were identified and optimized for sufficient bonding and cutting accuracy.
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Rapid prototyping of composite parts using resin transfer molding and Laminated Object Manufacturing
Composites Part A: Applied Science and Manufacturing, 1998Co-Authors: Michael J. Tari, Mark Y. Lin, Andre Bals, Joon Park, H. Thomas HahnAbstract:An expensive and time consuming aspect of a product development cycle is Manufacturing the prototype of the design concept. The goal of current research is to devise a methodology for the rapid process development of resin transfer molding (RTM) in order to reduce product development cycle time and lower the cost of developing composite parts. As a first step towards this goal the feasibility of an alternative rapid prototyping technique, namely Laminated Object Manufacturing (LOM), to fabricate molds has been investigated. The durability and dimensional stability of such a mold, as well as its economic practicality in the RTM Manufacturing of a composite I-beam were considered. To keep tooling and fixturing simple, vacuum pressure was used to draw resin into the mold. However, injection at this low pressure proved difficult. To remedy the situation a high permeability layer (HPL) was incorporated into the process. The benefits and drawbacks of utilizing such a layer are also discussed in the paper. Furthermore, an RTM simulation program developed at UCLA was employed to determine optimum gate locations. Finally, the total hours to manufacture the first acceptable part were quantified for comparison with future studies. © 1998 Elsevier Science Limited. All rights reserved.
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rapid prototyping of composite parts using resin transfer molding and Laminated Object Manufacturing
Composites Part A-applied Science and Manufacturing, 1998Co-Authors: Michael J. Tari, Andre Bals, Joon Park, Thomas H HahnAbstract:An expensive and time consuming aspect of a product development cycle is Manufacturing the prototype of the design concept. The goal of current research is to devise a methodology for the rapid process development of resin transfer molding (RTM) in order to reduce product development cycle time and lower the cost of developing composite parts. As a first step towards this goal the feasibility of an alternative rapid prototyping technique, namely Laminated Object Manufacturing (LOM), to fabricate molds has been investigated. The durability and dimensional stability of such a mold, as well as its economic practicality in the RTM Manufacturing of a composite I-beam were considered. To keep tooling and fixturing simple, vacuum pressure was used to draw resin into the mold. However, injection at this low pressure proved difficult. To remedy the situation a high permeability layer (HPL) was incorporated into the process. The benefits and drawbacks of utilizing such a layer are also discussed in the paper. Furthermore, an RTM simulation program developed at UCLA was employed to determine optimum gate locations. Finally, the total hours to manufacture the first acceptable part were quantified for comparison with future studies.
Joon Park - One of the best experts on this subject based on the ideXlab platform.
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characterization of the Laminated Object Manufacturing lom process
Rapid Prototyping Journal, 2000Co-Authors: Joon Park, Michael J. Tari, Thomas H HahnAbstract:Laminated Object Manufacturing (LOM) is a rapid prototyping process where a part is built sequentially from layers of paper. Studied in the present paper are the precision and accuracy of the LOM process and the dimensional stability of LOM parts. The process was found to exhibit both constant and random sources of error in the part dimensions. The dimensional error was the largest normal to the plane of the paper, exacerbated by the moisture absorption and subsequent swelling. The key process parameters were identified and optimized for sufficient bonding and cutting accuracy.
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Rapid prototyping of composite parts using resin transfer molding and Laminated Object Manufacturing
Composites Part A: Applied Science and Manufacturing, 1998Co-Authors: Michael J. Tari, Mark Y. Lin, Andre Bals, Joon Park, H. Thomas HahnAbstract:An expensive and time consuming aspect of a product development cycle is Manufacturing the prototype of the design concept. The goal of current research is to devise a methodology for the rapid process development of resin transfer molding (RTM) in order to reduce product development cycle time and lower the cost of developing composite parts. As a first step towards this goal the feasibility of an alternative rapid prototyping technique, namely Laminated Object Manufacturing (LOM), to fabricate molds has been investigated. The durability and dimensional stability of such a mold, as well as its economic practicality in the RTM Manufacturing of a composite I-beam were considered. To keep tooling and fixturing simple, vacuum pressure was used to draw resin into the mold. However, injection at this low pressure proved difficult. To remedy the situation a high permeability layer (HPL) was incorporated into the process. The benefits and drawbacks of utilizing such a layer are also discussed in the paper. Furthermore, an RTM simulation program developed at UCLA was employed to determine optimum gate locations. Finally, the total hours to manufacture the first acceptable part were quantified for comparison with future studies. © 1998 Elsevier Science Limited. All rights reserved.
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rapid prototyping of composite parts using resin transfer molding and Laminated Object Manufacturing
Composites Part A-applied Science and Manufacturing, 1998Co-Authors: Michael J. Tari, Andre Bals, Joon Park, Thomas H HahnAbstract:An expensive and time consuming aspect of a product development cycle is Manufacturing the prototype of the design concept. The goal of current research is to devise a methodology for the rapid process development of resin transfer molding (RTM) in order to reduce product development cycle time and lower the cost of developing composite parts. As a first step towards this goal the feasibility of an alternative rapid prototyping technique, namely Laminated Object Manufacturing (LOM), to fabricate molds has been investigated. The durability and dimensional stability of such a mold, as well as its economic practicality in the RTM Manufacturing of a composite I-beam were considered. To keep tooling and fixturing simple, vacuum pressure was used to draw resin into the mold. However, injection at this low pressure proved difficult. To remedy the situation a high permeability layer (HPL) was incorporated into the process. The benefits and drawbacks of utilizing such a layer are also discussed in the paper. Furthermore, an RTM simulation program developed at UCLA was employed to determine optimum gate locations. Finally, the total hours to manufacture the first acceptable part were quantified for comparison with future studies.
H. Thomas Hahn - One of the best experts on this subject based on the ideXlab platform.
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Composite Material Based Laminated Object Manufacturing (LOM) Process Simulation
Advanced Composites Letters, 2001Co-Authors: Joohyuk Park, Moon K. Kang, H. Thomas HahnAbstract:In Laminated Object Manufacturing process (LOM) as a rapid Manufacturing technique, the key process parameters for achieving a successful prototype are the roller temperature, the roller speed, the...
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Rapid prototyping of composite parts using resin transfer molding and Laminated Object Manufacturing
Composites Part A: Applied Science and Manufacturing, 1998Co-Authors: Michael J. Tari, Mark Y. Lin, Andre Bals, Joon Park, H. Thomas HahnAbstract:An expensive and time consuming aspect of a product development cycle is Manufacturing the prototype of the design concept. The goal of current research is to devise a methodology for the rapid process development of resin transfer molding (RTM) in order to reduce product development cycle time and lower the cost of developing composite parts. As a first step towards this goal the feasibility of an alternative rapid prototyping technique, namely Laminated Object Manufacturing (LOM), to fabricate molds has been investigated. The durability and dimensional stability of such a mold, as well as its economic practicality in the RTM Manufacturing of a composite I-beam were considered. To keep tooling and fixturing simple, vacuum pressure was used to draw resin into the mold. However, injection at this low pressure proved difficult. To remedy the situation a high permeability layer (HPL) was incorporated into the process. The benefits and drawbacks of utilizing such a layer are also discussed in the paper. Furthermore, an RTM simulation program developed at UCLA was employed to determine optimum gate locations. Finally, the total hours to manufacture the first acceptable part were quantified for comparison with future studies. © 1998 Elsevier Science Limited. All rights reserved.
Andre Bals - One of the best experts on this subject based on the ideXlab platform.
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Rapid prototyping of composite parts using resin transfer molding and Laminated Object Manufacturing
Composites Part A: Applied Science and Manufacturing, 1998Co-Authors: Michael J. Tari, Mark Y. Lin, Andre Bals, Joon Park, H. Thomas HahnAbstract:An expensive and time consuming aspect of a product development cycle is Manufacturing the prototype of the design concept. The goal of current research is to devise a methodology for the rapid process development of resin transfer molding (RTM) in order to reduce product development cycle time and lower the cost of developing composite parts. As a first step towards this goal the feasibility of an alternative rapid prototyping technique, namely Laminated Object Manufacturing (LOM), to fabricate molds has been investigated. The durability and dimensional stability of such a mold, as well as its economic practicality in the RTM Manufacturing of a composite I-beam were considered. To keep tooling and fixturing simple, vacuum pressure was used to draw resin into the mold. However, injection at this low pressure proved difficult. To remedy the situation a high permeability layer (HPL) was incorporated into the process. The benefits and drawbacks of utilizing such a layer are also discussed in the paper. Furthermore, an RTM simulation program developed at UCLA was employed to determine optimum gate locations. Finally, the total hours to manufacture the first acceptable part were quantified for comparison with future studies. © 1998 Elsevier Science Limited. All rights reserved.
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rapid prototyping of composite parts using resin transfer molding and Laminated Object Manufacturing
Composites Part A-applied Science and Manufacturing, 1998Co-Authors: Michael J. Tari, Andre Bals, Joon Park, Thomas H HahnAbstract:An expensive and time consuming aspect of a product development cycle is Manufacturing the prototype of the design concept. The goal of current research is to devise a methodology for the rapid process development of resin transfer molding (RTM) in order to reduce product development cycle time and lower the cost of developing composite parts. As a first step towards this goal the feasibility of an alternative rapid prototyping technique, namely Laminated Object Manufacturing (LOM), to fabricate molds has been investigated. The durability and dimensional stability of such a mold, as well as its economic practicality in the RTM Manufacturing of a composite I-beam were considered. To keep tooling and fixturing simple, vacuum pressure was used to draw resin into the mold. However, injection at this low pressure proved difficult. To remedy the situation a high permeability layer (HPL) was incorporated into the process. The benefits and drawbacks of utilizing such a layer are also discussed in the paper. Furthermore, an RTM simulation program developed at UCLA was employed to determine optimum gate locations. Finally, the total hours to manufacture the first acceptable part were quantified for comparison with future studies.
