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Development and Evaluation of Modeling Approaches for Extrusion-Based Additive Manufacturing of Thermoplastics.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Development and Evaluation of Modeling Approaches for Extrusion-Based Additive Manufacturing of Thermoplastics./
作者:	Bock, Christopher C.
面頁冊數:	1 online resource (156 pages)
附註:	Source: Masters Abstracts International, Volume: 84-04.
Contained By:	Masters Abstracts International84-04.
標題:	Heat transfer. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29330434click for full text (PQDT)
ISBN:	9798351492476

Development and Evaluation of Modeling Approaches for Extrusion-Based Additive Manufacturing of Thermoplastics.
Bock, Christopher C.

Development and Evaluation of Modeling Approaches for Extrusion-Based Additive Manufacturing of Thermoplastics. - 1 online resource (156 pages)

Source: Masters Abstracts International, Volume: 84-04.

Thesis (M.Sc.)--The University of Maine, 2022.

Includes bibliographical references

This work focuses on evaluating different modeling approaches and model parameters for thermoplastic AM, with the goal of informing more efficient and effective modeling approaches. First, different modeling approaches were tested and compared to experiments. From this it was found that all three of the modeling approaches provide comparable results and provide similar results to experiments. Then one of the modeling approaches was tested on large scale geometries, and it was found that the model results matched experiments closely. Then the effect of different material properties was evaluated, this was done by performing a fractional factorial design of experiments where the factors were ±15% of the baseline material properties. From this it was found that coefficient of thermal expansion (CTE) is by far the most important material property for the simulated warpage. This test was repeated with a simulated desktop printer, simulated commercial printer and a simulated room scaled printer to evaluate if the relevant material properties change as a function of length scale; it was found that as length scale increases, conduction becomes increasingly important, but this effect was still small compared to that of CTE. Finally, the effect of the environment was evaluated by running a Latin hypercube Design of Experiments (DOE) over environmental factors; it was found that the most important effects are the bed and enclosure temperatures. It also pointed to the feasibility of using radiative heating to mitigate warpage, because as length scale increases natural convection becomes less important.This work is significant because it leverages modeling and simulation to evaluate the effects of the different phenomena in 3D printing and points out some of the gaps in the current state of the art that are not evident from performing simple experiments or simple simulations, namely implementing a model for build plate adhesion.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798351492476Subjects--Topical Terms:

3391367
Heat transfer.
Index Terms--Genre/Form:

542853
Electronic books.

Development and Evaluation of Modeling Approaches for Extrusion-Based Additive Manufacturing of Thermoplastics.
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502 $a Thesis (M.Sc.)--The University of Maine, 2022.
504 $a Includes bibliographical references
520 $a This work focuses on evaluating different modeling approaches and model parameters for thermoplastic AM, with the goal of informing more efficient and effective modeling approaches. First, different modeling approaches were tested and compared to experiments. From this it was found that all three of the modeling approaches provide comparable results and provide similar results to experiments. Then one of the modeling approaches was tested on large scale geometries, and it was found that the model results matched experiments closely. Then the effect of different material properties was evaluated, this was done by performing a fractional factorial design of experiments where the factors were ±15% of the baseline material properties. From this it was found that coefficient of thermal expansion (CTE) is by far the most important material property for the simulated warpage. This test was repeated with a simulated desktop printer, simulated commercial printer and a simulated room scaled printer to evaluate if the relevant material properties change as a function of length scale; it was found that as length scale increases, conduction becomes increasingly important, but this effect was still small compared to that of CTE. Finally, the effect of the environment was evaluated by running a Latin hypercube Design of Experiments (DOE) over environmental factors; it was found that the most important effects are the bed and enclosure temperatures. It also pointed to the feasibility of using radiative heating to mitigate warpage, because as length scale increases natural convection becomes less important.This work is significant because it leverages modeling and simulation to evaluate the effects of the different phenomena in 3D printing and points out some of the gaps in the current state of the art that are not evident from performing simple experiments or simple simulations, namely implementing a model for build plate adhesion.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Heat transfer. $3 3391367
650 4 $a Polymers. $3 535398
650 4 $a Polyethylene terephthalate. $3 1636477
650 4 $a Nozzle geometry. $3 3681836
650 4 $a Residual stress. $3 3686079
650 4 $a Yield stress. $3 3561163
650 4 $a Finite element analysis. $3 3554062
650 4 $a Printers. $3 1281380
650 4 $a Boundary conditions. $3 3560411
650 4 $a Radiation. $3 673904
650 4 $a Carbon fiber reinforcement. $3 3681400
650 4 $a Industrial engineering. $3 526216
650 4 $a Mathematics. $3 515831
650 4 $a Plastics. $3 649803
650 4 $a Polymer chemistry. $3 3173488
650 4 $a Thermodynamics. $3 517304
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773 0 $t Masters Abstracts International $g 84-04.
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