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Research Papers

Improved Mechanical Properties of Fused Deposition Modeling-Manufactured Parts Through Build Parameter Modifications

[+] Author and Article Information
Mohammad Shojib Hossain

W.M. Keck Center for 3D Innovation,
Department of Mechanical Engineering,
The University of Texas at El Paso,
500 W. University Avenue,
El Paso, TX 79968
e-mail: mshossain@miners.utep.edu

David Espalin

W.M. Keck Center for 3D Innovation,
Department of Mechanical Engineering,
The University of Texas at El Paso,
500 W. University Avenue,
El Paso, TX 79968
e-mail: despalin@utep.edu

Jorge Ramos

W.M. Keck Center for 3D Innovation,
Department of Mechanical Engineering,
The University of Texas at El Paso,
500 W. University Avenue,
El Paso, TX 79968
e-mail: jramos16@miners.utep.edu

Mireya Perez

W.M. Keck Center for 3D Innovation,
Department of Mechanical Engineering,
The University of Texas at El Paso,
500 W. University Avenue,
El Paso, TX 79968
e-mail: maperez4@utep.edu

Ryan Wicker

W.M. Keck Center for 3D Innovation,
Department of Mechanical Engineering,
The University of Texas at El Paso,
500 W. University Avenue,
El Paso, TX 79968
e-mail: rwicker@utep.edu

1Corresponding author.

Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received March 11, 2014; final manuscript received September 2, 2014; published online October 24, 2014. Assoc. Editor: David L. Bourell.

J. Manuf. Sci. Eng 136(6), 061002 (Oct 24, 2014) (12 pages) Paper No: MANU-14-1102; doi: 10.1115/1.4028538 History: Received March 11, 2014; Revised September 02, 2014

Today, the use of material extrusion processes, like fused deposition modeling (FDM), in aerospace, biomedical science, and other industries, is gaining popularity because of the access to production-grade thermoplastic polymer materials. This paper focuses on how modifying process parameters such as build orientation, raster angle (RA), contour width (CW), raster width (RW), and raster-to-raster air gap (RRAG) can improve ultimate tensile strength (UTS), Young's modulus, and tensile strain. This was assessed using three methods: default, Insight revision, and visual feedback. On average, parameter modification through the visual feedback method improved UTS in all orientations, 16% in XYZ, 7% in XZY, and 22% in ZXY.

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References

Figures

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Fig. 1

Schematic diagram of FDM machine

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Fig. 2

Build orientations used for the fabrication of ASTM D638 type I specimens. The XYZ, XZY, ZXY terminology is based on ASTM F2921-11.

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Fig. 3

FDM building parameters

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Fig. 4

XY plane containing rendered toolpaths generated by insight (left) and actual deposited material (right) for the XYZ orientation using a 0 deg/90 deg RA; (a) and (b) default parameters (CW 0.508 mm, RW 0.508 mm, RRAG 0 mm), (c) and (d) insight revision method parameters (CW 0.432 mm, RW 0.432 mm, RRAG 0 mm)

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Fig. 5

XY plane containing rendered toolpaths generated by insight (left) and actual deposited material (right) for the XZY orientation using a 0 deg/90 deg RA; (a) and (b) default parameters (CW 0.508 mm, RW 0.508 mm, RRAG 0 mm), (c) and (d) insight revision method parameters (CW 0.508 mm, RW 0.483 mm, RRAG 0 mm)

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Fig. 6

XY plane containing rendered toolpaths generated by insight (left) and actual deposited material (right) for the ZXY orientation using a 0 deg/90 deg RA; (a) and (b) default parameters (CW 0.508 mm, RW 0.508 mm, RRAG 0 mm), (c) and (d) insight revision method parameters (CW 0.559 mm, RW 0.457 mm, RRAG 0 mm)

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Fig. 7

Optical images in XY building plane of specimens built in the XYZ orientation with airs gaps highlighted by black circles (parameters are set in mm)

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Fig. 8

Optical images in XY building plane of specimens built in the XZY orientation with airs gaps highlighted by black circles (parameters are set in mm)

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Fig. 9

Optical images in XY building plane of specimens built in the ZXY orientation with airs gaps highlighted by black circles (parameters are set in mm)

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Fig. 10

UTS for (a) XYZ build orientation, (b) XZY build orientation, and (c) ZXY build orientation. Each bar represents the average of at least five specimens and the error bars are ± standard deviation.

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Fig. 11

Young's modulus for (a) XYZ build orientation, (b) XZY build orientation, and (c) ZXY build orientation. Each bar represents the average of at least five specimens and the error bars are ± standard deviation.

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Fig. 12

Tensile strain for (a) XYZ build orientation, (b) XZY build orientation, and (c) ZXY build orientation. Each bar represents the average of at least five specimens and the error bars are ± standard deviation.

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Fig. 13

Building parameter dependency on model dimension. Same building parameter used in two different models, (a) no gap observed in a 8.1 mm by 8.1 mm layer and (b) gap observed highlighted by black circles in a 10.4 mm by 10.4 mm layer.

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