Machining of FRP composite laminates with CD and UAD techniques: a comparative and experimental investigation

Sikiru Oluwarotimi  Ismail; Hom Dhakal; Anish  Roy; Xiang-Dong Wang; Ivan Popov

Machining of FRP composite laminates with CD and UAD techniques: a comparative and experimental investigation

Sikiru Oluwarotimi Ismail, Hom Dhakal, Anish Roy, Xiang-Dong Wang, Ivan Popov

Nanjing Institute of Geology and Paleontology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The enhanced properties and increased application of a natural hemp fibrereinforced polymer (HFRP) composites have emphasized the need for an innovative and a deeper understanding of their machinability in order to further improve their functionality and applicability. Hence, this paper presents a comparative and experimental investigation of the effects of a dry conventional drilling (CD) and hybrid ultrasonically-assisted drilling (UAD) techniques on both hemp fibrereinforced/polycaprolactone and vinyl ester (HF/PCL and HF/VE) composite samples. The results obtained depict that HF/PCL composite sample of 19 aspect ratio (AR) has a minimum values of peak thrust force of 90N and 75N during UAD and CD respectively, with the lowest machining time of 30seconds for both techniques, among other ARs. These values produced an optimum drilling and best quality drilled holes, in terms of lowest thrust force and resultant drilling-induced damage. It is observed that there was a very little or no thrust force reduction between UAD and CD when drilling the HF/PCL composites. Consequently, PCL was replaced with VE, to produce another sample of HF/VE composites. Therefore, a substantial reduction in drilling forces (thrust force and torque) was obtained during HF/VE drilling, using UAD technique, when compared with the dry CD technique. Comparatively, the percentage of the forces reduction is approximately 70. The quality of the drilled sample depended on these primary forces. In addition, a significant lower ply delamination defect, burr formation, fibre-uncut/pull-out and surface roughness were observed, as well as an improved chip expulsion, hole roundness, material removal rate and surface finish (hole quality) were obtained with UAD, when compared with CD technique. Evidently, a non-traditional hybrid machining technique, UAD, has enhanced machinability (drilling) of HF/VE composite compared with the CD and HF/PCL composite samples.

Original language	English
Title of host publication	Proceedings of the American Society for Composites: Thirty-First Technical Conference 2016
Editors	Barry D. Davidson, James G. Ratcliffe, Michael W. Czabaj
Publisher	DEStech Publications
ISBN (Print)	978-1605953168
Publication status	Early online - 26 Sept 2016
Event	American Society for Composites 31st Technical Conference - Williamsburg, Virginia, United States Duration: 19 Sept 2016 → 22 Sept 2016

Conference

Conference	American Society for Composites 31st Technical Conference
Country/Territory	United States
City	Williamsburg, Virginia
Period	19/09/16 → 22/09/16

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Ismail, S. O., Dhakal, H., Roy, A., Wang, X.-D., & Popov, I. (2016). Machining of FRP composite laminates with CD and UAD techniques: a comparative and experimental investigation. In B. D. Davidson, J. G. Ratcliffe, & M. W. Czabaj (Eds.), Proceedings of the American Society for Composites: Thirty-First Technical Conference 2016 DEStech Publications. Advance online publication. http://dpi-proceedings.com/index.php/asc31/article/view/3168

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title = "Machining of FRP composite laminates with CD and UAD techniques: a comparative and experimental investigation",

abstract = "The enhanced properties and increased application of a natural hemp fibrereinforced polymer (HFRP) composites have emphasized the need for an innovative and a deeper understanding of their machinability in order to further improve their functionality and applicability. Hence, this paper presents a comparative and experimental investigation of the effects of a dry conventional drilling (CD) and hybrid ultrasonically-assisted drilling (UAD) techniques on both hemp fibrereinforced/polycaprolactone and vinyl ester (HF/PCL and HF/VE) composite samples. The results obtained depict that HF/PCL composite sample of 19 aspect ratio (AR) has a minimum values of peak thrust force of 90N and 75N during UAD and CD respectively, with the lowest machining time of 30seconds for both techniques, among other ARs. These values produced an optimum drilling and best quality drilled holes, in terms of lowest thrust force and resultant drilling-induced damage. It is observed that there was a very little or no thrust force reduction between UAD and CD when drilling the HF/PCL composites. Consequently, PCL was replaced with VE, to produce another sample of HF/VE composites. Therefore, a substantial reduction in drilling forces (thrust force and torque) was obtained during HF/VE drilling, using UAD technique, when compared with the dry CD technique. Comparatively, the percentage of the forces reduction is approximately 70. The quality of the drilled sample depended on these primary forces. In addition, a significant lower ply delamination defect, burr formation, fibre-uncut/pull-out and surface roughness were observed, as well as an improved chip expulsion, hole roundness, material removal rate and surface finish (hole quality) were obtained with UAD, when compared with CD technique. Evidently, a non-traditional hybrid machining technique, UAD, has enhanced machinability (drilling) of HF/VE composite compared with the CD and HF/PCL composite samples.",

author = "Ismail, {Sikiru Oluwarotimi} and Hom Dhakal and Anish Roy and Xiang-Dong Wang and Ivan Popov",

year = "2016",

month = sep,

day = "26",

language = "English",

isbn = "978-1605953168",

editor = "Davidson, {Barry D.} and Ratcliffe, {James G.} and Czabaj, {Michael W.}",

booktitle = "Proceedings of the American Society for Composites: Thirty-First Technical Conference 2016",

publisher = "DEStech Publications",

note = "American Society for Composites 31st Technical Conference ; Conference date: 19-09-2016 Through 22-09-2016",

}

Ismail, SO, Dhakal, H, Roy, A, Wang, X-D & Popov, I 2016, Machining of FRP composite laminates with CD and UAD techniques: a comparative and experimental investigation. in BD Davidson, JG Ratcliffe & MW Czabaj (eds), Proceedings of the American Society for Composites: Thirty-First Technical Conference 2016. DEStech Publications, American Society for Composites 31st Technical Conference, Williamsburg, Virginia, United States, 19/09/16. <http://dpi-proceedings.com/index.php/asc31/article/view/3168>

Machining of FRP composite laminates with CD and UAD techniques: a comparative and experimental investigation. / Ismail, Sikiru Oluwarotimi ; Dhakal, Hom; Roy, Anish et al.
Proceedings of the American Society for Composites: Thirty-First Technical Conference 2016. ed. / Barry D. Davidson; James G. Ratcliffe; Michael W. Czabaj. DEStech Publications, 2016.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Machining of FRP composite laminates with CD and UAD techniques: a comparative and experimental investigation

AU - Ismail, Sikiru Oluwarotimi

AU - Dhakal, Hom

AU - Roy, Anish

AU - Wang, Xiang-Dong

AU - Popov, Ivan

PY - 2016/9/26

Y1 - 2016/9/26

N2 - The enhanced properties and increased application of a natural hemp fibrereinforced polymer (HFRP) composites have emphasized the need for an innovative and a deeper understanding of their machinability in order to further improve their functionality and applicability. Hence, this paper presents a comparative and experimental investigation of the effects of a dry conventional drilling (CD) and hybrid ultrasonically-assisted drilling (UAD) techniques on both hemp fibrereinforced/polycaprolactone and vinyl ester (HF/PCL and HF/VE) composite samples. The results obtained depict that HF/PCL composite sample of 19 aspect ratio (AR) has a minimum values of peak thrust force of 90N and 75N during UAD and CD respectively, with the lowest machining time of 30seconds for both techniques, among other ARs. These values produced an optimum drilling and best quality drilled holes, in terms of lowest thrust force and resultant drilling-induced damage. It is observed that there was a very little or no thrust force reduction between UAD and CD when drilling the HF/PCL composites. Consequently, PCL was replaced with VE, to produce another sample of HF/VE composites. Therefore, a substantial reduction in drilling forces (thrust force and torque) was obtained during HF/VE drilling, using UAD technique, when compared with the dry CD technique. Comparatively, the percentage of the forces reduction is approximately 70. The quality of the drilled sample depended on these primary forces. In addition, a significant lower ply delamination defect, burr formation, fibre-uncut/pull-out and surface roughness were observed, as well as an improved chip expulsion, hole roundness, material removal rate and surface finish (hole quality) were obtained with UAD, when compared with CD technique. Evidently, a non-traditional hybrid machining technique, UAD, has enhanced machinability (drilling) of HF/VE composite compared with the CD and HF/PCL composite samples.

AB - The enhanced properties and increased application of a natural hemp fibrereinforced polymer (HFRP) composites have emphasized the need for an innovative and a deeper understanding of their machinability in order to further improve their functionality and applicability. Hence, this paper presents a comparative and experimental investigation of the effects of a dry conventional drilling (CD) and hybrid ultrasonically-assisted drilling (UAD) techniques on both hemp fibrereinforced/polycaprolactone and vinyl ester (HF/PCL and HF/VE) composite samples. The results obtained depict that HF/PCL composite sample of 19 aspect ratio (AR) has a minimum values of peak thrust force of 90N and 75N during UAD and CD respectively, with the lowest machining time of 30seconds for both techniques, among other ARs. These values produced an optimum drilling and best quality drilled holes, in terms of lowest thrust force and resultant drilling-induced damage. It is observed that there was a very little or no thrust force reduction between UAD and CD when drilling the HF/PCL composites. Consequently, PCL was replaced with VE, to produce another sample of HF/VE composites. Therefore, a substantial reduction in drilling forces (thrust force and torque) was obtained during HF/VE drilling, using UAD technique, when compared with the dry CD technique. Comparatively, the percentage of the forces reduction is approximately 70. The quality of the drilled sample depended on these primary forces. In addition, a significant lower ply delamination defect, burr formation, fibre-uncut/pull-out and surface roughness were observed, as well as an improved chip expulsion, hole roundness, material removal rate and surface finish (hole quality) were obtained with UAD, when compared with CD technique. Evidently, a non-traditional hybrid machining technique, UAD, has enhanced machinability (drilling) of HF/VE composite compared with the CD and HF/PCL composite samples.

UR - http://dpi-proceedings.com/index.php/asc31/article/view/3168

M3 - Conference contribution

SN - 978-1605953168

BT - Proceedings of the American Society for Composites: Thirty-First Technical Conference 2016

A2 - Davidson, Barry D.

A2 - Ratcliffe, James G.

A2 - Czabaj, Michael W.

PB - DEStech Publications

T2 - American Society for Composites 31st Technical Conference

Y2 - 19 September 2016 through 22 September 2016

ER -

Machining of FRP composite laminates with CD and UAD techniques: a comparative and experimental investigation

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