Machined surface improvement of CFRP routing process using cryogenic cooling method

Tae Gon Kim, Kangwoo Shin, Hyo Young Kim, Seok Woo Lee, Gyuho Kim, Byung Kwon Min

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Carbon fiber reinforced plastic (CFRP) has been widely used to build aerospace parts due to light weight and high stiffness. CFRP plate is formed by a multilayer stack which consists of highly brittle carbon fiber and polymer matrix having different material properties with respect to the temperature. After the forming process, additional routing process is performed to obtain the designed part with better geometric accuracy and surface quality. In the CFRP routing process, surface defects, such as fiber pullout and delamination, are affected by the process temperature. This is due to the temperature-sensitive properties of the polymer matrix. Moreover, bending of carbon fiber changes due to the stiffness of the carbon fiber that is modified with temperature. Therefore, machining temperature should be investigated to reduce the defects during the CFRP routing process. In this study, a routing-machined surface was analyzed with respect to the spray pressure of the liquid nitrogen which can change the machining temperature. Various coolant pressures were applied. As a result, the surface roughness of cutting surface was studied and compared to that of the conventional dry machining. Moreover, cooling pressure was proposed to improve the surface quality of the CFRP routing process.

Original languageEnglish
Title of host publicationEuropean Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019
EditorsRichard K. Leach, D. Billington, C. Nisbet, D. Phillips
Publishereuspen
Pages456-457
Number of pages2
ISBN (Electronic)9780995775145
Publication statusPublished - 2019 Jan 1
Event19th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2019 - Bilbao, Spain
Duration: 2019 Jun 32019 Jun 7

Publication series

NameEuropean Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019

Conference

Conference19th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2019
CountrySpain
CityBilbao
Period19/6/319/6/7

Fingerprint

cryogenic cooling
carbon fiber reinforced plastics
Carbon fiber reinforced plastics
Cryogenics
Cooling
carbon fibers
machining
Carbon fibers
Machining
Polymer matrix
Temperature
Surface properties
temperature
stiffness
fiber pullout
geometric accuracy
plastic plates
Stiffness
Surface defects
polymers

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Materials Science(all)
  • Industrial and Manufacturing Engineering
  • Instrumentation
  • Environmental Engineering

Cite this

Kim, T. G., Shin, K., Kim, H. Y., Lee, S. W., Kim, G., & Min, B. K. (2019). Machined surface improvement of CFRP routing process using cryogenic cooling method. In R. K. Leach, D. Billington, C. Nisbet, & D. Phillips (Eds.), European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019 (pp. 456-457). (European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019). euspen.
Kim, Tae Gon ; Shin, Kangwoo ; Kim, Hyo Young ; Lee, Seok Woo ; Kim, Gyuho ; Min, Byung Kwon. / Machined surface improvement of CFRP routing process using cryogenic cooling method. European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019. editor / Richard K. Leach ; D. Billington ; C. Nisbet ; D. Phillips. euspen, 2019. pp. 456-457 (European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019).
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Kim, TG, Shin, K, Kim, HY, Lee, SW, Kim, G & Min, BK 2019, Machined surface improvement of CFRP routing process using cryogenic cooling method. in RK Leach, D Billington, C Nisbet & D Phillips (eds), European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019. European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019, euspen, pp. 456-457, 19th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2019, Bilbao, Spain, 19/6/3.

Machined surface improvement of CFRP routing process using cryogenic cooling method. / Kim, Tae Gon; Shin, Kangwoo; Kim, Hyo Young; Lee, Seok Woo; Kim, Gyuho; Min, Byung Kwon.

European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019. ed. / Richard K. Leach; D. Billington; C. Nisbet; D. Phillips. euspen, 2019. p. 456-457 (European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - Carbon fiber reinforced plastic (CFRP) has been widely used to build aerospace parts due to light weight and high stiffness. CFRP plate is formed by a multilayer stack which consists of highly brittle carbon fiber and polymer matrix having different material properties with respect to the temperature. After the forming process, additional routing process is performed to obtain the designed part with better geometric accuracy and surface quality. In the CFRP routing process, surface defects, such as fiber pullout and delamination, are affected by the process temperature. This is due to the temperature-sensitive properties of the polymer matrix. Moreover, bending of carbon fiber changes due to the stiffness of the carbon fiber that is modified with temperature. Therefore, machining temperature should be investigated to reduce the defects during the CFRP routing process. In this study, a routing-machined surface was analyzed with respect to the spray pressure of the liquid nitrogen which can change the machining temperature. Various coolant pressures were applied. As a result, the surface roughness of cutting surface was studied and compared to that of the conventional dry machining. Moreover, cooling pressure was proposed to improve the surface quality of the CFRP routing process.

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Kim TG, Shin K, Kim HY, Lee SW, Kim G, Min BK. Machined surface improvement of CFRP routing process using cryogenic cooling method. In Leach RK, Billington D, Nisbet C, Phillips D, editors, European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019. euspen. 2019. p. 456-457. (European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019).