Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
권호 표지
DOI QR코드

DOI QR Code

Strength Analysis of Rear Upright Laminated with Carbon Fiber Composite for Leisure Purposed Small Electric Car

카본섬유 복합재 라미네이트를 적용한 레저용 소형 전기차량의 후륜 업라이트의 구조강도 해석

  • Jang, Woongeun (Division. of Mechanical Engineering Technology, Yeungnam University College)
  • 장운근 (영남이공대학교 기계계열)
  • Received : 2019.02.25
  • Accepted : 2019.05.08
  • Published : 2019.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

Carbon fiber composite laminate has been widely used in the area of sports applications such as race car, golf club, fishing rods, yacht. In this study, carbon fiber composite laminate was used in the rear upright of leisure purposed small size single-seat electric race car to reduce its unsprung mass of suspension system. The focus of this research is to investigate in finding optimal stacking lay-up of rear upright laminated with carbon fiber composite in the early design phase. Forces transferred from circuit road to rear upright were estimated through MBD(Multi-Body Dynamics)model of the rear suspension geometry. To evaluate the strength of the rear upright laminated with carbon fiber composite which generally behaves in an anisotropic or orthotropic manner, FEA(Finite Element Analysis) model suitable for composite materials was built followed by its strength was evaluated depending on different stacking lay-up. The result showed that Symmetric stacking lay-up [$45^{\circ}/-45^{\circ}/90^{\circ}/0^{\circ}$]s for frontal area and symmetric stacking lay-up with 1mm aluminum core [$45^{\circ}/-45^{\circ}/90^{\circ}/Core$]s for rear area were most suitable of 16 lay-up cases from the side of both strength based on Tasi-wu failure index and weight.

Keywords

SOOOB6_2019_v22n3_273_f0001.png 이미지

Fig. 1 Rear suspension & applied forces from road

SOOOB6_2019_v22n3_273_f0002.png 이미지

Fig. 3 Comparison of analysis results : Tsai-Wu failure index values

SOOOB6_2019_v22n3_273_f0003.png 이미지

Fig. 4 Results : Tsai-Wu failure index values of case1

SOOOB6_2019_v22n3_273_f0004.png 이미지

Fig. 5 Results : Tsai-Wu failure index values of case12

SOOOB6_2019_v22n3_273_f0005.png 이미지

Fig. 7 Results : Tsai-Wu failure index values of case7

SOOOB6_2019_v22n3_273_f0006.png 이미지

Fig. 2 (a) Frontal view (b)Rear view of FEA model & boundary condition

SOOOB6_2019_v22n3_273_f0007.png 이미지

Fig. 6 (a) Stacking sequences of frontal area of case7

SOOOB6_2019_v22n3_273_f0008.png 이미지

Fig. 6 (b) Stacking sequences of rear area of case7

Table 1. Applied forces to upright

SOOOB6_2019_v22n3_273_t0001.png 이미지

Table 2. CFRP Laminate material properties

SOOOB6_2019_v22n3_273_t0002.png 이미지

Table 3. Front & hub lay-up cases

SOOOB6_2019_v22n3_273_t0003.png 이미지

Table 4. Analysis results

SOOOB6_2019_v22n3_273_t0004.png 이미지

References

  1. LGERI 리포트, "전기자동차가 몰고 올 변화의 물결" http://www.lgeri.com/uploadFiles/ko/pdf/pub/LGBI1068-02_20091123083706.pdf
  2. S. H. Cha1,B. S. So1, K. S. Oh, W. H. Choi, "Study on a Resin Impregnation of RTM to Manufacture Battery Case with CFRP," Proceedings of the KSMPE Spring Conference 2016, pp. 144-144, (2016).
  3. G. D. Lee, H. J. Jeong, J. H. Kim, S. W. Jeong, H. Kwon, I. J. Kwon, "Analysis of Stiffness Characteristics on CFRP Lower Arm," Proceedings of the KSMPE Spring Conference 2016, pp. 403-403, (2016).
  4. Jin Ah Lee, Hyoung Taek Hong, Heung Jae Chun, "Strength Design of Lightweight Composite Bicycle Frame," Transactions of the Korean Society of Mechanical Engineers - A 37(2), pp. 265-270, (2013) https://doi.org/10.3795/KSME-A.2013.37.2.265
  5. Sung-Tag Seo, "The Fundamental Study of Strength on the CFRP Pipe Reinforced Rib," J. Korean Society of Industrial Application, vol.13, No.1, 41-47, Feb, (2010)
  6. S. Heimbs, F. Strobl, P. Middendorf, S. Gardner, B. Eddington, J. Key "Crash Simulation of an F1 Racing Car Front Impact Structure," 7th European LS-DYNA Users Conference, Salzburg, Austria, (2009)
  7. Krishan K. Chawla, "Composite Materials : Science and Engineering, 2nd Edition, pp398-400, Springer-Verlag, (1998)