Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
권호 표지
DOI QR코드

DOI QR Code

Reliability analysis on fatigue Strength for Certification of Aircraft Composite Structures

  • Choi, Cheong Ho (KIAST, Aviation Certification Division, Aviation Certification Department) ;
  • Lee, Doo Jin (KIAST, Aviation Certification Division, Aviation Certification Department) ;
  • Jo, Jae Hyun (KIAST, Aviation Certification Division, Aviation Certification Department) ;
  • Bae, Sung Hwan (KIAST, Aviation Certification Division, Aviation Certification Department) ;
  • Lee, Myung Jik (KIAST, Aviation Certification Division, Aviation Certification Department) ;
  • Lee, Jong Ho (KIAST, Aviation Certification Division, Aviation Certification Department)
  • Received : 2020.09.15
  • Accepted : 2021.03.05
  • Published : 2021.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

Reliability of fatigue strength on Aircraft Composites(GFRP) Structures was assessed in this paper. Fatigue strength of GFRP was used through the existing fatigue test data with Monte Carlo method. The Sa-Nf curve of composites fatigue strength was assumed as normal distribution and reliability was analyzed using SSIT model. Fatigue stress was designed IAW ASTM F3114-15 with special safety factor of Ssf=1.2~2.0. Reliability was calculated by analytic method and FORM. Sensitivity for the effect of mean and standard deviation of fatigue strength as well as fatigue stability was evaluated. This result can be usefully applied to reliability and fatigue design for composite structures of light weight aircraft.

Keywords

Acknowledgement

This work was supported by KIAST(Korea Institute of Aviation Safety Technology) and the writers are grateful for this support.

References

  1. DOT, FAA, AR-99/2, "Probabilistic Design Methodology Composite Aircraft Structures", June, 1999.
  2. DOT, FAA, AR-10/6, "Determination fatigue life of Composites Aircraft Structures Using Life and Load-Enhancement Factors", June, 2011.
  3. Jae hyun Jo, Doo Jin Lee, "A Study on the NDI Process Approval of Wet Lay-up Composite Parts", SASE Fall Conference, Nov. 14-15, 2019.
  4. FAA, Part 23, "Small Airplane Certification Process study", 2009.
  5. FAA, AC No. 20-107B, Advisory Circular, "Aircraft Composites Structure", 2009.
  6. XIE Jian, LU Yao, "Study on Airworthiness Requirements of Composites Aircraft for Transport Category Aircraft in FAA", Procedia Engineering Vol. 17, pp. 270-278, 2011. https://doi.org/10.1016/j.proeng.2011.10.028
  7. Chantal Fualdes, et al, "Transport Airplane Metallic and Composite Structures Working Group - Recommendation Report to FAA", Transport Airplane Metallic and Composite Structures Working Group of FAA, June 27, 2018.
  8. ASTM F3114-15, "Standard Specification for Structures", 2015.
  9. Choi, C. H., and Choi, H. S. "Application Methodology of Composites Material for KHP", KSASS, 2006 Spring Conference, pp. 136-139, 2006.
  10. Choi, C. H., "Reliability Application of re-manufacturing for Military Industry", KSME, Vol. 2015, No. 11, pp. 1784-1811, 2015.
  11. Choi, C. H., and Lee, S. C. et al., "Development of Aft Fuselage and Tail Rotor for Korean Helicopter Program(KHP)", KSASS, pp. 1104-1107, 2005.
  12. Choi, C. H., "Damage Tolerance Design and Assessment for Composite Structures of Aircraft", 2006 Spring Aerospace weapon system Development Conference, ADD, 2006.
  13. Raif Sakin and Irfan Ay, " Statistical analysis of bending fatigue life data using Weibull distribution in glass-fiber reinforced polyester composites", Material and design, vol. 29, pp. 1170-1181, 2008. https://doi.org/10.1016/j.matdes.2007.05.005
  14. Disney, R. L., Sheth, N. J., and Lipson, C., "The Determination of the Probability of Failure by Stress/Strength Interference Theory," Proceedings of the Annual Symposium on Reliability, pp. 417-422, 1968.
  15. Zhaofeung Huang, Yan Jin, " Extension of Stress and Strength Interference Theory for Conceptual Design for Reliability", Transaction of the ASME, Vol. 131, July, pp. 071001-11, 2002.
  16. Kyung K. Choi, Byeng D. Youn, " An Investigation of Nonlinearity of Reliability-Based Design Optimization Approachs", ASME 2002, Design Engineering Technical Conference and Composites and Information in Engineering Conference, Montreal, Sept. 29-Oct. 2, 2002.
  17. Rosenblatt, M., "Remarks on a Multivariate Transformation", Annuals of Mathematical Statistic, Vol. 23, pp. 470-472, 1952.
  18. Cornell, C. A., "Bounds on the Reliability of Structural Systems," Journal of the Structural Division, ASCE, Vol. 93, No. ST., Feb. 1967.
  19. Youn Byeng Dong, "Probabilistic Engineering analysis and Design", Chapter 4. Probabilistic Engineering analysis - Time independent Performance, SNU, Lecture Note, pp. 51-76, 2017.
  20. Yan Gang Zhao and Tetsuro Ono, " Moment method for structural reliability", Structural Safety, Vol. 23, pp. 47-75, 2001. https://doi.org/10.1016/S0167-4730(00)00027-8
  21. Xiaoping Du, "Probabilistic Engineering Design", Chapter seven, First Order and Second Reliability Methods, University of Missouri, Sept. pp. 1-33, 2005.
  22. Rosenblatt Transformation(1952) "Structural Reliability Analysis and Prediction", Third Edition. Robert E. Melchers and Andre T. Beck. 2018.