Structural Engineering and Mechanics

  • 제2권4호
  • /
  • Pages.383-393
  • /
  • 1994
  • /
  • 1225-4568(pISSN)
  • /
  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Viscoelastic analysis of residual stresses in a unidirectional laminate

  • Lee, Sang Soon (Mechanical Systems Engineering Dept., Korea Atomic Energy Research Institute) ;
  • Sohn, Yong Soo (Mechanical Systems Engineering Dept., Korea Atomic Energy Research Institute)
  • 발행 : 1994.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

The residual stress distribution in a unidirectional graphite/epoxy laminate induced during the fabrication process is investigated at the microstress level within the scope of linear viscoelasticity. To estimate the residual stresses, the fabrication process is divided into polymerization phase and cool-down phase, and strength of materials approach is employed. Large residual stresses are not generated during polymerization phase because the relaxation modulus is relatively small due to the relaxation ability at this temperature level. The residual stresses increase remarkably during cool-down process. The magnitude of final residual stress is about 80% of the ultimate strength of the matrix material at room temperature. This suggests that the residual stress can have a significant effect on the performance of composite structure.

키워드

참고문헌

  1. Bikales, N. M. (1967), Encyclopedia of Polymer Science and Technology, 6, John Wiley & Sons, Inc.
  2. Hahn, H. T. (1976), "Residual stresses in polymer matrix composite laminates", J. Composite Materials, 10, 266-277. https://doi.org/10.1177/002199837601000401
  3. Hahn, H. T. and Pagano, N. J. (1975), "Curing stresses in composite laminates", J. Composite Materials, 9, 91-106. https://doi.org/10.1177/002199837500900110
  4. Kim, R.Y. and Hahn, H.T. (1979), "Effect of curing stresses on the first ply-failure in composite - laminates", J. Composite Materials, 13, 2-14. https://doi.org/10.1177/002199837901300101
  5. Lee, W.I., Loos, A. C., and Springer, G. S. (1982), "Heat of reaction and viscosity of hercules 35016 resin", J. Composite Materials, 16, 510-520. https://doi.org/10.1177/002199838201600605
  6. Miyano, Y., Kanemitsu, M., Kunio, T., and Kuhn, H.A. (1986), "Role of matrix resin on fracture strength of unidirectional CFRP", J. Composite Materials, 20, 520-538. https://doi.org/10.1177/002199838602000602
  7. Roy, A. and Murthy, P. N. (1976), "Viscoelastic analysis of the residual stress in glass fiber reinforced plastics", Fiber Science and Technology, 9, 81-101. https://doi.org/10.1016/0015-0568(76)90014-2
  8. Shimbo, M. and Ochi, M., and Shieta, Y. (1981), "Shrinkage and internal stress during curing of epoxide resin", J. Appl. Polymer Sci., 26, 2265-2277. https://doi.org/10.1002/app.1981.070260714
  9. Slobodzinski, A. (1984), Bag Molding Processes, Handbook of Composite, Lubin, G. (ed.), Van Nostrand Reinhold Company Inc..
  10. Taratorin, B. I. and Kryzhanovskii, V. V. (1970), "Relaxation and optical properties of cured epoxy resin", Mechanics of Composite Materials (translated from Mekhanika Polimerov, Moscow), p.12.
  11. Tsai, S. W. and Hahn, H. T. (1980), Introduction to Composite Materials, Technomic.
  12. Weitsman, Y. (1979), "Residual thermal stresses due to cool-down of epoxy-resin composite", ASME J. Appl. Mech., 46, 563-567. https://doi.org/10.1115/1.3424606
  13. Weitsman, Y. and Ford, D. (1977), "On the optimization of cool-down temperatures in viscoelastic resins," Proc. Soc. Engineering Science, 323-339.
  14. Zweben, C. (1984), "Mechanics of composite materials", Composite Materials: processing, quality assurance and repair, Zweben, C. and Bader, M.G.(ed.), (A Five Day Short Course; Sept, 17-21, UCLA).

피인용 문헌

  1. Computational developments for simulation based design: Multi-scale physics and flow/thermal/cure/stress modeling, analysis, and validation for advanced manufacturing of composites with complex microstructures vol.10, pp.1-2, 2003, https://doi.org/10.1007/BF02736208
  2. Dimensional Accuracy of Thermoset Composites: Simulation of Process-Induced Residual Stresses vol.35, pp.24, 2001, https://doi.org/10.1177/002199801772662000
  3. Simulation and verification of machining deformation for composite materials vol.29, pp.5, 2014, https://doi.org/10.1007/s11595-014-1020-6
  4. Boundary element analysis of singular thermal stresses in a unidirectional laminate vol.5, pp.6, 1997, https://doi.org/10.12989/sem.1997.5.6.705
  5. Prediction of Process-Induced Residual Stress for Laminated Composites with Metallic Plate vol.87-88, pp.1662-8985, 2009, https://doi.org/10.4028/www.scientific.net/AMR.87-88.333
  6. Time-dependent and inelastic behaviors of fiber- and particle hybrid composites vol.34, pp.4, 1994, https://doi.org/10.12989/sem.2010.34.4.525
  7. Residual Stresses Characterization of Laminated Composites Curing by FEM and FBG Sensor vol.19, pp.2, 1994, https://doi.org/10.1177/0967391111019002-307