Fig 1. Form of local buckling of various section
Fig 2. Typical load displacement behavior of a thin plate
Fig 3. Normalized crippling data for the no edge free case [4]
Fig 4. Normalized crippling data for the one edge free case [4]
Fig 5. Crippling analysis procedure
Fig 6. Specimen configuration and size
Fig 7. Force-displacement curve for A1 specimen
Fig 8. Force-displacement curve for A2 specimen
Fig 9. Force-displacement curve for A3 specimen
Fig 10. Force-displacement curve for B1 specimen
Fig 11. Force-displacement curve for B2 specimen
Fig 12. Force-displacement curve for B3 specimen
Fig 13. Crippling strength v.s. L/t for A1∼A3 specimens
Fig 14. Crippling strength v.s. L/t for B1∼B3 specimens
Fig 15. Comparison of crippling strength between test and empirical equation for A1∼A3 specimens
Fig 16. Comparison of crippling strength between test and empirical equation for B1∼B3 specims
Fig 17. Comparison of failure mode between test and numerical model
Table 1. T700G/2510 laminate properties
Table 2. Comparison of crippling strength between least square fit and preliminary design curve
Table 3. Material properties of CFRP lamina
Table 4. Layup pattern and dimension
Table 5. Summary of test and numerical analysis results
References
- ZP. Bazant and L. Cedolin, Stability of structures. elastic, inelastic, fracture and damage theories, Oxford University Press, 2010
- D. L. Bonanni, E. R. Johnson and J. H. Srarnes, "Local crippling of thin-walled graphite-epoxy stiffeners," AIAA Journal, Vol. 29, No. 29, 1991, pp. 1951-1959 https://doi.org/10.2514/3.10824
- T. Von Karman, and E. Sechler, "The strength of thin plates in compression," ASTM Appl Mech Trans, Vol. 54, 1932, pp. 53-57
- MIL-HDBK-17H, Composite Materials Handbook
- AGATE-WP3.3-033051-135, A-basis and B-basis design allowables for epoxy - based prepreg
- P. Natario, N. Silvestre and D. Cammtim, "Web crippling failure using quasi-static FE models," Thin-Walled Structures, Vol. 84, 2014, pp. 34-49 https://doi.org/10.1016/j.tws.2014.05.003
- P. Feraboli, B. Wade, F. Deleo, M. Rassian, M. Higgins and A. Byar, "LS-DYNA MAT54 modeling of the axial crushing of a composite tape," Composites: Part A, Vol. 42, 2011, pp. 1809-1825 https://doi.org/10.1016/j.compositesa.2011.08.004