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http://dx.doi.org/10.7234/composres.2021.34.5.283

Derivation of Knockdown Factors for Composite Cylinders with Various Initial Imperfection Models  

Kim, Do-Young (Department of Aerospace Engineering, Chungnam National University)
Sim, Chang-Hoon (Department of Aerospace Engineering, Chungnam National University)
Park, Jae-Sang (Department of Aerospace Engineering, Chungnam National University)
Yoo, Joon-Tae (Launcher Structures and Materials Team, Korea Aerospace Research Institute)
Yoon, Young-Ha (Launcher Structures and Materials Team, Korea Aerospace Research Institute)
Lee, Keejoo (Future Launcher R&D Program Office, Korea Aerospace Research Institute)
Publication Information
Composites Research / v.34, no.5, 2021 , pp. 283-289 More about this Journal
Abstract
This paper derives numerically the buckling Knockdown factors using two different initial imperfection models, such as geometric and loading imperfection models, to investigate the unstiffened composite cylinder with an ellipse pre-buckling deformation pattern. Single Perturbation Load Approach (SPLA) is applied to represent the geometric initial imperfection of a thin-walled composite cylinder; while Single Boundary Perturbation Approach (SBPA) is used to represent the geometric and loading imperfections simultaneously. The buckling Knockdown factor derived using SPLA is higher than NASA's buckling design criteria by approximately 84%, and lower than buckling test result by 9%. The buckling Knockdown factor using SBPA is higher than NASA's buckling design criteria by about 75%, and 14% lower than the buckling test result. Therefore, it is shown that the buckling Knockdown factors derived in this study can provide a lightweight design compared to the previous buckling design criteria while they give reasonably a conservative design compared to the buckling test for both the initial imperfection models.
Keywords
Composite cylinder; Buckling knockdown factor; Geometric imperfection; Loading imperfection;
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1 Hao, P., Wang, B., Li, G., Meng, Z., Tian, K., Zeng, D., and Tang, X., "Worst Multiple Perturbation Load Approach of Stiffened Shells with and without Cutouts for Improved Knockdown Factors," Thin-Walled Structures, Vol. 82, 2014, pp. 321-330.   DOI
2 Regab, M.M., Cheatwood, F.M., Hughes, S.J., and Lowry, A., "Launch Vehicle Recovery and Reuse," AIAA SPACE 2015 Conference and Exposition, August, 2015.
3 Peterson, J.P., Seide, P., and Weingarten, V.I., "Buckling of Thinwalled Circular Cylinders," NASA SP-8007, 1968.
4 Degenhardt, R., Bethge, A., Kling, A., Zimmermann, R., and Rohwer, K., "Probabilistic Approach for Better Buckling Knock-down Factors of CFRP Cylindrical Shells - Tests and Analyses," 18th Engineering Mechanics Division Conference, June, 2007.
5 Degenhardt, R., "New Robust Design Guideline for Imperfection Sensitive Composite Launcher Structures - The DESICOS Project," 13th European Conference on Spacecraft Structures Materials and Environment Testing, June, 2014.
6 Zhao, Y., Chen, M., Yang, F., Zhang, L., and Fang, D., "Optimal Design of Hierarchical Grid-Stiffened Cylindrical Shell Structures Based on Linear Buckling and Nonlinear Collapse Analyses," Thin-Walled Structures, Vol. 119, 2017, pp. 315-323.   DOI
7 Wagner, H.N.R., Huhne, C., and Niemann, S., "Robust Knockdown Factors for the Design of Axially Loaded Cylindrical and Conical Composite Shells - Development and Validation," Composite Structures, Vol. 173, 2017. pp. 281-303.   DOI
8 Kim, D.Y., Sim, C.H., Kim, H.I., Park, J.S., Yoo, J.T., Yoon, Y.H., and Lee, K., "Derivations of Buckling Knockdown Factors for Composite Cylinders Considering Various Shell Thickness Ratios and Slenderness Ratios," Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 49, No. 4, 2021, pp. 321-328.   DOI
9 Sim, C.H., Park, J.S., Kim, H.I., Lee, Y.L., and Lee, K., "Post-buckling Analyses and Derivations of Knockdown Factors for Hybrid-Grid Stiffened Cylinders," Aerospace Science and Technology, Vol. 82-83, 2018, pp. 20-31.   DOI
10 Sim, C.H., Kim, H.I., Lee, Y.L., Park, J.S., and Lee, K., "Derivations of Knockdown Factors for Cylindrical Structures Considering Different Initial Imperfection Models and Thickness Ratios, International Journal of Aeronautical and Space Sciences, Vol. 19, No. 3, 2018, pp. 626-635.   DOI
11 Geier, B., Meyer-Piening, H.R., and Zimmermann, R., "On the Influence of Laminate Stacking on Buckling of Composite Cylindrical Shells subjected to Axial Compression," Composite Structures, Vol. 55, No. 4, 2002, pp. 467-474.   DOI
12 Hilburger, M.W., "Shell Buckling Knockdown Factor Project Overview and Status," NASA NF1676L-21449, 2015.
13 Rhee, S.Y., Kim, K., Yoon, Y.H., and Yi, M.K., "Current Status of Development of Composite Propellant Tanks for a Launch Vehicle," Current Industrial and Technological Trends in Aerospace, Vol. 18, No. 2, 2020, pp. 127-138.
14 Haynie, W.T., and Hilburger, M.W., "Comparison of Methods to Predict Lower Bound Buckling Loads of Cylinders under Axial Compression," 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, April, 2010.
15 Hilburger, M.W., "Developing the Next Generation Shell Buckling Design Factors and Technologies," 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Material Conference, April, 2012.
16 Wang, B., Tian, K., Zhou, C., Hao, P., Zheng, Y., Ma, Y., and Wang, J., "Grid-Pattern Optimization Framework of Novel Hierarchical Stiffened Shells Allowing for Imperfection Sensitivity," Aerospace Science and Technology, Vol. 62, 2017, pp. 114-121.   DOI
17 Wagner, H.N.R., Huhne, C., Niemann, S., and Khakimova, R., "Robust Design Criterion for Axially Loaded Cylindrical Shells - Simulation and Validation," Thin-Walled Structures, Vol. 115, 2017, pp. 154-162.   DOI
18 Wagner, H.N.R., Huhne, C., Niemann, S., Tian, K., Wang, B., and Hao, P., "Robust Knockdown Factors for the Design of Cylindrical Shells under Axial Compression: Analysis and Modeling of Stiffened and Unstiffened Cylinders," Thin-Walled Structures, Vol. 127, 2018, pp. 629-645.   DOI
19 Huhne, C., Rolfes, R., Breitbach, E., and Tessmer, J., "Robust Design of Composite Cylindrical Shells under Axial Compression - Simulation and Validation," Thin-Walled Structures, Vol. 46, 2008, pp. 947-962.   DOI
20 Sim, C.H., Kim, H.I., Park, J.S., and Lee, K., "Derivation of Knockdown Factors for Grid-Stiffened Cylinders Considering Various Shell Thickness Ratios," Aircraft Engineering and Aerospace Technology, Vol. 91, No. 10, 2019, pp. 1314-1326.   DOI
21 Kim, H.I., Sim, C.H., Park, J.S., Lee, K., Yoo, J.T., and Yoon, Y.H., "Numerical Derivation of Buckling Knockdown Factors for Isogrid-Stiffened Cylinders with Various Shell Thickness Ratios," International Journal of Aerospace Engineering, Vol. 2020, 2020, 9851984.
22 Lee, T.H., "Review of the Composite Materials Application to the Solid Rocket Motor Cases," Composites Research, Vol. 25, No. 3, 2012, pp. 82-89.