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March 10, 2026International Journal of Aerospace EngineeringOpen Access

Numerically Predicted Buckling Design Criteria for Elliptical Common Bulkhead Structures

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Authors

GKGi-Seop KimCSChang-Hoon SimCLChang-Min Lee

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Overview

Numerical analysis reveals modified buckling criteria in elliptical bulkheads, suggesting new design advantages.

Key Points

  • The aim is to predict buckling design criteria for elliptical common bulkhead structures to enhance lightweight designs.
  • Utilized ABAQUS for nonlinear finite element analysis of elliptical bulkhead structures.
  • Applied single dimple imperfection approach to model geometric imperfections.
  • Conducted thermal–structural coupled analyses for thermal imperfections.
  • Performed nonlinear postbuckling analyses to determine buckling knockdown factors.
  • As eccentricity increases, the buckling knockdown factor decreases.
  • The lowest buckling knockdown factor was obtained with a semiminor radius of 0.40 m.
  • Derived factors were at least 88.89% and 55.43% higher than NASA's design criteria, respectively.

Cite This Study

Kim et al. (2026) studied this question.

synapsesocial.com/papers/69af958570916d39fea4d381https://doi.org/10.1155/ijae/9952420
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