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Blast Resistance of Confined Multilayer Graded Corrugated-Core Sandwich Cylindrical Shells
Pengbo Su1, Bin Han2, Yiyang Zhong1
1Xi'an Institute of Space Radio Technology, Xi'an 710100, China.
Materials (Basel, Switzerland)
|January 10, 2026
Summary
Graded multilayer corrugated-core sandwich shells offer superior blast resistance. Optimizing core wall thickness and layer height enhances protection against internal blast loading, with thickness grading proving most effective.
Area of Science:
- Mechanical Engineering
- Materials Science
- Structural Engineering
Background:
- Blast-resistant containers are crucial for protecting against internal explosions.
- Existing designs often face limitations in performance and efficiency.
- Multilayer corrugated-core sandwich cylindrical shells present a novel structural concept.
Purpose of the Study:
- To investigate the blast resistance of uniform and graded multilayer corrugated-core sandwich cylindrical shells.
- To identify optimal configurations for enhanced blast protection.
- To explore the influence of core wall thickness and layer height gradients.
Main Methods:
- Finite element analysis (FEA) was used to simulate internal blast loading.
- Systematic investigation of uniform and graded shell designs.
- Optimization using a radial basis function surrogate model and adaptive simulated annealing.
Main Results:
- Sandwich shells with internally thick and externally thin core walls showed superior blast resistance.
- Core layer height gradients (high inner, low outer) improved performance.
- Wall-thickness-graded structures consistently outperformed height-graded ones.
- Optimization identified configurations for maximum blast resistance or minimum mass.
Conclusions:
- Graded multilayer corrugated-core sandwich shells offer enhanced blast resistance.
- Specific grading strategies, particularly wall-thickness grading, are highly effective.
- Optimization techniques can tailor shells for specific performance requirements, balancing resistance and mass.
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