Optimal Design of CNT-Nanocomposite Nonlinear Shells

Area of Science:

• Materials Science
• Mechanical Engineering
• Nanotechnology

Background:

• Carbon nanotube/polymer nanocomposites offer superior properties for lightweight structures.
• Controlling material distribution is key to optimizing structural stability and nonlinear response.

Purpose of the Study:

• To optimize carbon nanotube (CNT)/polymer nanocomposite beams and shells for enhanced stability.
• To investigate the effects of CNT distribution and orientation on structural performance.

Main Methods:

• Utilized nonlinear finite element schemes for material optimization.
• Employed Koiter reduced order models and isogeometric solid-shell models for efficient analysis.
• Applied the Global Convergent Method of Moving Asymptotes for optimization.

Main Results:

• Varying CNT volume fraction and orientation significantly improves elastic stability.
• Optimized CNT distribution enhances the collapse load and controls nonlinear behavior.
• Curved shells with tailored CNT distribution can achieve globally stable postbuckling responses.

Conclusions:

• Strategic material optimization of CNT nanocomposites is crucial for advanced lightweight structures.
• Tailoring CNT distribution offers a powerful method to enhance structural stability and performance.
• This approach enables the design of more robust and reliable nanocomposite components.