Concurrent Lamination and Tapering Optimization of Cantilever Composite Plates under Shear

Area of Science:

• Composite Materials Engineering
• Structural Optimization
• Mechanical Design

Background:

• Cantilever composite structures offer potential for improved performance through stiffness tailoring and geometric design.
• Existing studies have not fully exploited the combined benefits of these design strategies.
• Lamination parameters are crucial for describing composite plate stiffness, independent of specific laminate configurations.

Purpose of the Study:

• To simultaneously optimize layer and taper angles of cantilever laminates.
• To minimize average tip edge deflection under shear loads with constant length and volume.
• To investigate the influence of plate aspect ratio on optimization effectiveness.

Main Methods:

• Utilizing lamination parameters to define plate stiffness properties.
• Employing finite element analyses (FEA) for response computation.
• Applying genetic algorithms (GA) for determining optimal design variables.

Main Results:

• Plate aspect ratio significantly impacts the effectiveness of stiffness tailoring and tapering.
• Concurrent optimization of lamination characteristics and plate geometry is essential for maximum performance.
• Simultaneous optimization yields different results compared to individual or sequential optimization of angles.

Conclusions:

• Simultaneous optimization of layer and taper angles is superior to sequential approaches for composite design.
• Integrated design considering both material (lamination) and geometry (taper) is key to enhanced cantilever performance.
• The findings highlight the limitations of traditional, stepwise optimization methods in composite structural design.