When the above code is completed with a correct B matrix, running it for a 0.2m square, 5mm thick, [0/90/90/0] graphite/epoxy plate under 1000 Pa gives:
The deflection surface plot shows the expected symmetric paraboloid shape. Composite Plate Bending Analysis With Matlab Code
Composite materials, particularly fiber-reinforced laminates, are extensively used in aerospace, automotive, and civil engineering due to their high strength-to-weight and stiffness-to-weight ratios. However, their anisotropic and layered nature makes bending analysis more complex than isotropic plates. When the above code is completed with a
This document presents a finite element analysis (FEA) approach for thin to moderately thick laminated composite plates based on Classical Laminate Plate Theory (CLPT) and First-Order Shear Deformation Theory (FSDT). A complete MATLAB code is provided to compute deflections, stresses, and strains. The deflection surface plot shows the expected symmetric
We assume the plate has a displacement field based on First-Order Shear Deformation Theory (FSDT). This accounts for transverse shear deformation, which is critical for thick composite plates.
For a point $(x, y, z)$:
Where: