Dealing with discreteness

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Dealing with discreteness • Laminate thickness must be integer multiple of basic ply thickness. • Ply orientations often need to be selected from a small set of angles, e.g. • In terms of optimization algorithms we transition from algorithms that use derivatives to algorithms that do not. • Integer programming is usually

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Dealing with discreteness. Laminate thickness must be integer multiple of basic ply thickness. Ply orientations often need to be selected from a small set of angles, e.g. In terms of optimization algorithms we transition from algorithms that use derivatives to algorithms that do not. - PowerPoint PPT Presentation

Transcript of Dealing with discreteness

Dealing with discreteness

Dealing with discreteness

Finite number of points and excluded regions

Which points do we lose with balance condition?Diagram is for 8-ply laminate. What will change and what will remain the same for 12 plies?

Continuous Example 4.2.1

Where on diagram?

Different visualization

Example 4.3.1

2.3 Bending deformation of isotropic layer classical lamination theoryBending response of a single layer

Bending stresses proportional to curvatures

Hookes lawMoment resultants

D-matrix (EI per unit width)

Bending of symmetrically laminated layers

The power of distance from mid-plane