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Topology optimization

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an introduction to topology optimization

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Topology optimization

1. 1. Topology Optimization P Venkat Vijay Kumar Mechanical branch KLUniversity
2. 2. What is Topology???Topology is a major area of mathematics concerned with properties that are preserved under continuous deformations of objects, such as deformations that involve stretching, but no tearing or gluing
3. 3. Then… Optimization???In mathematics, computational science, or management science, mathematical optimization (alternatively, optimization or mathematical programming) refers to the selection of a best element from some set of available alternatives.
4. 4. Finally… Topology OptimizationTopology optimization is a mathematical approach that optimizes material layout within a given design space, for a given set of loads and boundary conditions such that the resulting layout meets a prescribed set of performance targets.
5. 5. How???• Any optimization technique can be used as tool of optimization in Topology Optimization.• An objective function has to be formulated which has to be optimized / maximized / minimized.• Then using the optimization techniques number of probabilities are produced and the result that suits best is choosen.
6. 6. Detailed how????• Lets start with little more detail.• Consider a structure or component, say a cantilever beam. Let our objective be minimizing the deflection if possible, minimizing the mass Cantilever beam Load F
7. 7. Original deflections and stresses in the beam in the initial conditions of load and structure
8. 8. Divide the cantilever into number of 1 1 1 1 1 1 1 1 1 1 checks i.e. rows 1 1 1 1 1 1 1 Cantilever beam 1 1 1 1 1 1 1 1 1 1 1 1 1 and columns. 1 1 1 1 1 1 1 1 1 1 Now, considering the presence of material as 1 and void as 0, number the checks one by one
9. 9. • Now would be the task of optimization.• The numbers considered are taken into a row matrix [1 1 1 .. .. .. 40 1’s]• From the original analysis its clear that some portion of the beam is not taking the load, therefore lets remove the portion with less stress.
10. 10. 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 Cantilever beam 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1[1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1] - A parent
11. 11. 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1 1 1 Cantilever beam 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1[1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1] - One more parent
12. 12. • For each parent we analyze the amount of mass and deflection that occurs• And keep doing until our objective is met.• A topology optimized cantilever beam is as follows…
13. 13. Software… soft procedure • Modeling • Analysis • Optimizing • Remodeling • Producing manufacturable design
14. 14. Applications• Now Topology optimization is being spread to composite structures• Topology optimization is the major tool for optimizing aero structures• There are lot of things around us that have to be optimized… ..