Pareto frontier for simultaneous structural and manufacturing optimization of a composite part

Pareto frontier for simultaneous structural and manufacturing optimization of a composite part

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Article ID: iaor200973066
Country: Germany
Volume: 40
Issue: 1
Start Page Number: 497
End Page Number: 511
Publication Date: Jan 2010
Journal: Structural and Multidisciplinary Optimization
Authors: , ,
Keywords: programming: multiple criteria
Abstract:

Optimized design of composite structures requires simultaneous optimization of structural performance and manufacturing process. Such a challenge calls for a multi-objective optimization. Here, a generating multi-objective optimization method called normalized normal constraint method, which attains a set of optimal solutions and allows the designer to explore design alternatives before making the final decision, is coupled with a local-global search called constrained globalized bounded Nelder–Mead method. The proposed approach is applied to the design of a Z-shaped composite bracket for optimization of structural and manufacturing objectives. Comparison of the results with non-dominated sorting genetic algorithm (NSGA-II) shows that when only a small number of function evaluations are possible and a few Pareto optima are desired, the proposed method outperforms NSGA-II in terms of convergence to the true Pareto frontier. The results are validated by an enumeration search and by exploring the neighbourhood of the final solutions.

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