An extension of decomposition-based assembly synthesis for structural modularity is presented where the early identification of shareable components within multiple structures is posed as an outcome of the minimization of estimated manufacturing costs. The manufacturing costs of components are estimated under given production volumes considering the economies of scale. Multiple structures are simultaneously decomposed, and the types of welded joints at component interfaces are selected from a given library, in order to minimize the overall manufacturing cost and the reduction of structural strength due to the introduction of joints. A multiobjective genetic algorithm is used to allow effective examination of trade-offs between manufacturing cost and structural strength. A new joint-oriented representation of structures combined with a “direct” crossover is introduced to enhance the efficiency of the search. A preliminary case study with two simplified aluminum space frame automotive bodies is presented to demonstrate that not all types of component sharing are economically justifiable under a certain production scenario.
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e-mail: kazu@umich.edu
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July 2005
Technical Papers
Decomposition-Based Assembly Synthesis of Multiple Structures for Minimum Manufacturing Cost
Onur L. Cetin,
Onur L. Cetin
Graduate Student, Research Assistant
Department of Mechanical Engineering,
University of Michigan
, Ann Arbor, MI 48109-2125
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Kazuhiro Saitou
Kazuhiro Saitou
Associate Professor
Department of Mechanical Engineering,
e-mail: kazu@umich.edu
University of Michigan
, Ann Arbor, MI 48109-2125
Search for other works by this author on:
Onur L. Cetin
Graduate Student, Research Assistant
Department of Mechanical Engineering,
University of Michigan
, Ann Arbor, MI 48109-2125
Kazuhiro Saitou
Associate Professor
Department of Mechanical Engineering,
University of Michigan
, Ann Arbor, MI 48109-2125e-mail: kazu@umich.edu
J. Mech. Des. Jul 2005, 127(4): 572-579 (8 pages)
Published Online: September 6, 2004
Article history
Received:
June 30, 2003
Revised:
September 6, 2004
Citation
Cetin, O. L., and Saitou, K. (September 6, 2004). "Decomposition-Based Assembly Synthesis of Multiple Structures for Minimum Manufacturing Cost." ASME. J. Mech. Des. July 2005; 127(4): 572–579. https://doi.org/10.1115/1.1897409
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