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Reliability-based multi-objective optimization incorporating process–property–performance relationship of double-pulse MIG welding using hybrid optimization strategy

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Abstract

As an effective lightweight technique, reliability-based multi-objective optimization (RBMO) for welding process parameters of aluminum alloy sheets demonstrates the unprecedented potential and stability in the automobile manufacturing. In order to ensure load-bearing capacity and assembly feasibility of welded joints in the body structure, the process–property–performance (3P) relationship should be fully considered in optimizing double-pulse MIG (DP-MIG) welding process parameters. This study proposes an RBMO design of welding process parameters that employed a hybrid optimization strategy (HOS), which includes screening significant parameters, building process–property meta-models, and searching optimal solution under performance requirements. Combining entropy weight and technique for order preference by similarity to an ideal solution for Plackett–Burman design is used to screen significant parameters. Then, the response surface methodology based on central composite design is used to construct the regression models between significant factors and responses. Also, the reliability of each response is analysed through the Monte Carlo simulation and Design for Six Sigma design. The non-dominated sorting genetic algorithm and multi-objective decision criteria based on performance requirements are employed to find the optimal solution of RBMO. The effectiveness and applicability of the proposed HOS method are demonstrated by optimization of DP-MIG welding process parameters, which could yield improvements of load-bearing, geometry performance of welded joints and their robustness. The combination of 3P relationships and optimization design reveals the internal connection between design and manufacturing, and provides a guideline for DP-MIG welding parameters design. RBMO can be generally applied to types of jointing technology in automotive manufacturing and the proposed HOS method can be used in the optimization design of multiple influencing factors and multiple responses.

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Funding

The authors acknowledge the financial support from the National Key Research and Development Plan of China (Grant No. 2016YFB0101601-7) and Graduate Innovation Fund of Jilin University (Grant No.101832020CX134).

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Correspondence to Xin Chen.

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The authors declared no potential conflicts of interest with respect to the research and publication of this article.

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The results presented in this paper can be replicated using software Design-Expert, Isight, and Matlab. The data and codes will be available once requested.

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Wang, J., Chen, X. & Yang, L. Reliability-based multi-objective optimization incorporating process–property–performance relationship of double-pulse MIG welding using hybrid optimization strategy. Struct Multidisc Optim 65, 148 (2022). https://doi.org/10.1007/s00158-021-03103-x

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  • DOI: https://doi.org/10.1007/s00158-021-03103-x

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