Numerical Optimization of the Welding Sequence for Mitigating Welding Deformation in Aluminum Pipe Structures by Using a
- PDF / 2,787,451 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 108 Downloads / 220 Views
International Journal of Precision Engineering and Manufacturing https://doi.org/10.1007/s12541-020-00420-x
REGULAR PAPER
Numerical Optimization of the Welding Sequence for Mitigating Welding Deformation in Aluminum Pipe Structures by Using a Genetic Algorithm Minwook Choi1 · Chunbiao Wu1 · Jae‑Woong Kim2 Received: 12 November 2019 / Revised: 30 June 2020 / Accepted: 18 September 2020 © Korean Society for Precision Engineering 2020
Abstract Aluminum is widely used in fields that require lightweight technology, such as in the aerospace and automobile industries. The welding of aluminum alloys, however, tends to generate large deformations in the welded structures due to its large heat conductivity and thermal expansion. Therefore, this study aims to reduce welding deformations that occur in the welding process by obtaining an optimal welding sequence. The welding sequence optimization process consists of two main stages. The first involves the prediction of the welding deformation behavior by using thermo-elastic-plastic finite element analysis. The second stage optimizes the welding sequence by using a genetic algorithm (GA), which can efficiently optimize very large solution spaces considering not only the welding sequence, but also the welding direction. In addition, this study proposed an appropriate and efficient GA for the present optimization problem. The optimization results showed that the developed finite element analysis model were in good agreement with the experimental results, and the proposed optimization tool can reduce the welding deformation considerably. Keywords Aluminum structure · Rectangular pipe · Welding induced deformation · Welding sequence optimization · Finite element analysis · Genetic algorithm
1 Introduction As the EU’s environmental regulations are strengthened, the automotive industry is struggling to meet emission standards. Automotive emissions can be reduced or prevented through mitigation systems such as selective catalyst reduction (SCR), exhaust gas recirculation (EGR), diesel particulate filtering (DPF), or the use of electric/hydrogen fuelbased vehicles, but these methods are restricted by technical limitations and lack of infrastructure. Therefore, a fundamental solution is required, such as the reduction of fuel consumption via vehicle weight reduction [1, 2]. However, in practical applications deformation, among other issues, * Jae‑Woong Kim [email protected] 1
Department of Mechanical Engineering, Graduate School of Yeungnam University, Gyeongsan, Gyeongbuk 38541, South Korea
School of Mechanical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 38541, South Korea
2
poses a serious problem when attempting to manufacture lightweight vehicles. Many automobile parts are still being manufactured via welding processes. Due to the characteristics of these welding processes, however, it is difficult to control the thermal deformation that occurs when assembling parts with low rigidities or weak heat resistance, such as thin plates and aluminum. Due to the pa
Data Loading...
