Analysis of angular distortion in line-heating

Son, Kwang-Jae; Yun, Jin-Oh; Kim, Y.W.; Yang, Young-Soo

doi:10.1016/j.ijmecsci.2007.02.008

Cited by 9 publications

(2 citation statements)

References 19 publications

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“…Major shipyards adopt various kinds of processes for the purpose of correcting distortion [13][14][15] . Among them, the line-heating method, which utilizes thermal stress in the reverse direction for correcting distortion, has been primarily used because of its effectiveness 16) . The line-heating process can be performed flexibly according to the structural conditions and degree of distortion.…”

Section: Introductionmentioning

confidence: 99%

Effect of Line-Heating on the Microstructural and Mechanical Characteristics of 320-MPa-Grade High-Strength Hull Plates

et al. 2022

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This study examined the effect of the line-heating process on the microstructure and mechanical properties of 320-MPa-grade high-strength steel designed for low-temperature applications. The samples were heated thrice to the maximum temperature condition of 900 ℃ prior to air cooling or water quenching. Tensile strength and Charpy impact toughness tests were performed to understand the variation in the mechanical characteristics across the thermal histories. The decrease in the tensile strength of the air-cooled specimen was attributed to grain growth and phase transformation caused by slow cooling, while the water quenched specimen exhibited grain refinement. The experimental results indicated that the line-heating process was suitable because all the specimens with various thermal histories satisfied the international classification standard.

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Section: Introductionmentioning

confidence: 99%

Effect of Line-Heating on the Microstructural and Mechanical Characteristics of 320-MPa-Grade High-Strength Hull Plates

et al. 2022

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“…Heat flow problems in line heating processes have been studied by many researchers with the principal focus being the modelling of the shape of the flux distribution or threedimensional heat conduction with a moving torch [2,4,5]. Some mathematical models that utilized analytic solutions to determine the angular deformation under numerous assumptions have been suggested [1,6]. However, by not considering the non-linearity *Corresponding author: Department of Mechanical Engineering, Chonnam National University, 300 Yongbong-dong, Bukgu, Gwangju 500-757, Republic of Korea.…”

Section: Introductionmentioning

confidence: 99%

Simplified mathematical formulas for the prediction of deformations in the plate bending process using an oxy-propane gas flame

Bae¹,

Yang

Hyun

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part B:

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Simplified mathematical formulas are proposed to predict deformations during the plate forming process via line heating with an oxy-propane flame. The formulas are derived from a statistical approach to the results of thermo-mechanical analyses using the finite element method (FEM) for combinations of practical heating parameters. As a first step, the heat flux of the flame is modelled as a single Gaussian distribution. A series of thermo-mechanical analyses are then performed with the heat flux model using an FEM-based commercial software. The results of the analyses are finally synthesized with their heating parameters for a statistical approach, which results in the simplified formulas. The results of the analyses and the predictions of the formulas are compared with those of the experimental measurements.

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