... would be generated to make the plate produce out-of-plane displacement. There are three main ways of hot forming according to heating source forms, including line heating with flame (oxygen-acetylene flame), laser heating and high frequency induction heating. At present, the fore two hot bending forming...

... prediction procedure dimensional analysis technological parameter ship hull plate artificial intelligence steel plate heating inherent strain method procedure deformation line heating dong tum angular deformation heat source coefficient machine learning thermal process...

... ABSTRACT In this study, the proposed linearized inherent strain method for predicting straightening of welded structures is investigated. Thermal elastic-plastic analysis is used to compute inherent strain of a thin flat plate caused by line heating. An accurate gas heat source model...

... heating is proposed based on the numerical study. assembly welding line heating magnitude deformation gap correction bilge plate shrinkage stiffness small deformation bilge block inherent deformation mechanism relation computation deformation theory residual stress distortion...

... distortion for the experiment and FE analysis using ISM. Fig. 8 Temperature distribution during line heating. 0 200 400 600 800 1000 1200 1400 0 10 20 30 40 50 60 Measured temperature2400J/ mm (Simulation)2160J/ mm (Simulation)1920J/ mm (Simulation)1680J/ mm (Simulation) Te m pe ra tu re [o C] Disatance from...

... Influential Factors Affecting Inherent Deformation during Plate Forming by Line Heating (Report 5) The Effect of Water Cooling Adan Vega Department of Mechanical Engineering, Technological University of Panama, Panama Masashi Nawafune Graduate School of Engineering, Osaka University, Ibaraki...

... A 3-D thermal-elastic-plastic finite element analysis is performed to investigate the influence of temperature dependent material properties on prediction of inherent deformation due to line heating when numerical analysis by FEM is used. First, the temperature dependent material properties...

... induced deformation produced by crossed heating lines is proposed. INTRODUCTION Line heating is an effective method to form curved shell plates with complex three-dimensional geometry. However, line heating process is mostly dependent on the skill of hard-to-find experienced workers. Therefore...

... ABSTRACT The temperature of the gas adjacent to the plate TG and local heat transfer coefficient α can be considered to remain nearly unchanged with time during spot and line heating. A generic algorithms (GA)- based direct identification technique for TG and α is proposed. TG and α during...

... In order to clarify the mechanism of thick plates forming by complex line heating, the distribution characteristics of inherent deformation produced by overlap, parallel and cross heating lines is studied. From this study it is found that the final inherent deformation is not a simple addition...

...Paper No. 2006-302 Jang 1 Determination of Optimal Heating Conditions in Line Heating Process with Weaving Motions Chang Doo Jang 1, Yun Sok Ha 2, Yong Tae Kim1 1 Dept. of Naval Architecture & Ocean Engineering, Seoul National University 2 Research Institute of Marine Systems Engineering, Seoul...

...Prediction of Plate Deformation Considering Film Boiling in Water Cooling Process after Line Heating Chang Doo Jang, Jung Su Kim, Yun Sok Ha, Young Hwa Lee Dept. of Naval Architecture and Ocean Engineering, Seoul National University Seoul, Korea ABSTRACT The phase of steel changes from austenite...

... ABSTRACT During fabrication of deck house block in passenger ships, the problem of unexpected large deformation and distortion frequently occurs. Hence, amending of these deformation become more important in thin plate welding. The spot heating and line heating methods were very widely...

...An Improved Inherent Strain Analysis for the Prediction of Plate Deformations Induced by Line Heating Considering Phase Transformation of Steel Chang Doo Jang, Yun Sok Ha, Dae Eun Ko Dept. of Naval Architecture and Ocean Engineering, Seoul National University Seoul, Korea ABSTRACT The inherent...

... ABSTRACT In order to develop a simple method for predicting the twisting deformation of longitudinal stiffeners by line heating, the mechanism of twisting is investigated. This type of forming can be separated into three types, depending on the area to be heated and the external restraint...