A study on an efficient prediction of welding deformation for T-joint laser welding of sandwich panel Part II: Proposal of a method to use shell element model

作者：Kim Jae Woong; Jang Beom Seon^*; Kang Sung Wook

来源：International Journal of Naval Architecture and Ocean Engineering, 2014, 6(2): 245-256.

DOI：10.2478/IJNAOE-2013-0176

• Sandwich panel
• Laser welding
• Heat transfer analysis
• Hetero-layered approach
• Thermal elasto-plastic analysis

I-core sandwich panel that has been used more widely is assembled using high power CO2 laser welding. Kim et al. (2013) proposed a circular cone type heat source model for the T-joint laser welding between face plate and core. It can cover the negative defocus which is commonly adopted in T-joint laser welding to provide deeper penetration. In part I, a volumetric heat source model is proposed and it is verified thorough a comparison of melting zone on the cross section with experiment results. The proposed model can be used for heat transfer analysis and thermal elasto-plastic analysis to predict welding deformation that occurs during laser welding. In terms of computational time, since the thermal elasto-plastic analysis using 3D solid elements is quite time consuming, shell element model with multi-layers have been employed instead However, the conventional layered approach is not appropriate for the application of heat load at T-Joint. This paper, Part II, suggests a new method to arrange different number of layers for face plate and core in order to impose heat load only to the face plate.

• 出版日期2014-6