Chinese Journal of Lasers, Volume. 41, Issue 11, 1103002(2014)
Numerical Simulation on Stainless Steel-Carbon Steel Laminated Sheet Considering Interface During Pulsed Laser Bending
Behavior of stainless steel-carbon steel laminated sheet (SCLS) including interfaces during pulsed laser bending is investigated using a multi-layered finite element model (FEM) based on thermal-structure indirect couple method. Through the analysis on temperature field, stress-strain field and displacement of stainless steel layer, carbon steel layer and the bonding interface during laser bending process, the impact of interface on bending angles and bending quality are explored. The results show that during laser bending process, temperature transfers smooth across the bonding interface, while transverse stress and strain have obvious mutations. After deformation, tensile stress exists at both the top and bottom stainless steel layers and compressive stress exists at the middle carbon steel layer. When laser power is 140 W, scanning speed is 800 mm/min, the defocus amount is 10 mm, the maximum stress of Z-direction on the bonding interface is 87.5 MPa, which is smaller than the bonding strength of the laminate sheet (≥210 MPa). An effective curved laminate sheet is achieved using both experiment and simulation methods and the error is less than 5%. The simulation provides a good basis on both theory and experiment for better bending quality of SCLS.
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Chi Shanshan, Wang Xuyue, Xu Wenji. Numerical Simulation on Stainless Steel-Carbon Steel Laminated Sheet Considering Interface During Pulsed Laser Bending[J]. Chinese Journal of Lasers, 2014, 41(11): 1103002
Category: laser manufacturing
Received: Apr. 24, 2014
Accepted: --
Published Online: Oct. 8, 2014
The Author Email: Shanshan Chi (823731463@qq.com)