Premium
Simulation of the residual stresses in the contour laser welding of thermoplastics
Author(s) -
Potente H.,
Wilke L.,
Ridder H.,
Mahnken R.,
Shaban A.
Publication year - 2008
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20999
Subject(s) - residual stress , materials science , welding , allowance (engineering) , finite element method , ultimate tensile strength , constitutive equation , composite material , computer simulation , stress (linguistics) , material properties , process (computing) , mechanical engineering , structural engineering , mechanics , computer science , engineering , linguistics , philosophy , physics , operating system
This article presents the influence of the process parameters in laser transmission welding for plastics on the residual stress in the welded part. The contour welding process is modeled by means of finite element (FE) simulation. In this process, the weld seam is only partially heated, i.e., only part of it melts. The calculations are performed using a material model that describes the time‐dependent temperature and stress development in a plate geometry, making allowance for the material's asymmetric compressive‐tensile behavior. Experimental data were measured under different load cases to present the time‐dependent material behavior, and then implemented in numerical terms by formulating the necessary constitutive equations. The calculations to simulate the influence of process parameters on the residual stress behavior were performed using a finite element model that was developed. The simulation covers the entire welding process, including the heating and cooling stages. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers