Venu Gopal Reddy

University of Hertfordshire, United Kingdom

Title: Predict residual stresses in glass components using additive manufacturing specifically laser powder bed function, advanced FEA techniques

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Biography

TBA

Abstract

This study presents the development of a 3D finite element model aimed at simulating the dynamically powered-bed additive manufacturing of soda lime glass material. To accomplish this, a numerical simulation was performed using non-linear transient thermal and structural analysis, which involved altering the fusion process parameters, namely laser power and laser moving speed. The simulation was conducted using the ABAQUS software, and a moving gaussian distributed heat source model was implemented using deflux subroutine code. The model takes into account all major phenomena associated with the manufacturing process, such as thermal conditions and convection heat loss. A mesh sensitivity study was conducted to determine the optimum cell size and meshing technique. The model is capable of calculating the temperature field, residual stresses, and strain during the fusion process. The results indicate that a minimum of 30 W of laser power is sufficient for this work, and increasing the laser power results in higher residual stresses. Moreover, the study shows that the laser's moving speed and path have a significant impact on the structural and thermal results of the specimen. The study also employs unidirectional and alternative fusion path techniques to reduce the temperature field, residual stresses, and deformation.