(429f) Realistic Thermal Sensor Modeling Using Finite Element Method (FEM) of Direct Metal Laser Solidification (DMLS)
AIChE Annual Meeting
2021
2021 Annual Meeting
Topical Conference: Sensors
General Poster Session in Sensors - Virtual
Monday, November 15, 2021 - 10:30am to 12:00pm
Thus, to facilitate engineers to understand the abnormality and the underlying physics of the complicated monitoring output, a large-scale finite element method (FEM) model is developed to investigate the heat transfer behavior of the DMLS process and extract experimentally relevant thermal features. Specifically, a microscopic and a meso-level sub-model are initially developed to describe powder properties and the laser behaviors, respectively, and their outputs are directly incorporated in the experimental-scale FEM model. The FEM model-generated data are then processed to reproduce the long-wave infrared camera (LWIR) sensor outputs to relate the physical defects and the output thermal images.
[1] Liu, R., Wang, Z., Sparks, T., Liou, F., Newkirk, J., 2017. Aerospace applications of laser additive manufacturing, in: Laser Additive Manufacturing. Elsevier, pp. 351â371.
[2] Grünberger, T., Domröse, R., 2014. Optical in-process monitoring of direct metal laser sintering (DMLS): A revolutionary technology meets automated quality inspection. Laser Technik Journal11, 40â42.
[3] Gong, H., Rafi, K., Gu, H., Starr, T., Stucker, B., 2014. Analysis of defect generation in Tiâ6Alâ4Vparts made using powder bed fusion additive manufacturing processes. Additive Manufacturing1, 87â98.
[4] Scott, C.,2017.EOS introduces EOSTATE Exposure OT, First Commercial Optical Tomography System for Additive Manufacturing. https://3dprint.com/178624/eos-eostate-exposure-ot/(Accessed on 2020-07-19).