Date of Award
12-2023
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Mechanical Engineering
Committee Chair/Advisor
Dr.Huijuan Zhao
Committee Member
Dr.Garrett Pataky
Committee Member
Dr.Fei Peng
Abstract
Laser sintering of ceramics plays a vital role in advanced additive manufacturing due to its precise fabrication of complex ceramic structures, localized heating and microstructural control. It allows the production of complex and customized ceramic parts for applications such as the aerospace industry and biomedical devices. However, due to the high thermal gradients produced during the process, laser sintering technology faces fundamental challenges, such as thermal stresses and crack formation. Establishing a valid numerical model to guide the ceramic laser sintering process, which predicts the thermal and mechanical behavior of the component, is necessary.
In this work, the modified Skorohod-Olevsky Viscous Sintering (mSOVS) model considering grain growth is adopted in the finite element analysis (FEA) to simulate the laser sintering process of alumina. The mSOVS model is implemented as a creep subroutine in the FEA software ABAQUS and validated under the conventional sintering condition. The grain growth model and material parameters in the mSOVS model have been systematically investigated under stationary laser sintering conditions. Under the moving laser condition, the role of laser scanning speed in the relative density, temperature, and stress distribution in the simulation domain is discussed.
This work will offer insight into optimizing sintering process parameters for future additive manufacturing of complex ceramics structures.
Recommended Citation
Sharma, Shardul, "Finite Element Analysis on Laser Sintering of Ceramic Materials" (2023). All Theses. 4399.
https://open.clemson.edu/all_theses/4399