Thermo-Mechanical Analysis and Characterization of Wire Arc Additive Manufactured Components

Goka, Suresh and S, Suryakumar (2019) Thermo-Mechanical Analysis and Characterization of Wire Arc Additive Manufactured Components. PhD thesis, Indian institute of technology Hyderabad.

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Abstract

Mechanical components are typically isotropic when manufactured by traditional methods such as casting, forging, etc. However, complex geometries would be difficult with these methods. In order to fabricate the complex components, various methods have been suggested. One of such methodsis weld based additive manufacturing wherein welding is used to join the material selectively at the different locations. Mechanical tests are usually employed in investigational work in order to obtain information for use in design and manufacturing to ascertain whether the material meets the specifications for its intended use, to produce desired mechanical properties like hardness and tensile tests The intention of performing a simulation or numerical model is to predict the physical performance of an existing process. On the other hand, it may be essential to compromise the results in terms of accuracy, computational time of the model. The aim of the current work is to survey and develop a modeling method to simulate the deposition of a single straight bead and implementing the same towards constructing thin wall components using the finite element analysis. The simulating phenomenon is carried out numerically and followed by DFLUX subroutine. The model must be efficient and reliable enough to be functional in the designing and path planning of the fabricating features. In addition, a transient thermal distribution of deposited weld metal is modeled analytically in aspects of various heat sources. Importantly the heat distribution of the Goldak’s heat source is explored to improve the results of the experimental analysis. An attempt has been made to correlate the microstructural analysis with the modeling results. Hence the phase proportion, deformed shape, residual stresses, the microstructural analysis could be evaluated.

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IITH Creators:
IITH CreatorsORCiD
S, Suryakumarhttp://orcid.org/0000-0001-6015-7593
Item Type: Thesis (PhD)
Subjects: Others > Mechanics
Divisions: Department of Mechanical & Aerospace Engineering
Depositing User: Team Library
Date Deposited: 05 Feb 2019 05:15
Last Modified: 05 Feb 2019 05:15
URI: http://raiith.iith.ac.in/id/eprint/4791
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