Link to the University of Pittsburgh Homepage
Link to the University Library System Homepage Link to the Contact Us Form

Modeling Shape Distortion of 3-D Printed Aluminum Oxide Parts During Sintering

Cox, Nicholas (2018) Modeling Shape Distortion of 3-D Printed Aluminum Oxide Parts During Sintering. Master's Thesis, University of Pittsburgh. (Unpublished)

Download (1MB) | Preview


Ceramic parts have become increasingly valuable in many different engineering applications due
to their high melting point and other desirable mechanical properties. When manufacturing
ceramic parts with complicated geometries, 3-D printing has become a very useful production
method. When creating 3-D printed ceramic parts, producing the desired properties are based on
achieving the proper microstructure. After printing, the density of the part is low and the resulting
microstructure is inadequate for many engineering applications. To increase the density of the part,
and create the desired mechanical properties the part must be heat treated. This process is known
as sintering. Sintering entails heating a part, which has already been formed, so that densification
occurs [1]. During the sintering process, distortion and non-uniform densification occurs. This is
a result of non-uniform pore distribution throughout the material resulting in inhomogeneous
material density. Friction upon shrinkage and gravity also play roles in the non-uniform sintering
[2]. The prediction of non-uniform densification and distortion of the manufactured part is
essential to efficiently manufacture ceramic parts to a predetermined dimension. The objective of
this thesis is to generate techniques for modeling 3-D printed ceramics (Aluminum Oxide) during
the sintering process to accurately predict shrinkage and distortion. A continuum mechanics
approach was taken to create a constitutive model that describes the relationship between the stress
and strain tensor during the sintering process. The constitutive model was utilized in creating a
user subroutine (UMAT) to implement into the FEA program, Abaqus.


Social Networking:
Share |


Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Cox, Nicholasnac81@pitt.edunac810000-0002-0830-256X
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee MemberSlaughter, Williamwss@pitt.eduwss
Committee MemberNettleship, Iannettles@pitt.edunettles
Thesis AdvisorSchmidt, Daviddes53@pitt.edudes53
Date: 11 June 2018
Date Type: Publication
Defense Date: 10 January 2018
Approval Date: 11 June 2018
Submission Date: 3 March 2018
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 79
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: Sintering Simulation Ceramic Sintering Constitutive Model Sintering Simulation
Date Deposited: 11 Jun 2018 18:30
Last Modified: 11 Jun 2018 18:30


Monthly Views for the past 3 years

Plum Analytics

Actions (login required)

View Item View Item