Thermo-mechanical stress relief analysis in PMMA and 6000 series aluminum
Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014.
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
| Published: |
Massachusetts Institute of Technology
2014
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/1721.1/89983 |
| _version_ | 1811079286809952256 |
|---|---|
| author | Stephens, Scott, S.B. (Scott A.). Massachusetts Institute of Technology |
| author2 | Thomas W. Eagar. |
| author_facet | Thomas W. Eagar. Stephens, Scott, S.B. (Scott A.). Massachusetts Institute of Technology |
| author_sort | Stephens, Scott, S.B. (Scott A.). Massachusetts Institute of Technology |
| collection | MIT |
| description | Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014. |
| first_indexed | 2024-09-23T11:12:48Z |
| format | Thesis |
| id | mit-1721.1/89983 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T11:12:48Z |
| publishDate | 2014 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/899832019-04-10T21:59:06Z Thermo-mechanical stress relief analysis in PMMA and 6000 series aluminum Thermo-mechanical stress relief analysis in polymethyl methacrylate and 6000 series aluminum Stephens, Scott, S.B. (Scott A.). Massachusetts Institute of Technology Thomas W. Eagar. Massachusetts Institute of Technology. Department of Materials Science and Engineering. Massachusetts Institute of Technology. Department of Materials Science and Engineering. Materials Science and Engineering. Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014. Cataloged from PDF version of thesis. Includes bibliographical references (page 32). Stress relief of materials produced in bulk is a key part of the manufacturing process. The most common kinds are either thermal or mechanical and are commonly applied to commercial metal alloys. A third type, thermo-mechanical, utilizes thermal gradients to induce residual stresses of an equal and opposite nature to balance compressive and tensile stresses existing in the material after solutionizing. The experiment detailed in this work shows the effect of thermal gradients on residual stresses in polymethyl methacrylate (PMMA). A downhill quench from 95 C to 15C is able to create a deflection of 2.36 millimeters, evidence of residual stress. A subsequent uphill quench from -40 to 100 degrees reduced the deflection by 37 percent. The finite element simulation of a 6000 series aluminum block verifies that under properly controlled processing parameters, it is possible to induce opposite stresses to relieve residual stresses in a quenched material. Additional limitations to the uphill quench technique are detailed in the following work so that thermo-mechanical stress relief may be properly applied to a range of materials. by Scott Stephens. S.B. 2014-09-19T21:32:34Z 2014-09-19T21:32:34Z 2014 2014 Thesis http://hdl.handle.net/1721.1/89983 890130176 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 33 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Materials Science and Engineering. Stephens, Scott, S.B. (Scott A.). Massachusetts Institute of Technology Thermo-mechanical stress relief analysis in PMMA and 6000 series aluminum |
| title | Thermo-mechanical stress relief analysis in PMMA and 6000 series aluminum |
| title_full | Thermo-mechanical stress relief analysis in PMMA and 6000 series aluminum |
| title_fullStr | Thermo-mechanical stress relief analysis in PMMA and 6000 series aluminum |
| title_full_unstemmed | Thermo-mechanical stress relief analysis in PMMA and 6000 series aluminum |
| title_short | Thermo-mechanical stress relief analysis in PMMA and 6000 series aluminum |
| title_sort | thermo mechanical stress relief analysis in pmma and 6000 series aluminum |
| topic | Materials Science and Engineering. |
| url | http://hdl.handle.net/1721.1/89983 |
| work_keys_str_mv | AT stephensscottsbscottamassachusettsinstituteoftechnology thermomechanicalstressreliefanalysisinpmmaand6000seriesaluminum AT stephensscottsbscottamassachusettsinstituteoftechnology thermomechanicalstressreliefanalysisinpolymethylmethacrylateand6000seriesaluminum |