Dynamic response of 3D printed beams with damping layers

3D printers are a relatively new technology and they could be used in the future to 3D print structural components in buildings or bridges. The main advantages of using 3D printing would be the optimization of the structures. Effectively, with 3D printers, it is possible to generate polymers with different strengths and stiffnesses in the same structure. It is also possible to print very complex shapes and forms. This thesis will focuses on the dynamic response of 3D printed beams with damping layers. More precisely, natural frequency and damping ratio will be analysed in order to find the optimal location of the damping layers. For this experiment, three methods are used, one with an accelerometer, one with a high speed camera and one with a piezoelectric actuator. Characterization of the 3D printed material has been made to predict results. For the results, it is possible to conclude that using softer material as damping layer reduces the beam frequencies but increases the damping ratio. Also, in order to get the most efficient beam in terms of damping properties, the damping layers need to be close to the top and bottom surfaces as strains are larger. Finally, it can be say that a high speed camera is the best device to investigate the dynamic response of 3D printed materials.

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Civil and Environmental Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2015

Author dc:creator

• Vachon, Maryse

Advisor dc:contributor.advisor

• Markus J. Buehler.

• Civil and Environmental Engineering.

Statement dc:rights

• 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.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/99629

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/99629