Investigation of the mechanical properties of 3D printed structures of Objet and DLP.

Schlepers, Mathijs (2014) Investigation of the mechanical properties of 3D printed structures of Objet and DLP.

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Abstract:The currunt solution for building transducers is done with MEMS technology (microelectromechanical systems). The building process is complex and generally takes a lot of time. It is therefore not possible to completely design and build a MEMS device at short notice. To increase the throughput of the process 3D printing might be used. This research is focussed on the investigation of the mechanical properties of 3D printed parts from Objet and DLP, printed as small as possible, in order to investigate the usability of 3D printed struc- tures. Test structures designed in Solid Works were printed with Objet and DLP printers. These designs were characterised with respect to minimum block size, accuracy, Young's Modulus and Shear Modulus of the printed structures. The minimum block size and accuracy are measured with an optical micro-scope. The Young's Modulus is measured dynamically and statically and the Shear Modulus only statically. It was possible to measure all quantities. Only the dynamically and statically measured Young's Modulus results showed large deviations. This was due to a large error made in the static measurements. The minimum block size ranges between 150�m and 500�m for DLP and 250�m and 300�m for Objet printed structures. The accuracy achieved for the DLP was the best in the xy-plane. The accuracy for the Objet printer was approximately the same in all planes due to the use of support material. The Young's Mod- ulus and Shear Modulus of the Objet printed items where max 2.5�0:15 GPa and 0.24�0:018 GPa and for the DLP 1.1�0:06 GPa and 0.012�0:001 GPa. Also some anisotropy was observed; the Young's Modulus was the highest in the xy-plane and the smallest in the z direction. With those indicated Young's Modulus and Shear Modulus known it is possible to design transducers. The minimum block size and accuracy are still to high to reach the same accuracy as MEMS technology, however it is possible to build transducers at an bigger size, furthermore it is possible to increase the manufacturing process of transducers with 3D print technolgy.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:53 electrotechnology
Programme:Advanced Technology BSc (50002)
Link to this item:http://purl.utwente.nl/essays/65574
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