Mechanical properties comparison of strut-based and TPMS lattice structures produced by EBM

Download

Master_Thesis_Baris_Sokollu.pdf

Date

2022-4-28

Author

Sokollu, Barış

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

468
views

1808
downloads

Additive manufacturing is a relatively old but rapidly emerging innovative technology that enables various shapes and designs to be realized which are almost not possible with conventional manufacturing. Lattice structures are one of the most unique applications of utilizing additive manufacturing technology due to weight-to-strength ratios they offer, high impact absorption capabilities, and difficult to produce with conventional approaches. Studies in the literature are mainly focusing on the strut-based crystal-like structures i.e., Body-Centered Cubic (BCC) and Face-Centered Cubic (FCC) while fewer studies examine the Triply Periodic Minimal Surface (TPMS) topologies. Although there are several works showing the mechanical properties of these topologies individually, there is a lack of comparative study in the literature. In this thesis work, comparative investigation of mechanical responses of five different lattice topologies which are BCC, FCC, Gyorid, Primitive, and Diamond under tension and compression loads is aimed. Scope of the thesis is specified as powder removal study, production of test samples made by Ti6Al4V, Scanning Electron Microscope (SEM) imaging prior to experiments, conducting tension and compression testing considering available standards, comparison of compression results with Gibson-Ashby theoretical model, investigation of microstructures from fracture surfaces, and finite element analysis (FEA) verification by the test results.

Subject Keywords

Additive manufacturing, Lattice structures, Triply periodic minimal surfaces, Electron beam melting, Ti6Al4V

URI

https://hdl.handle.net/11511/97320

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Simulator of an additive and subtractive type of hybrid manufacturing system Dilberoğlu, Mecid Uğur; Yaman, Ulaş; Dölen, Melik (2019-06-24) Additive Manufacturing (AM) facilitates the production of intricate objects despite its weakness in attainable part quality and fabrication speed compared to the conventional manufacturing methods. To alleviate the problems arising as a natural outcome of AM methods, hybrid technologies become viable options by employing concurrent manufacturing procedures, e.g. synergetic additive and subtractive manufacturing (SM) actions. Hybrid workstations have recently opened up new dimensions to 3D-printing industry,...
IMPACT ABSORBING LATTICE STRUCTURES PRODUCED BY ADDITIVE MANUFACTURING Neshani, Roozbeh; Özerinç, Sezer; Department of Mechanical Engineering (2022-1-10) Recent technological advances rendered additive manufacturing (AM) a disruptive technology for the development and manufacturing of next generation complex parts and lightweight structures. AM of polymeric parts is widely applicable to structural parts ranging from load bearing components to impact absorbing structures. Digital Light Synthesis (DLS) is a recently developed technique that enables the reliable, fast and accurate AM of a wide range of polymeric materials. DLS is especially effective in produci...
Multilayer graphene growth on polar dielectric substrates using chemical vapour deposition KARAMAT, SHUMAİLA; Celik, K.; Zaman, S. Shah; Oral, Ahmet (Elsevier BV, 2018-06-01) High quality of graphene is necessary for its applications at industrial scale production. The most convenient way is its direct growth on dielectrics which avoid the transfer route of graphene from metal to dielectric substrate usually followed by graphene community. The choice of a suitable dielectric for the gate material which can replace silicon dioxide (SiO2) is in high demand. Various properties like permittivity, thermodynamic stability, film morphology, interface quality, bandgap and band alignment...
Techno-economic optimization of induction machines: an industrial application Samarkanov, Dmitry; Gillon, Frederic; Brochet, Pascal; Laloy, Daniel (2011-09-10) Current economic situation force manufacturers to find the new ways of designing electrical machines. In order to succeed in competitive market, industry has to create new approaches of finding the solutions which will satisfy customer's requirements. Task of determining this set of optimal configurations must be done in the least possible time frame. This problem is becoming more complex when the required electrical machine is not in the standard range of configurations and so the price of the solution can...
Mechanical characterization of additively manufactured Ti-6Al-4V aircraft structural components produced by electron beam melting Yılmaz, Fatih; Şahin, Melin; Gürses, Ercan; Department of Aerospace Engineering (2022-8-25) Weight reduction of structural parts is one of the most important efforts of design and analysis studies to improve fuel efficiency and flight performance of aerospace vehicles through topology optimization creating complex geometric designs that are lighter but cannot be produced via conventional manufacturing methods. Instead, the manufacturing of the resulting designs is possible with additive manufacturing methods where the final product is obtained by adding layer upon layer to obtain close to the near...

Citation Formats

B. Sokollu, “Mechanical properties comparison of strut-based and TPMS lattice structures produced by EBM,” M.S. - Master of Science, Middle East Technical University, 2022.