3^rd International Conference on 3D Printing Technology and Innovations March 25-26, 2019 at Hotel Holiday Inn Rome - Aurelia, Italy

Biography:

Arnautov A is now at the completion of his PhD from the research group of Prof. Dr.-Ing. Alexander Gromov, NUST “MISiS” University, Moscow. He is the Head of the Department at RUSAL Co., a premier research organization. He has published more than 10 papers in reputed journals and conference proceeding on additive manufacturing.

Abstract:

3D printed aluminum details are lightweight (density 2700 kg/m³) and moldable, having an elasticity modulus of ~70 MPa. These are the main requirements of the 3D printing industry. However, aluminum is not strong or hard enough: the tensile strength even for the duralumin alloy is ~500 MPa, and its hardness HB sits at 20 kgf/mm². The developed modifying precursors for aluminum matrix composites (AMC), based on aluminum nitrides and oxides obtained through combustion or hydrothermal/dry Al oxidation, have become the basis of the new composite. We develop a technology to strengthen the AMC obtained by 3D printing, and we have obtained innovative precursor-modifiers. Combustion or oxidation products - aluminum nitrides and oxides - are specifically prepared for sintering branched surfaces with transition nanolayers formed between the particles. It is the special properties and structure of the surface that allows the particles to be firmly attached to the aluminum matrix and, as a result, increase the strength of the obtained composites.

Biography:

Krzysztof Kanawka, PhD DIC, serves as CEO of a Polish space sector company Blue Dot Solutions. The company is active in fields such as practical use of satellite data, space markets (especially in Europe) and mechanical engineering. In the past Krzysztof Kanawka studied at the Department of Chemical Engineering at Imperial College London, where he did PhD in the field of (cermet) Solid Oxide Fuel Cells.

Abstract:

This abstract summarises the project named “Development of a multifunctional case for aerospace electronics, which special focus on power electronics and power supply”. This project was realised by the Blue Dot Solutions company and co-financed by the (Polish) National Research And Development Centre.

Several different types of lattice materials fabricated via the SLS method were designed and examined. Initially, these structures were simulated, a then were sintered via the SLS method. The material used for this project was “Alumide”, whic is a 7:3 mix of PA12 polyamid and aluminium. The main properties of this metallic-looking material are: high stiffness and very good characteristics for post-processing. Pieces of Alumide materials can undergo various post- treatment techniques, such as sanding, polishing or grinding.

Studies and numerical simulations were done on several basic isotropic cells. Five of them were analysed further: 1e, 1f, 1h, 2b, 5 (il. 1).         

The goal of the analisis was to determine the equivalent of thickness in dependence to structure of a single cell. The numerical analysis was done for thermal and thermodynamical cases (il. 2).

Biography:

Sahar Sultan is a third year PhD student in Stockholm University. She is actively working with 3D printing of cellulose nanoparticles. She has also served industry for 5 years by working as a researcher and safety officer in a solar cell company called Exeger Sweden AB.

Abstract:

Nanocellulose extracted from natural resources are used extensively in biomedical field. They have properties of cellulose, such as potential for chemical modification, low toxicity, biocompatibility, biodegradability, low toxicity, high mechanical properties, renewability as well as nanoscale characteristics like high specific surface area, rheological and optical properties. Due to the inherent shear thinning property of nanocellulose, the 3-Dimensional (3D) printing technique has revolutionized the bioscaffolds with customization, complex geometries, controlled porosity, bioprinting and hierarchical features, in terms of composition  and structural designs. Furthermore, during 3D printing the high aspect ratio of cellulose nanocrystals (CNCs) is expected to induce shear alignment yielding directionality in the 3D printed scaffolds. CNCs based double crosslinked interpenetrating polymer network (IPN) hydrogel has been made and 3D printed into 2D and 3D scaffolds with uniform and gradient porosity. The pore sizes are in the range of 80-2080 µm and 195-2382 µm in the wet and freeze-dried states respectively. These pores are distributed in a controlled manner that in turn provides gradation in density and porosity of the 3D printed hydrogel scaffolds. The directionality studies showed that CNCs tend to align parallel to the printing direction and degree of orientation varies between 61-76 %, depending on the point of measurement within the 3D printed scaffolds. In addition, this study also highlights the importance of nozzle movement during 3D printing to achieve scaffolds with better resolution, higher dimensions and good shape fidelity. The alignment of nanocrystals in this work yields directionality that can serve as an important step toward the development of tailored architectures. This study demonstrates the potential of 3D printing in developing bio-based scaffolds with controlled pore sizes, gradient pore structures and customized geometry for optimal tissue regeneration applications.

Biography:

Seong-Woo Woo has a BS and MS in Mechanical Engineering, and he has obtained PhD in Mechanical Engineering from Texas A&M University. He major in energy system such as HVAC and its heat transfer, optimal design and control of refrigerator, reliability design of thermal components, and failure Analysis of thermal components in marketplace using the non-destructive such as SEM & X-ray. He worked in Agency for Defense Development, Chinhae, South Korea, where he was Researcher in Charge of Development of Naval Weapon System. Now he is working as a Senior Reliability Engineer in Side-by-Side Refrigerator Division, Digital Appliance, Samsung Electronics, and focus on enhancing the life of refrigerator as using the accelerating life testing. He also has experience about side-by-side refrigerator design for best buy, Lowe’s, cabinet-depth refrigerator design for general electrics.

Abstract:

The basic reliability concepts - parametric ALT plan, failure mechanism and design, acceleration factor, and sample size equation were used in the development of a parametric accelerated life testing method to assess the reliability quantitative test specifications (RQ) of mechanical systems subjected to repetitive stresses. To calculate the accelerâ–ºation factor of the mechanical system, a generalized life-stress failure model with a new effort concept was derived and recommended. The new sample size equation with the acceleration factor also enabled the parametric ALT to quickly evaluate the expected lifetime. This new parametric ALT should help an engineer uncover the design parameters affecting reliability during the design process of the mechanical system. Consequently, it should help companies improve product reliability and avoid recalls due to the product failures in the field. As the improper design parameters in the design phase are experimentally identified by this new reliability design method and recent patents are addressed, the mechanical system should improve in reliability as measured by the increase in lifetime, LB, and the reduction in failure rate, l.

Biography:

Farhang Momeni received his BS in Aerospace Engineering from the Sharif University of Technology in 2014. He finished his BS in three years rather than the usual four years (Sep 2011-Sep 2014), while he was ranked 1^st among all B.S. students in Aerospace Engineering at the Sharif University of Technology that graduated in 2014. He published two journal articles in Thermodynamics before his B.S. graduation date. Then, in 2015, he received Direct Ph.D. admission with fellowship award from the Mechanical Engineering department at the University of Michigan-Ann Arbor, where he obtained his M.S. and Ph.D. in 2017 and 2018, respectively.

Abstract:

3D printing is a relatively known manufacturing process and the inimitable features provided by 3D printing (such as complexity-free geometry and material saving) are also well-known. Similarly, 4D printing should be explicitly underpinned as a novel manufacturing technology and the unique traits empowered by 4D printing should be elucidated too. 4D printing was initially defined as a combination of shape memory materials and additive manufacturing. In our recent review paper, I illustrated the differences between 3D and 4D printing. In addition to smart (not necessarily shape memory) materials and additive manufacturing, “4D printing mathematics” is also required to yield a “4D printed” structure. Furthermore, unlike 3D printers, 4D printers are not available and the 4D printing process is currently accomplished by existing 3D printers in a passive manner. The phrase “4D printer” was used in the related literature. However, I need to clarify that; “4D printer” is not truly established by converting a single-material printer into a multi-material printer, or by incorporating different additive manufacturing methods into one printer. I should add that a “4D printer” must be capable of investigating and predicting the “4^th D”. Consequently, an “intelligent head” should be constructed and integrated with present multi-material printers. In this plenary talk, I will underpin 4D printing as a novel manufacturing paradigm, illuminate its unique features, and particularly prove its energy-saving feature by deriving its minimum energy consumption limit. Finally, I will embody future 4D printers and their connections to our laws of 4D printing.