Our April 2018 technical meeting was held on April 11, 2018 at Riccardo's by the Bridge. We thank our members who were able to attend, our partner organizations for helping make the evening a success, and the students who shared their interesting research with us.
Student Papers Night
Students from Stevens Institute of Technology, SUNY Maritime College, the U.S. Merchant Marine Academy, and Webb Institute.
- Material Considerations in Fused Filament Fabrication
MIDN Ryan Dix, United States Merchant Marine Academy
Fused Filament Fabrication (FFF) technology is the most accessible form of Additive Manufacturing (AM) (3D printing), and represents the majority of 3D printing worldwide. The technology is ideal for use at sea due to a small learning curve, low machine procurement cost, and low material cost. Despite widespread use, little is known of the material properties of FFF printed components. One difficulty in gathering material data is the amount of control the FFF process offers over component fabrication. These variables affect multiple facets of the AM process including internal structures, which produce semi-hollow interior. The amount of variation requires specific testing to ensure efficient engineering of functional FFF components. Another difficulty is the lack of these standards specifically surrounding FFF, governing material testing, component design, and printing procedures. By using established American Society for Testing and Materials (ASTM) polymer - but not AM polymer - standards, data for the most common structural variations of FFF is collected and used to derive three semi-empirical formula to predict component performance in essential material characteristics: ultimate strength, yield strength, and modulus of elasticity.
- Nano-composites for Ballast and Drinking Water Treatment
MIDN Adam Fisher, United States Merchant Marine Academy
A nanocomposite made up of activated carbon particles with attached silver and magnetite nanoparticles has shown great potential for use in ballast and drinking water treatment. This nanocomposite allows for the elimination of chlorinated drinking water, which is known to have carcinogen by-products of chlorine. It also allows for the elimination of filtration, as a magnet is used to remove the composite and any pollutants that the activated carbon has adsorbed. For ballast water treatment, the composite is able to kill all microorganisms in the ballast water with no residual chemicals being introduced to the water, while being reusable, cheap, and unaffected by suspended sediment in the ballast water.
(No recording available)
- Feasibility of S.S. Phoenix Floating Dormitory
Allison Waters, Gene Han, Haines Duff, McKenzie Kingsbury, Stevens Institute of Technology
This exciting advancement at Stevens Institute of Technology causing a mounting issue: the university is rapidly running out of space to expand for its ever-growing incoming classes. The team’s proposed solution is to take advantage of the unique location upon the Hudson River by implementing a new and exciting floating residence hall, the S.S. Phoenix, for Stevens’ students. The S.S. Phoenix aims to supply Stevens with the extra space for dorm-style rooms while giving the university a novel appeal that can be easily marketed to prospective students. Based upon the owner’s requirements, we compiled a shortlist of vessels as the top contenders to become the S.S. Phoenix: a retired navy frigate, a deck barge with a modular residential superstructure, and a decommissioned cruise ship. The study presents cost analysis, feasibility, experimental and computational studies on mooring loads
- SMART Personal Floatation Device
Julian Fraise and Kevin Raleigh, Stevens Institute of Technology
The personal flotation device (PFD) has remained largely unchanged in recent history. PFDs have been left behind by the technology that has advanced almost all other human products. The inflatable PFD was a large step forward and helped reduce the bulkiness of the device when not in use. However even the most expensive inflatable products have inherent flaws that are causing users not to wear their PFDs in many situations. This research set out to develop a personal flotation device, which competes with the current market products by incorporating electronic subsystems in such a way that the device will be capable of adapting to changing environments and situations. The distinguishing features of this new design include a user suppression option for inflation when in the water, as well as individually controlled air compartments to improve the righting abilities of the device. The electronics applied to the design have the ability to track user depth and orientation in real time. Full scale prototype testing has been carried out to evaluate the effects of staggered inflation patterns between air bladders, and confirm the ability of the device to activate automatically given a specified depth and time.
- An Investigation of Turbulence Stimulation on Propellers
Nicholas Husser, Webb Institute
In this paper, the feasibility of experimentally testing 3D printed propellers was investigated at Reynolds numbers where scale effects were significant. Hama strips were printed on the leading edge of a B-series model propeller’s blades and open water tests were performed with both naked (unstimulated) and stimulated propellers for . Two effects were studied, the first being the effect of the 3D printed material on propeller hydrodynamics at model scale by comparing test results from the naked propeller tests to the original B-series tests at the Netherlands Ship Model Basin (NSMB). Second, the effects of Hama strips on the propeller model test results are studied through comparison of naked and stimulated results at the same test conditions. Finally, the feasibility of the implementation of turbulence stimulators for model propeller testing is discussed.
Photographs from the meeting can be found below. Recording of the presentations will be available on IMarEST TV and the IMarEST's public YouTube channel, where possible, and links can be found with the presentation descriptions above.