MIT Department: Mechanical Engineering
Undergraduate Institution: University of Puerto Rico, Mayaguez
Faculty Mentor: Douglas Hart
Research Supervisor: Matthew Pearlson
I am a Fifth year Mechanical Engineering undergraduate at the University of Puerto Rico, Mayagüez. I am interested in the development of novel materials for renewable energy applications and sustainable integrated systems. My long term goals extend to obtain a PhD in Mechanical Engineering, with an entrepreneurial focus to support accessible and feasible solutions for undeveloped countries. During my free time I enjoy to surround my self with art; I like to go museum hoping, reading and I am fond of evening runs.
2018 Research Abstract
3D Printed Graphene: Faster, Lighter, and Cheaper
Jemaris Martes1, Zhao Qin2 and Matthew Pearlson3
1Department of Mechanical Engineering, University of Puerto Rico, Mayagüez
2Department of Civil and Environmental Engineering, Massachusetts Institute of Technology
3Department of Mechanical Engineering, Massachusetts Institute of Technology
Graphene is known for its outstanding mechanical properties. Additional characteristics of this material include a large surface area and atomic thickness. Because there are limitations in utilizing graphene monolayers for specific mechanical purposes, there has been recent development of modeling and fabrication methods to generate three-dimensional (3D) graphene-based open-cell foams with a gyroidal geometry. Gyroids, triply periodic minimal surfaces, allow graphene sheets to form a 3D porous structure with light-weight and high mechanical strength. Previous results have demonstrated that the mechanical properties of these structures are more dependent on the architectural features than on the mechanics of its constituent materials. However, its mechanical properties decrease with density at a higher rate than other polymeric foams. We combine design software, topology optimization and vat photopolymerization stereolithography (SLA) to fabricate and characterize 3D gyroidal structures made of closed-cell foam. Our study shows that dimensionally accurate and ultra-high definition open-cell foam gyroids can be produced from closed-cell foam. Mechanical characterization tests indicate that structures with relative densities (ρ*/ρ2) down to 0.16 can maintain up to 30% of the prime material’s ultimate strength. Such strong and light-weight structures could play a significant role in fuel reduction for the automotive and aerospace industries.