Browsing RPI Theses Online (Complete) by Author "Samuel, Johnson"
Now showing items 1-20 of 47
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A micro-milling study of Al-4043 workpieces built using wire arc additive manufacturing (WAAM)
Gao, Zhongjia (Rensselaer Polytechnic Institute, Troy, NY, 2020-08)Wire arc additive manufacturing (WAAM) is a direct-energy deposition, metal additive manufacturing process. Due to the thermal cycling of the workpiece between deposited layers, microstructural variations exist, which are ... -
A new manufacturing process for biocomposite sandwich parts using a myceliated core, natural reinforcement and infused bioresin
Jiang, Lai (Rensselaer Polytechnic Institute, Troy, NY, 2015-12)Key aspects, process parameter effects and sensitivities and design models of the seven manufacturing steps were investigated and developed further. It was determined that the number of reinforcement plies should be ... -
Acoustic emission-based monitoring of manufacturing processes involving biomaterials
Mishra, Roshan (Rensselaer Polytechnic Institute, Troy, NY, 2020-08)Next, shear-based cutting of bovine bone is studied using single-tooth bone sawing experiments. More specifically, efforts are undertaken to model the acoustic emission signal power, as a function of the specific cortical ... -
Additive manufacturing of thermoplastic matrix composites using ultrasonics
Olson, Meghan (Rensselaer Polytechnic Institute, Troy, NY, 2015-08)To develop LUAM in a methodical manner with minimal risk, a staged approach was devised whereby coupon-level mechanical testing and prototyping utilizing existing equipment was accomplished. Four key tasks have been ... -
An innovation in manufacturing advanced composites : thermal press curing
Kuppers, Jaron David (Rensselaer Polytechnic Institute, Troy, NY, 2012-12) -
Anomalous mechanical behavior and crack growth of oxide glasses
Seaman, Jared Hilliard (Rensselaer Polytechnic Institute, Troy, NY, 2016-05)This thesis combines a number of studies that offer a new unified understanding of historical anomalous mechanical behaviors of glass. These anomalies are interpreted as simply the consequence of slow crack growth and ... -
Application of specialized elastomeric tooling for advanced e-beam cured composite structures
Rizzolo, Robert (Rensselaer Polytechnic Institute, Troy, NY, 2016-12)Unfortunately, embrittlement of the silicone mask was noticed during flat panel production, leading to a series of tests to determine the effect of EB irradiation on silicone mechanical properties. Using a constraining ... -
Cutting models for bio-composites
Potukuchi, Sri Krishna Sasidhar (Rensselaer Polytechnic Institute, Troy, NY, 2021-05)On the soft composite front, the cutting of single ply-reinforced hydrogels is investigated in a sensor-rich testbed comprising of both a load-cell, a submerged hydrophone, and a digital camera. The mapping between the ... -
Data-driven control of laser powder bed fusion
Shkoruta, Aleksandr (Rensselaer Polytechnic Institute, Troy, NY, 2021-08)There is growing attention to additive manufacturing (AM) processes in industry and academia. Specifically, one metal AM process - laser powder bed fusion (LPBF) - is particularly attractive as it can directly produce ... -
Data-driven strategies for control in additive manufacturing
Inyang-Udoh, Uduak (Rensselaer Polytechnic Institute, Troy, NY, 2021-12)Additive Manufacturing (AM) techniques are quickly becoming attractive for fabricating parts ranging from biological tissues to aircraft components. A key challenge in these techniques is controlling the quality of parts ... -
Decentralized control for cooperative load transport
Li, Jiawei (Rensselaer Polytechnic Institute, Troy, NY, 2021-08)Coordinated control of multiple robots has always been a popular topic in the robotics control field. The reason behind it is that a cooperative control strategy can easily overcome the limited capability of a single robot. ... -
Design and testing of an experimental ten-cell high temperature PEM fuel cell stack
Ziomek, William (Rensselaer Polytechnic Institute, Troy, NY, 2012-12) -
Designing 3D fiber reinforced hydrogels for in vitro cell studies
Williams, Ashok McLaurin (Rensselaer Polytechnic Institute, Troy, NY, 2019-05)The extracellular matrix (ECM) is known to play an important role in the health of cells and tissues. Not only are chemical signals transmitted via bonds and tightly controlled diffusion, but the structure of the ECM also ... -
Direct-writing of fiber networks for 3D printing soft composites
Spackman, Clayson (Rensselaer Polytechnic Institute, Troy, NY, 2016-12)Fiber-reinforced soft composites (FrSCs) are an emerging class of composites that are made up of polymeric fibers with specific material properties and hierarchical length-scales, embedded within another soft-polymer matrix. ... -
Effects of haversian and plexiform components on the machining of bovine cortical bone
Conward, Michael (Rensselaer Polytechnic Institute, Troy, NY, 2018-12)Next, a micro-scale orthogonal machining study is conducted to investigate the effect of age-dependent microstructural variations seen in bovine bone. The machining experiments are performed on three different age groups ... -
Electrochemical machining assisted using pulsed electric fields, ultrasonic motion, and magnetic fields
Bradley, Curtis (Rensselaer Polytechnic Institute, Troy, NY, 2018-08)The electrochemical machining study presented in this thesis uses the novel testbed to reveal that phase-controlled waveform interactions between the three assistances affect both the material removal rate (MRR) and surface ... -
Evaluation of micro-drilling technologies for metal injection molded 420 stainless steel
Silverman, David Elion (Rensselaer Polytechnic Institute, Troy, NY, 2015-08)Metal injection molded (MIM) 420 stainless steel is a commonly used material for high-value products such as fuel injector nozzles. However, the trade-offs involved in using different micro-drilling processes on this ... -
Expansion and refinement of out-of-autoclave curing/consolidation methods for advanced composites
Malek, Paul Vincent (Rensselaer Polytechnic Institute, Troy, NY, 2013-12)Specialized Elastomeric Tooling (SET) technology, a patented process, has been shown to effectively replicate properties of composite parts formed by autoclaving while reducing the necessary energy, cost and waste by orders ... -
Flow induced power generation from graphene
Dhiman, Prashant (Rensselaer Polytechnic Institute, Troy, NY, 2011-08) -
Graphene nano-devices and nano-composites for structural, thermal and sensing applications
Yavari, Fazel (Rensselaer Polytechnic Institute, Troy, NY, 2012-05)