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Full-Text Articles in Engineering

Helical Dielectric Elastomer Actuator, Daewon Kim Aug 2021

Helical Dielectric Elastomer Actuator, Daewon Kim

Publications

A helical dielectric elastomer actuator (HDEA) can include a first dielectric region comprising an elastomer defining a helix. In an example, a dielectric material can be deposited, and a compliant conductive material can be deposited, such as using an additive manufacturing approach, to provide an HDEA. In an example where the HDEA has multiple mechanical degrees of freedom, at least two compliant conductive regions can be located on a first surface of the first dielectric region and at least one compliant conductive region can be located on an opposite second surface of the first dielectric region. For such an example, …


Environmental Advantages In Additive Manufacturing, Analise Walter, Cheryl Marcham Jan 2020

Environmental Advantages In Additive Manufacturing, Analise Walter, Cheryl Marcham

Publications

Additive Manufacturing (AM) is a technology that uses a variety of methods to ultimately apply layers of material and create products (Ford & Despeisse, 2016; Ford, Mortara & Minshall, 2016). Although there has been an expansion in recent technology, AM has been used in manufacturing for a few decades (Ford, Mortara, et al., 2016). Since the late 1980s, AM has grown from simple product designs, with a focus on prototyping and customization, to modern times with billions of dollars in revenue and large-scale production of consumer and industrial products (Cotteleer, 2014). Forecasts showed a near $10 billion market by 2020, …


Highly Vented Truss Wall Honeycomb Structures, David J. Sypeck Dec 2017

Highly Vented Truss Wall Honeycomb Structures, David J. Sypeck

Publications

A vented honeycomb structure with a plurality of honey­comb cells arranged in a hierarchical order and having a plurality of truss walls, each truss wall including a plurality of members. The vented honeycomb structure is fabricated by joining a plurality of sheets of trusses using any one of an expansion, a corrugation, and a slotting process. Fabri­cation can also occur by deposition, casting, additive, extru­sion, or aligning and joining methods. The honeycomb cells, truss walls, truss wall openings, and truss wall members can be functionally graded.


Optimizing Jets For Wake Control Of Ground Vehicles, Domenic Barsotti, Sandra Boetcher Mar 2017

Optimizing Jets For Wake Control Of Ground Vehicles, Domenic Barsotti, Sandra Boetcher

Publications

A system of wake control for a ground vehicle to help promote increased fuel efficiencies of the ground vehicle by modifying an air flow wake generated during the movement of the vehicle in a forward direction. The system includes at least one slot jet configured to be located along a rear profile portion of the ground vehicle. The at least one slot jet is configured to provide a continuous flow of air at a non-zero velocity when the ground vehicle is moving in a forward direction, the non-zero velocity being at least partially directed in a rearward direction with an …


Trustworthiness Requirements For Manufacturing Cyber-Physical Systems, Radu F. Babiceanu, Remzi Seker Jan 2017

Trustworthiness Requirements For Manufacturing Cyber-Physical Systems, Radu F. Babiceanu, Remzi Seker

Publications

Distributed manufacturing operations include cyber-physical systems vulnerable to cyber-attacks. Long time not considered a priority, cybersecurity jumped to the forefront of manufacturing concerns due to the need to network together legacy, newer equipment, and entire operation centers. This paper proposes trustworthiness solutions for integrated manufacturing physical-cyber worlds, where trustworthiness is defined to complement system dependability requirements with cybersecurity requirements, such that the resulting manufacturing cyber-physical system delivers services that can justifiably be trusted. Acknowledging the inevitability of cyber-attacks, the paper models the cybersecurity component using the resilient systems framework, where system resilience is viewed as preservation of a required state …


Running With The Pack: Jit & Automation For Small Manufacturers, Thomas E. Phillips, John R. Ledgerwood Jun 1994

Running With The Pack: Jit & Automation For Small Manufacturers, Thomas E. Phillips, John R. Ledgerwood

Publications

While both just in time (JIT) concepts and automation programs have been widely implemented and highly successful in large manufacturing companies, many smaller manufacturing companies have wondered whether it would be economically feasible to utilize these same techniques and derive these same benefits. When JIT is adopted by small manufacturers, it provides them with advantages over traditional manufacturing systems, such as lower cost, quality improvements, higher productivity, and less working capital tied up in inventory. Small US manufacturers must understand the basic principles and philosophy of JIT and update their production equipment if they are to be competitive in today's …