Browse Topic: Rapid prototyping
ABSTRACT Considering the growth of unmanned vehicles in Defense and Government applications, a simple and efficient way to design, develop and deploy trusted and secure systems is imperative. Secmation’s SecMUAS brings a platform for the rapid design and development of secure modular unmanned systems to defense applications and beyond. SecMUAS “bakes in” cybersecurity features using a modular design framework for unmanned systems. SecMUAS enables affordable, high assurance, “future-proof” solutions to rapidly transition from design to operational use. Secmation’s SecMUAS hardware and software will provide developers a capability to address cybersecurity requirements and related certification approval processes, enabling the rapid transition of technology to the warfighter. Citation: H. Aldridge, F. Livingston, “Secure Rapid Prototyping for Unmanned Systems”, In Proceedings of the Ground Vehicle Systems Engineering and Technology Symposium (GVSETS), NDIA, Novi, MI, Aug. 10-12, 2021
ABSTRACT Today’s combat vehicle designs are largely constrained by traditional manufacturing processes, such as machining, welding, casting, and forging. Recent advancements in 3D-Printing technology offer tremendous potential to provide economical, optimized components by eliminating fundamental process limitations. The ability to re-design suitable components for 3D-printing has potential to significantly reduce cost, weight, and lead-time in a variety of Defense & Aerospace applications. 3D-printing will not completely replace traditional processes, but instead represents a new tool in our toolbox - from both a design and a manufacturing standpoint
ABSTRACT This paper describes multi-resolution, distributed design and simulation software for rapid prototyping and analysis of complex systems using a Co-simulation approach. The current focus of this work is on the modeling of the engine cooling system in the Ford Escape Hybrid SUV vehicle. In that particular vehicle the cooling system consists of three coupled subsystems: a) engine cooling; b) electronic transaxle cooling; and battery cooling. This paper discusses two aspects of this work: a) high level description of the developed models and co-simulation approaches; and b) comparison of co-simulation to test data. Most of the model predictions deviated from the test data by less than 5%. Results indicate that distributed multi-resolution simulations can significantly accelerate the analysis of flow-thermal processes in complex vehicle systems. Moreover, the approach allows coupling of different codes with different functionalities to obtain integrated results not possible with
ABSTRACT This paper presents a flexible, modular model architecture in Modelica for system modeling and simulation of military ground vehicles. The model platform and implemented interfaces are flexible enough to support virtual prototyping of conventional and hybrid vehicles with various physical architectures such as series, parallel, hydraulic, and plug-in implementations. Several sample model implementations of conventional and concept hybrid military ground vehicles are presented to illustrate the usage and flexibility of the model architecture to support systems engineering activities by maximizing model re-use throughout the product development process from concept assessment and design through testing and verification
A digital twin is a virtual model that accurately imitates a physical asset. This can be as complex as an entire vehicle, a subsystem, and down to a small functioning component. The digital twin has a level of fidelity that aligns to the goals of the project team. The usage of a digital twin inside a digital engineering (DE) ecosystem permits architecture and design decisions for optimized product behavior, performance, and interactions. This paper demonstrates a methodology to incorporate the digital twin concept from requirement analysis, low fidelity feature level simulation, rapid prototypes running inside a System Integration Lab, and high fidelity virtual prototypes executing in an entirely virtual environment
The Software Production Factory (SPF) is a cyber physical construct of computers, hardware and software integrated together to serve as an ideation and rapid prototyping environment. SPF is a virtual dynamic environment to analyze requirements, architecture, and design, assess trade-offs, test Ground Vehicle development artifacts such as structural and behavioral features, and deploy system artifacts and operational qualifications. SPF is utilized during the product development as well as during system operations and support. The white paper describes the components of the SPF to build relevant Ground Vehicle Rapid Prototyping (GVRP) models in accordance with the model-centric digital engineering process guidelines. The factory and the processes together ensure that the artifacts are produced as specified. The processes are centered around building, maintaining, and tracing single source of information from source all the way to final atomic element of the built system
Tohoku University Sendai, Japan
Additive manufacturing (AM) is a common way to make things faster in manufacturing era today. A mix of polypropylene (PP) and carbon fiber (CF) blended filament is strong and bonded well. Fused deposition modeling (FDM) is a common way to make things. For this research, made the test samples using a mix of PP and CF filament through FDM printer by varying infill speed of 40 meters per sec 50 meters per sec and 60 meters per sec in sequence. The tested these samples on a tribometer testing machine that slides them against a surface with different forces (from 5 to 20 N) and speeds (from 1 to 4 meters per sec). The findings of the study revealed a consistent linear increase in both wear rate and coefficient of friction across every sample analyzed. Nevertheless, noteworthy variations emerged when evaluating the samples subjected to the 40m/s infill speed test. Specifically, these particular samples exhibited notably lower wear rates and coefficients of friction compared to the remaining
This article explores the impact of As-built versus annealed Fused Deposition Modeling (FDM) on the mechanical properties of test samples fabricated from two distinct materials: Polyamide 6 (PA6) and PA6 with carbon fiber filament. Employing the FDM technique, these samples were meticulously produced, with significant process parameters maintained at optimal values. Two sets of printed specimens were prepared for examination, one composed of PA6 and the other of PA6 with carbon fiber (CF) reinforcement. The first set was subjected to mechanical testing in its As-built condition, while the second set underwent an annealing process utilizing a muffle furnace. The annealing reduces internal stresses, enhances interlayer adhesion, and promotes crystallinity. For both the sent samples exposed to comprehensive assessments to evaluate various mechanical performance attributes, including hardness, impact strength, tensile strength and flexural strength. The results of this study elucidate that
Purdue University researchers have developed a patent-pending method to add particles to filament and disperse them evenly through a traditional fused deposition modeling, or FDM, 3D printer, which will aid industry in manufacturing functional parts
Additive manufacturing produces parts by adding material layer by layer with respect to time based on a computerized 3D solid model. The design model of Robotic arm was prepared using the solid works. The various components such as fingers, gripper, etc., were created and connected. After meticulous mathematical calculations, the design features of the robotic arm, including force analysis, are arrived at, and the arm is prepared to be operated using Bluetooth. Major challenges were faced during conversion of the designed model to prototype model. Furthermore, the components were created utilising fast rapid prototyping, which is more efficient than other traditional approaches. This technology has been effectively used in the production of light weight prototypes, tooling and the development low-cost bespoke designs. Finally, all the parts are assembled with Bluetooth control systems and validated with payload up to maximum of 10kgfor lowering and lifting
Avoiding the pitfalls of 3D printing requires knowing the process limitations - and how to work around them. An expert at a leading AM specialist shares insights on getting it right. As additive manufacturing (AM) technology and its applications expand, engineers are recognizing that different industrial 3D printing processes have different constraints that can affect designed parts in production. Some constraints are universal across the different processes, and some are more specific to the type of process used. It is thus essential to understand the technology you are working with to maximize its potential as a production method. With this understanding it is possible to design around the general limitations of AM as well as the specific process constraints that could impact a product or part. While design for manufacture (DfM) is not a new concept, the rules for designing for additive manufacture (DfAM) require design engineers to take a different approach. This article is
Engineers have created a highly effective way to paint complex 3D-printed objects, such as lightweight frames for aircraft and biomedical stents, that could save manufacturers time and money and provide new opportunities to create “smart skins” for printed parts
Senior level military members are constantly evaluating risk and finding ways to articulate and mitigate risks on the battlefield. When it comes to new technology adoption and consideration, these same leaders must take a similar approach to justify spending taxpayer dollars and implementing new processes to improve operational outcomes
When weight reduction is the primary goal, 3D-printed aluminum alloys are a frequent choice for aerospace and high-performance motorsports applications. Aluminum is much lighter than nickel alloys and has been particularly popular for laser powder-bed fusion (LPBF) because it’s good for prototyping and easy to post-process
Marotta Controls Montville, NJ 973-334-7800
The utilization of Additive Manufacturing (AM) technology in the current manufacturing sector is growing day - by - day. This is made possible by the constant development of new materials and techniques to overcome the difficulties that are encountered while fabricating a part. In AM, parts are fabricated by laying successive layers on one another till the complete part is build. This gives AM an edge over conventional manufacturing. Even intricate or hollow parts can be fabricated with the same ease as fabricating a solid part. The key objective of this project is to evaluate and compare mechanical properties of Polyethylene Terephthalate - Glycol modified (PETG) and Carbon fiber reinforced Polyethylene Terephthalate - Glycol modified (CF - PETG), which are fabricated using Fused Deposition Modelling (FDM) process of AM. The ASTM standards D638 and D790 were followed for fabricating tensile test and Flexural test specimens respectively. Subsequently, fractured specimens are analyzed
Fiber-reinforced polymer composites propose exceptional directional mechanical properties, and combining their advantages with the potential of 3D printing has resulted in many novel research fronts. Industries have started using 3D printed components which are rapidly replacing conventional material components in most of the industries. Carbon fiber reinforced Polylactic Acid (PLA) often finds its application in reasonably high loading conditions working at lesser speed like lightweight gears, spanners, nuts, and bolts. Wear reduction is an important factor that plays an important role in prolonging the component's life. Hence, it is crucial to optimize 3D printing parameters to get desired strength according to the application. The aim of this paper is to conduct the wear rate test on the Fused Deposition Modelled (FDM) printed carbon fiber reinforced PLA parts, to identify the optimum printing parameters which are crucial for wear reduction. Two process parameters i.e. fill density
Assessment of the boundaries for self-ignition of unburned charge in spark ignition engines (also related to knock) is required for development of the engine concepts and controls with respect to charge composition, spark advance and valve timing when designing the gas engines with wide range of the fuel compositions and converting compression ignition engines to gas engines. In this paper the combination of the single-zone model of the SI engine and chemical kinetics modeling is evaluated as a rapid prototyping tool for prediction of the self-ignition of the unburned charge in SI engine. The single-zone model simulates the cylinder pressure history based on Wiebe heat release function. The simulation of the self-ignition of the unburned charge is performed with coupled solution of the system of ordinary differential equations for temperature and species concentration with detailed chemical kinetic mechanism. Three fuels were considered: primary reference fuel, methane, hydrogen. The
Items per page:
50
1 – 50 of 522