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Composite materials are used to design driveshafts when significant weight savings are sought or when traditional materials cannot be used. ...Driveshaft design consists of selecting the number of intermediate supports, the shaft diameter and wall-thickness. With composites, the choice of fibers and fiber orientation are additional variables to be used for optimization. ...This paper review the basic theory necessary for designing composite driveshafts and optimum design procedures are discussed.

Manufacturing readiness of composite rotors and certification of flywheels depend in part on the maturity of nondestructive evaluation (NDE) technology for process optimization and quality assurance, respectively. ...Examples of possible occurring flaws or anomalies in composite rings as detected by NDE and validated by destructive metallography are shown. The general NDE approach to ensure quality of composite rotors and to help in the certification of flywheels is briefly outlined. ...The general NDE approach to ensure quality of composite rotors and to help in the certification of flywheels is briefly outlined.

The most recent development has been the utilization of computer graphics and a 5-axis gantry robot router to accelerate the design, moldmaking and parts trimming tasks. The composite structure fabrication processes at the RFRL have evolved from wet-lay-up to autoclave cure. ...Currently, the feasibility of the stitched composite material preform and resin transfer molding process is being explored. The organizational structure of the RFRL rapid prototyping group has been found to be most important in accomplishing a vehicle development that is technically sound, safe, and reasonable in cost. ...The RFRL faculty adopted a plan to invest in advanced computing, automation, and composite processing equipment to enhance the rapid prototyping expertise that has been developed over the years.

Growing use of composite materials in aircraft wing construction requires a new generation of drilling machines. ...Electroimpact developed the LTD machine to address the specific needs posed by large scale composite wing box assembly. The machine maximizes the efficacy of blind access to create a single sided assembly process. ...Through thoughtful engineering and thoroughly developed processes the LTD presents a highly capable and cost efficient solution for composite wing box drilling automation.

Continuous-fiber composite materials are currently being evaluated as replacement materials for conventional steel alloys for primary load-carrying members of automotive structures. ...The objective of this study was to design and fabricate a composite space frame based on a targa-top body configuration. The present paper summarizes the overall structural design, fabrication, and vibrational response of the space frame. ...The frequency response of the composite structure was also determined computationally and experimentally and compared to the response of an optimized mild steel space frame.

Due to the low analysis time requirements, the software package is an efficient tool for use in design and optimization cycle of bolted joints involving composite materials. This work is conducted as part of a larger effort currently underway at the AdTech Systems Research, Inc. to establish a baseline to extend the joint design methodology for generalized composite systems including life prediction, thermal effects and dissimilar materials. ...This work is conducted as part of a larger effort currently underway at the AdTech Systems Research, Inc. to establish a baseline to extend the joint design methodology for generalized composite systems including life prediction, thermal effects and dissimilar materials.

An economic analysis is presented of a composite (= staged) configuration option to a supersonic transport with transatlantic range. It is shown that the staged approach offers economic advantages over a conventional SST.

Thermal de-icing WIPS integrated in composite structures intrinsically have unsteady behaviors; the tool enables the computation of the skin temperature evolution with the time. ...This is advantageous for assessing the impact of thermal ageing of metallic structures or for validating the used materials of composite structures. Therefore the weight can be optimized.

Composites are finding more and more applications in the aircraft industry. Drilling good quality holes is a major challenge for the manufacturing industry.

. • Methodologies for evaluating the structural performance of carbon/epoxy composite panels. • An aerodynamic design of flexible wings made of composite structures. • Thermal design and analysis of composite enclosures. • Methodologies for analyzing the acoustic performance of composite structures, including the design optimization method to evaluate the acoustic performance in terms of transmission loss (TL) of various composite panels. • The lightening effect on composites, presenting a theoretical method to compute the electrical current propagating through composite structures due to lightning strikes. • The issue of fire resistance as most polymer resins are flammable once the respective ignition temperatures are reached. • A probabilistic-based reliability analysis of the composite structures. .... • Thermal design and analysis of composite enclosures. • Methodologies for analyzing the acoustic performance of composite structures, including the design optimization method to evaluate the acoustic performance in terms of transmission loss (TL) of various composite panels. • The lightening effect on composites, presenting a theoretical method to compute the electrical current propagating through composite structures due to lightning strikes. • The issue of fire resistance as most polymer resins are flammable once the respective ignition temperatures are reached. • A probabilistic-based reliability analysis of the composite structures. .... • Methodologies for analyzing the acoustic performance of composite structures, including the design optimization method to evaluate the acoustic performance in terms of transmission loss (TL) of various composite panels. • The lightening effect on composites, presenting a theoretical method to compute the electrical current propagating through composite structures due to lightning strikes. • The issue of fire resistance as most polymer resins are flammable once the respective ignition temperatures are reached. • A probabilistic-based reliability analysis of the composite structures.

The collaborative development of digital twins will inform additive manufacturing (also known as 3D printing), advanced composites, assembly, and industry 4.0 processes at GKN Aerospace's Global Technology Centre in order to enable the high rate production of aircraft structures.

A design procedure is presented which utilizes (1) the active control technologies such as Flutter Mode Control, Gust Load Alleviation and Maneuver Load Control to relax the strength and stiffness requirements on wing structure, and (2) structural optimization to derive the minimum weight composite wing structures satisfying the relaxed structural requirements. The design procedure is applied to the preliminary design study of a Supersonic Commercial Transport configuration with laminated composite wing structure. ...The design procedure is applied to the preliminary design study of a Supersonic Commercial Transport configuration with laminated composite wing structure. Four design configurations are compared. Maximum of about 30% structural weight reduction was achieved from the quasi-isotropic design.

When dealing with advanced composite materials, such parameters include: material, surface topology, layup strategy, ply stacking, among many possibilities. ...Designers today are faced with the challenge of optimizing composite parts and, should redesign be required, having enough reliable data at hand to justify the redesign's necessity. ...A multidisciplinary manufacturing analysis tool for designers, TruPLAN's Advanced Material Kinematics Kernel models how a given composite material behaves during the computation of manufacturing process strategies for automated layup technologies, like: fiber placement, tape laying, and robotics.

In this paper, the above-mentioned probabilistic approach is applied for the analysis of a stiffened composite panel of an aircraft and its acoustic performances in terms of transmission loss. The frequency dependent transmission loss of this composite structure is optimized with respect to two ply thicknesses and four material properties in order to obtain a high transmission loss throughout different frequencies for good acoustic insulation. ...The frequency dependent transmission loss of this composite structure is optimized with respect to two ply thicknesses and four material properties in order to obtain a high transmission loss throughout different frequencies for good acoustic insulation. ...The structural behavior of the composite panel is calculated with the Finite Element Method, while the acoustic performance is predicted with the Boundary Element method.

Central composite design (CCD) is used for experimentation. In order to create reliable models describing the process behavior, response surface methodology (RSM) is used.

Abstract Aluminum Metal Matrix Composite (AMMC) materials have loftier individualities and are known as an alternative material for a range of aerospace and automotive engineering applications.

Designing Electronic Warfare to Regain Airborne Military Dominance Certifying Composite Designs for Aerospace and Defense Electric Rockets and the Future of Satellite Propulsion Flat Cable Technology for Aerospace Applications XPONENTIAL 2017 – An AUVSI Experience Pulse Analysis Techniques for Radar and Electronic Warfare Reconfigurable Radio Tracks Flights Worldwide Development of an Optically Modulated Scatterer Probe for a Near-Field Measurement System Using Dempster-Shafer Fusion for Personnel Intrusion Detection Angular Random Walk Estimation of a Time-Domain Switching Micromachined Gyroscope Using Fisher Information Criteria for Chemical Sensor Selection via Convex Optimization Methods Luminescence Materials as Nanoparticle Thermal Sensors

We have replaced a part of the original wings' upper and lower surfaces with a flexible, composite material skin whose shape can be modified, according to the variable airflow conditions, using internally placed actuators.

We developed an aero-structural optimization scheme for rotor design, including an aerodynamic model with included ground effect prediction, finite-element analysis and integrated composite failure analysis, and a detailed weight estimation scheme. This was solely build on computer CAD models.

This is especially true of composite manufacturing processes in combination with new materials that are now under development.