Experimental Investigation of the Effectiveness of Various Stitching Methods on Arresting Mode-II Interlaminar Damage Propagation in Stitched Resin-Infused Composites
This work is focused on investigating the impact of various out-of-plane stitching methods on enhancing mode-II interlaminar fracture toughness (or energy).
Resin Infusion Best Practices: SAMPE 2025
Presentation from the Mississippi Advanced Composites Training Center on resin infusion best practices, including lessons from the FAA stitched and unstitched resin infusion wing box project.
Inclusion of Manufacturability Considerations on Design Optimization of a Composite Rotor Blade
The optimization of rotor blade aerodynamic and structural design is pivotal for enhancing overall rotorcraft performance in terms of, e.g., reduced power requirements and energy consumption, and increased range and cargo capacity.
Wavefield Analysis Enabled Multi-Directional Mechanical Properties Characterization for 3D Printed Composites
Thermoset composites, utilized in additive manufacturing, are distinguished by their excellent thermal and mechanical properties, enabling them to maintain structural integrity even under high-temperature conditions.
Resin Infusion Best Practices: JAMS/SAMPE Update, May 2024
Presentation from the Mississippi Advanced Composites Training Center on resin infusion best practices, including lessons from the FAA stitched and unstitched resin infusion wing box project.
State of the Industry – Resin Infusion: A Literature Review
Resin infusion processes, both resin transfer molding (RTM) and its variations, such as vacuum assisted resin transfer molding (VARTM), are poised to be more heavily adopted in transport aerospace applications due to several major advantages. This report investigated industrial applications of resin infusion and provides a general overview of many of the different types of resin infusion, the current state of these processes, automation of these processes, and novel applied technologies. Also included is a list of flying examples of resin infused aerospace parts from major original equipment manufacturers (OEMs).
Experimental investigation of the structural performance of composite structures produced using additive manufacturing
This project is focused on investigating the structural performance of parts and structures produced using the latest additive manufacturing techniques.
Experimental multi-scale characterization of mode-II interlaminar fracture in geometrically scaled stitched and unstitched resin-infused composites
This work is focused on investigating the impact of out-of-plane stitches on enhancing mode-II interlaminar fracture toughness (or energy) and characterizing damage progression and crack arrestment in stitched resin-infused composites.
Using Additive Manufacturing to Characterize Effects of Sparse Infill Density and Sparse Infill Pattern on the Compressive Properties of Short Strand Carbon Fiber Infused PETG
The advent of additive manufacturing has revolutionized the prototyping, design, and manufacturing of new and innovative products.
Prioritization Methodology for Resin Infusion Research
This work is the first academic application describing the prioritization methodology for resin infusion research using the New Product Blueprinting (NPB) process developed by the AIM Institute. It is intended to be read in conjunction with DOT/FAA/TC-23/2, Resin Infusion – State of the Industry to fully understand the benefits, shortcomings, and necessity of research of resin infused aerospace parts. This process identifies, qualifies, and quantifies problem statements found in the aerospace industry that are preventing adoption of resin infusion. Approximately thirty interviews were conducted up and down the value stream to identify the top ten problem statements for resin infusion. Interviewees included original equipment manufacturers (OEMs), raw material suppliers, tier 1 suppliers, new and experienced users, and providers of machine solutions. Subsequently, approximately thirty additional interviews were conducted to quantify the satisfaction and importance of each of these problem statements.
Epoxy Resin with Carbon Nanotube Additives for Lightning Strike Damage Mitigation of Carbon Fiber Composite Laminates
Carbon fiber composites are paving the way for light weight, high strength structures in the aerospace industry. While the benefits of carbon fiber composites are undeniable, they also have their drawbacks.
Modeling and Linear Analysis of Stitched Carbon Fiber Epoxy Composite Laminates for Mode I Delamination
Composites are used in assemblies more often now, requiring different joints such as mechanical fasteners, riveting, welding, and polymeric adhesives. These methods tend to trade off on the strength of the joint for increased assembly weight and cause additional constraints to be considered in the design process, complicating the design process further.
Numerical Estimations of Lightning-Induced Mechanical Damage in Carbon/Epoxy Composites Using Shock Wave Overpressure and Equivalent Air Blast Overpressure
A new approach is proposed for predicting lightning-induced mechanical damage using the shock wave overpressure (SWO) due to lightning arc channel expansion and also its equivalent air blast overpressure (ABO) due to an explosion of chemical potential energy in AS4/3506 carbon/epoxy laminates.
Acenaphthylene‐derived perfluorocyclobutyl aromatic ether polymers
Three new bis (trifluorovinyl ether) monomers enchained with polycyclic aromatic hydrocarbon (PAH) cores were synthesized.
Comparison of Lightning Protection Performance of Carbon/Epoxy Laminates with a Non-Metallic Outer Layer
This study shows how a lightning protection layer can be designed to effectively mitigate lightning damage in underlying composite structures.
Artificial Lightning Strike Tests on PRSEUS Panels
The lightning damage resistance of Pultruded Rod Stitched Efficient Unitized Structure (PRSEUS) panels was characterized experimentally. Two unprotected PRSEUS panels were subjected to standard impulse current waveforms (consistent with actual lightning strikes) with 50, 125, and 200 kA nominal peak currents at a variety of panel locations.
Investigating the Composite/Metal Interface and its Influence on the Electrical Resistance Measurement
The advantages introduced by carbon fiber reinforced polymer (CFRP) composites has made them an appropriate choice in many applications and an ideal replacement for conventional materials.
Molecular Dynamics Simulations of The Aggregation Behavior of Overlapped Graphene Sheets in Linear Aliphatic Hydrocarbons
Molecular dynamics simulations were used to investigate the aggregation of two partially overlapped graphene sheets in hexane, dodecane and eicosane.
Development of an Experimental Setup to Study Carbon/Epoxy Composite Subjected to Simulated Lightning Current
A series of artificial lightning strike tests were performed on AS4/8552 carbon/epoxy laminated composites, at various peak currents.
Temperature‐Dependent Thermal Decomposition of Carbon/Epoxy Laminates Subjected to Simulated Lightning Currents
The present study aimed to characterize matrix thermal decomposition induced by simulated lightning strikes on a typical 32-ply carbon/epoxy laminate.
Thermal Response of Carbon Fiber Epoxy Laminates with Metallic and Nonmetallic Protection Layers to Simulated Lightning Currents
Nonlinear finite element (FE) simulations to characterize lightning-induced thermal damage in AS4/3506 carbon/epoxy composites with metallic and nonmetallic protection layers were performed and then compared with those for unprotected composites.
Molecular Dynamics Simulations of the Graphene Sheet Aggregation in Dodecane
Molecular dynamics simulations are used to investigate the aggregation and behavior of two parallel graphene sheets (22.0–64.0 Å in length) in dodecane.
Effect of Graphene Dispersion on the Equilibrium Structure and Deformation of Graphene/Eicosane Composites as Surrogates for Graphene/Polyethylene Composites: A Molecular Dynamics Simulation
Molecular dynamics simulations are used to investigate the effect of graphene dispersion on the equilibrium structure and deformation of graphene/eicosane composites.
Development of an Experimental Setup to Analyze Carbon/Epoxy Composite Subjected to Current Impulses
In this paper, variation in electrical properties of CFRP caused by relatively low magnitude current impulses discharged through CFRP coupons are reported, and internal changes of the composite, due to current impulses, are studied.
Behavior of Protruding Lateral Plane Graphene Sheets in Liquid Dodecane: Molecular Dynamics Simulations
Molecular dynamics simulations are used to investigate the behavior of two parallel graphene sheets fixed on one edge (lateral plane) in liquid dodecane. The interactions of these sheets and dodecane molecules are studied with different starting inter-sheet distances.
Thermal Response to Simulated Lightning Currents on Stitched Composite Aircraft Structures
Integrally stitched composite structures have attracted significant interest for enhancing the structural integrity of aircraft.