ThermoPlastic composites Research Center (TPRC)’s Post

I'm happy to share that our research article has been published!📃 “𝑷𝒓𝒆𝒅𝒊𝒄𝒕𝒊𝒐𝒏 𝒐𝒇 𝒕𝒉𝒆 𝒊𝒏-𝒑𝒍𝒂𝒏𝒆 𝒑𝒆𝒓𝒎𝒆𝒂𝒃𝒊𝒍𝒊𝒕𝒚 𝒂𝒏𝒅 𝒂𝒊𝒓 𝒆𝒗𝒂𝒄𝒖𝒂𝒕𝒊𝒐𝒏 𝒕𝒊𝒎𝒆 𝒐𝒇 𝒇𝒊𝒃𝒆𝒓-𝒑𝒍𝒂𝒄𝒆𝒅 𝒕𝒉𝒆𝒓𝒎𝒐𝒑𝒍𝒂𝒔𝒕𝒊𝒄 𝒄𝒐𝒎𝒑𝒐𝒔𝒊𝒕𝒆 𝒑𝒓𝒆𝒇𝒐𝒓𝒎𝒔 𝒘𝒊𝒕𝒉 𝒆𝒏𝒈𝒊𝒏𝒆𝒆𝒓𝒆𝒅 𝒊𝒏𝒕𝒆𝒓𝒕𝒂𝒑𝒆 𝒄𝒉𝒂𝒏𝒏𝒆𝒍𝒔” 👉 https://lnkd.in/edvUHdAS Abstract: The two main void removal mechanisms during vacuum-bag-only (VBO) consolidation of thermoplastic composites are through-thickness diffusion and in-plane air evacuation. The automated fiber placement (AFP) process allows for the creation of preforms with an engineered intertape channel network by deliberately introducing spacing between the tapes that can facilitate air evacuation during the VBO consolidation. However, it is unclear what dimensions of the intertape channels allow for effective in-plane air evacuation. The current research presents a predictive simulation tool to optimize the intertape channel dimensions for effective in-plane air evacuation. An analytical method is developed to calculate the in-plane permeability tensors of the composite preform with uniform intertape channel dimensions. In addition, a more elaborate mesoscale method is developed that estimates the in-plane permeability tensor of the engineered intertape channel network based on the distributions in intertape channel dimensions. Finally, a finite difference model is implemented to calculate the time required for air evacuation as a function of the in-plane permeability tensors of the preform and its in-plane dimensions. The results from the models indicated that in-plane air evacuation through the engineered intertape channel network is quick, and it takes only a few minutes to evacuate 99% of the air from large preforms like fuselage panels. This research was published in cooperation with Jagadeesh Narayana Swamy, Wouter Grouve, Sebastiaan Wijskamp and Remko Akkerman.

☀ New Blog Post Alert! When it comes to optical engineering, accurately measuring surface reflectance and transmittance is critical in industries like aerospace, defense, and materials science. Our latest blog post breaks down the key differences in scattering measurements between BSDF, BRDF, BTDF and methodologies for performing these measurements If you're looking to deepen your understanding or are in need of reliable measurement solutions, check out our guide on the different approaches. https://lnkd.in/gkhsEqaT #OpticalMeasurements #BRDF #BSDF #BTDF #Engineering #SurfaceOptics #MaterialScience

🚀 New testmethod available ❗ Sliprings are a common building block of satellites and are used to transfer electrical signals and electric power onto a rotating axis. A lot of R&D in this field was ongoing in the last years and it was found, that actual tribometers are reaching their limits when it comes to testing of sliprings. Not only the harsh environment of thermal vacuum, but also very low forces and currents ensure challenging measurements. Self-heating effects, electrical micro-interruptions, preload loss of brushes and many more effects were discovered and analysed at Aerospace & Advanced Composites GmbH. With the new slipring tribometer an extended temperature range 🌡 ❄ can now be covered for further analysis. #sliprings #spaceindustry #spacetechnology

A thermally conductive urethane, Appli-Thane® 7308 maintains its dispensability for over 8 hours – making it ideal for automated applications. The self-leveling material is reworkable at room temperature – and was initially developed to eliminate a separate cure cycle when assembling circuit boards. It can be cured during mass-reflow without disturbing the placement of components, thus eliminating several costly component-level processing steps. Appli-Thane 7308 has excellent dielectric properties and low modulus – meaning, it won’t stress sensitive components, and it meets NASA’s low-outgassing requirements. Learn more about this material (TDS): https://lnkd.in/gPbArFzA

A thermally conductive urethane, Appli-Thane® 7308 maintains its dispensability for over 8 hours – making it ideal for automated applications. The self-leveling material is reworkable at room temperature – and was initially developed to eliminate a separate cure cycle when assembling circuit boards. It can be cured during mass-reflow without disturbing the placement of components, thus eliminating several costly component-level processing steps. Appli-Thane 7308 has excellent dielectric properties and low modulus – meaning, it won’t stress sensitive components, and it meets NASA’s low-outgassing requirements. Learn more about this material (TDS): https://lnkd.in/gPbArFzA

✈️I am excited to share my final project for the Numerical FluidDynamics course. In particular, using Harlow-Welch discretization, the flow behavior within a contraction channel is been analyzed, The examined flow is considered an incompressible viscous flow, so the ’no-slip’ condition is applied to each wall. Inflow and outflow are both considerd as parabolic flow (Poiseuille). Several studies have been carried out by varying the contraction ratio and the Reynolds number. 💨This revealed that at low Reynolds the flow symmetry is maintained, while at higher Reynolds it is lost as time progresses, and also vortices are formed at the entrance and within the contraction. It is also noted that as the Reynolds and the contraction ratio increase, the flow within the contraction is increasingly subject to separation and vortices. So this work shows the relationship between these variables in determining flow behavoir. #aerospace #engineering #HarlowWelch #FluidDynamics #NumericalFluydDynamics #NumericalSimulation

Time is running out to register for our new webinar, “Specialized Advanced Materials Enabling the Development of New Aerospace Technologies,” presented by Mike Gedeon and hosted by ASM International. As the aerospace industry evolves with new technologies and the rise of private space exploration, the demand for cutting-edge materials to support these innovations has never been greater. Learn how advanced solutions like lightweight metal matrix composites, high-temperature refractory metals, and copper-based alloys are enabling these breakthroughs. Don’t miss this opportunity to gain insights into the materials driving the future of aerospace innovation. https://bit.ly/3BgR2K6 #AerospaceEngineering #AdvancedMaterials #SpaceTechnology #EnablingWhatsNext

🔔 🛩 We are delighted to invite you to contribute your papers to this new Special Issue of Aerospace MDPI. 📔📔 Special Issue Title: Flow and Heat Transfer in Solid Rocket Motors More info:🔗 https://lnkd.in/gtJzqJ29 #solid_rocket_motor #complex_flow_and_heat_transfer #ablation_mechanism #insulator #multiphase_flow_modeling #metal_droplet_behavior #design_of_combustion_chamber_and_nozzle #combustion_modeling #prediction_of_performance

Laser Thermal, a Charlottesville-based company, has been awarded a Phase I Small Business Technology Transfer (STTR) contract by the US Department of Defense (DoD) Office of the Secretary of Defense – Basic Research Office (OSD-BRO). The contract will enable the development of advanced thermal metrology technology for high-thermal-conductivity materials and interfaces. The Phase I program will last six months, with an additional six-month option until February 2025. Laser Thermal aims to improve the characterization of high-thermal-conductivity materials, thermal interface resistances, sub-surface films, heat-sinks, temperature-dependent properties, and spatially varying thermal resistances in high-power devices. https://buff.ly/3x3ydrH #STTR #PhaseI #Metrology

⚡Large eddy simulation of a pitching airfoil undergoing deep dynamic stall⚡ Representation of the flow field developed around a pitching airfoil under a deep dynamic stall. This video shows how a large-scale Leading Edge Vortex is formed during pitch-up motion and shed due to a Trailing Edge Vortex formed before the maximum pitch angle is reached. 📝 Case simulated with the LES-solver Hydro3D and published in Journal of Fluids Engineering: https://lnkd.in/e3ys4QuK #cfd #simulation #engineering #aerodynamics