Persival GmbH’s Post

New publications in the research area of reactive multilayer systems --- The production technology group at Technische Universität Ilmenau proudly announces the #joint publication of four new #articles in the current issue of the scientific journal of advanced engineering materials. In collaboration with our colleagues from the related research centres at Technische Universität Ilmenau, Technische Universität Berlin, Universität des Saarlandes and Helmut-Schmidt-Universität/Universität der Bundeswehr Hamburg, these publications address new insights into the research area of #reactive #multilayer systems. Addressed topics include the joining of #hybrid material pairings, experimental characterisation, thermal #FEM #simulation, applied mechanical stress on reactive multilayers and external #crack #initiation as well as the influence of density changes within the #microstructure. These studies contribute further knowledge into the fundamental characteristics of a new, innovative joining #technology and will help to utilise it for future applications. Interested readers are referred to our article "Influence of Metal Surface Structures on Composite Formation during Polymer–Metal Joining Based on Reactive Al/Ni Multilayer Foil“ - https://lnkd.in/e_R7h9fN. We would like to thank our colleagues and co-authors as well as the Deutsche Forschungsgemeinschaft (DFG) - German Research Foundation #DFG for supporting the associated research project. #innovation #engineering #productiontechnology

🔗 [New Publication Alert] 📢 I’m thrilled to share our latest research publication titled “Investigation of effects induced by 57 MeV 56Fe ions and 9 MeV protons on additively manufactured PEKK for space application” 🌟🔬 developed in collaboration with CSIRO and ANSTO. 📖 This study investigated the effects of heavy ions from Galactic Cosmic Rays and Solar Particle Events on chemical, surface, and micromechanical properties of PEKK. To achieve this, SPENVIS simulations were performed to quantify the fluences of protons and heavy ions experienced by satellites on orbit and the calculated fluences of ions were then implanted on PEKK to emulate space-like conditions for the first time in literature. 🌐 🔍 Abstract Highlights: •SPENVIS simulations determined fluence of ions experienced by satellites in space. •A particle accelerator was used to implant Fe ions and H+ on 3D printed PEKK. •Chemical and micromechanical properties remained unaffected due to irradiation. •Additively manufactured PEKK shows potential for structural applications in space. Journal: Polymer Testing (DOI: 10.1016/j.polymertesting.2024.108354) 📚 Read the full open access article here: https://lnkd.in/gW7VWPY2 Many thanks to the co-authors Abdullah Kafi, Ranya Simons, Stefania Peracchi, Zeljko Pastuovic, Christopher Easton and Stuart Bateman for their invaluable contribution. 🙌 If you find our work insightful, feel free to share it with your network! Let’s advance the field of polymer science together. 🚀 #polymerresearch #materialsengineering #spacescience #scientificdiscoveries 👏 Thank you for your support! Let’s keep pushing the boundaries of knowledge. 🌟🔬✨.

🚀 After much hard work, our research on Shape Memory Alloy Hybrid Composites has finally been published in Composite Part B Journal. This represents the best achievement in terms of adhesion obtained until now in the integration of SMA in composites and my greatest accomplishment in terms of publication thanks to Tommaso Brugo, Paolo Cosseddu, Giulia Scalet and Andrea Zucchelli. Our latest research at the University of Bologna, in collaboration with the University of Pavia, explores a novel elastomeric interface to enhance adhesion in Shape Memory Alloy Hybrid Composites. This innovative approach addresses the challenges of large strains during martensitic transformations, significantly improving performance and stress-strain transfer. 🔬 Key Highlights: - Enhanced Interface Adhesion with a simple, economical and effective method Using a rubber-like elastomeric interface🌟. - Experimental & Numerical Validation: Comparative pull-out tests and finite element analysis with Cohesive Zone Modeling. - Promising Applications: Potential for advanced composite morphing structures with smart materials for aerodynamics. 📄 Read more about our findings and the potential impact on future applications! https://lnkd.in/dFp-S5tW 🌟 A special thanks to Gummiwerk KRAIBURG GmbH & Co. KG  for generously donating the KRAIBON® used in the experiments. #Research #Innovation #SmartMaterials #Composites #Engineering

Today we continue our #teamBT series and introduce you to our colleague Luis Baier. 🚀   Luis has been working as a research assistant and doctoral student at our institute since mid-2020, more precisely in the Department of Ceramic Composites and Structures. He previously studied aerospace engineering at the Universität Stuttgart. After his studies, he took the opportunity at #DLR to deepen his knowledge at the research level and complete his academic career with a doctorate.   His field of research is Ultra High Temperature Ceramic Matrix Composites. These are technical ceramics that are suitable for use at temperatures well above 2000°C, for example in #space travel for re-entry bodies, combustion chambers and thermal protection systems, and are superior to metallic materials. As this is a relatively new class of materials, his research focuses on the complete development of the material, from the sketch sheet to the finished component, so to speak. This includes the consideration and selection of promising material combinations, the development and adaptation of the manufacturing process with our high-temperature furnaces and the final analysis of the samples using scanning electron microscopy, computer tomography, plasma wind tunnel tests and mechanical #testing methods.   He is also responsible for the design and construction of fibre-reinforced ceramic nozzles for sounding rockets, accompanying the entire process chain from the initial design through to the test bench.   Find here more information about our Department of Ceramic Composites and Structures: https://lnkd.in/ehQyK8g9   Deutsches Zentrum für Luft-und Raumfahrt e.V.   #dlrbt #dlr #cmc #ceramics #dlrceramics #ceramiccomposites #research #innovation #aerospace #rocket #thermalprotectionsystem #tps #science #materials #UHTCMC #spacetravel #reentry #combustionchamber #hightemperature #keramik #keramischeverbundstrukturen #raumfahrt #forschung #brennkammer #wiedereintritt

Witness the fascinating smoke flow visualization over a free-to-roll delta wing model mounted in a subsonic wind tunnel at the Aerodynamics lab (Mechanical Cluster), UPES under the guidance of Dr. Dhiraj. The experimental setup was designed and developed by third-year Aerospace Engineering students as a part of their project, which was financially supported through the SHODH grant provided by the university for undergraduate research. The primary objective of this student project is to investigate the wing rock phenomenon of delta wings and develop a mechanism to mitigate it, thereby enhancing wing stability. At a critical wind speed, the delta wing model exhibits a flow-induced limit cycle roll oscillation, commonly referred to as the wing rock phenomenon. This phenomenon typically occurs in very slender delta wings (with high sweep angles) at high angles of attack (α ≥ 25°). The counter-rotating wing tip vortices, prominently featured in the video, are pivotal in inducing instability in the wing, and by manipulating these vortices, the oscillations of the wing can be controlled. UPES Ram Sharma, PhD Ranjeet Brajpuriya Piyush Kuchhal Dr. Nilanjana @Dr. Ashish Karn Banerjee Dr. Bikarama Prasad Yadav Stuti Gandhi Manav Aggarwal Kanu Talwar Amit Narayan Ankur Jain Sarthak Garg Harish Pundeer Sumit Wason Rahul Pillai

We’re excited to announce a fantastic PhD completion by Dr. Jordan Noronha on 𝐓𝐢𝐭𝐚𝐧𝐢𝐮𝐦 𝐇𝐨𝐥𝐥𝐨𝐰-𝐬𝐭𝐫𝐮𝐭 𝐋𝐚𝐭𝐭𝐢𝐜𝐞 𝐌𝐞𝐭𝐚𝐦𝐚𝐭𝐞𝐫𝐢𝐚𝐥𝐬 𝐛𝐲 𝐋𝐚𝐬𝐞𝐫 𝐏𝐨𝐰𝐝𝐞𝐫 𝐁𝐞𝐝 𝐅𝐮𝐬𝐢𝐨𝐧. 👏 🌺 Jordan’s research, exploring innovation in metallic metamaterials by additive manufacturing (#AM), is driven by the constant search for stronger, lighter materials. Metal strut-based lattices are a type of cellular material that offers an alternative solution to the development of breakthrough metallic materials, yet these metamaterials largely conform to empirically derived limits. To overcome these limits and ensure mechanical properties that satisfy the engineering industry, this research project has kickstarted the laser powder bed fusion (#LPBF) manufacture of higher relative density (10-40%) Ti-6Al-4V lattices with hollow node and strut sections. After overcoming difficulties with powder removal and porosity defects in initial hollow strut manufacture assessments, #LPBF-fabricated hollow-strut lattices (HSL) were designed that challenged conventional lattice metamaterials. Although structurally efficient these Ti-6Al-4V HSLs reported significant weakening at their nodes that caused premature localised lattice failure. Consequentially, Jordan developed design strategies to negate this and improve HSL structural efficiency. A notable design strategy included multi-topology lattice metamaterials, a new classification of metal lattice that combined HSL and thin-plate lattices in a single topology to evenly distribute stress. These multi-topology metamaterials far surpassed the empirically derived limits for cellular materials and achieved an absolute yield strength that exceeded bulk magnesium alloys. This novel metamaterial was recently published in Advanced Materials (https://lnkd.in/gCVB3E-A) and was subsequently reported in 192 news articles that reached 𝟐𝟓𝟎 𝐦𝐢𝐥𝐥𝐢𝐨𝐧 𝐫𝐞𝐚𝐝𝐞𝐫𝐬. With nine first-author journal publications, the outcomes from this thesis should promote the idea that lattices can eventually provide an alternative solution to high-strength lightweight metal alloys. We acknowledge the RMIT University supervisory team: Prof. Ma Qian, Prof. Martin Leary, Dr. Elizabeth Kyriakou, and Prof. Milan Brandt. A massive thank you to the Australian Research Council (#ARC) which funded his research through a Discovery Project. We extend our best wishes to Jordan for his future ventures and career. #additivemanufacturing #3dprinting #RCAM #rmituniversity #ARC #phd #project #research #phdstudent

Invitation to read the Article: FREE COMPRESSION TUBE FOR ROCKETS – published by American Institute of Physics AIP FULL PAPER, Research Gate, Berlin: https://lnkd.in/dsMTkHZ2 Patent: https://lnkd.in/dS2Xpta By energy balance studies for vehicles in flight, the author Ioan Rusu directed his research in reducing the energy lost at vehicle impact with air masses. In this respect as compared to classical solutions for building flight vehicles aerodynamic surfaces which reduce the impact and friction with air masses, Ioan Rusu has invented a device which he named free compression tube for rockets, registered with the State Office for Inventions and Trademarks of Romania, OSIM, deposit f 2011 0352. Mounted in front of flight vehicles it eliminates significantly the impact and friction of air masses with the vehicle solid. THE FREE COMPRESSION TUBE ELIMINATES THE FRICTION BETWEEN THE AIR AND THE ROCKET... ELIMINATES THE HEATING OF THE ROCKET... ELIMINATES THE THERMAL TRACE OF THE ROCKET... IT IS STEALTH ... I recommand to read the science paper “FREE COMPRESSION TUBE. APLICATIONS” published by American Institute of Physics: https://lnkd.in/eXR-82n Conference: 9th International Conference on Mathematical Problems in Engineering, Aerospace and Sciences, which has held at the Vienna University of Technology, Austria, during July 10 - July 14, 2012

Invitation to read the Article: FREE COMPRESSION TUBE FOR ROCKETS – published by American Institute of Physics AIP FULL PAPER, Research Gate, Berlin: https://lnkd.in/dsMTkHZ2 Patent: https://lnkd.in/dS2Xpta By energy balance studies for vehicles in flight, the author Ioan Rusu directed his research in reducing the energy lost at vehicle impact with air masses. In this respect as compared to classical solutions for building flight vehicles aerodynamic surfaces which reduce the impact and friction with air masses, Ioan Rusu has invented a device which he named free compression tube for rockets, registered with the State Office for Inventions and Trademarks of Romania, OSIM, deposit f 2011 0352. Mounted in front of flight vehicles it eliminates significantly the impact and friction of air masses with the vehicle solid. THE FREE COMPRESSION TUBE ELIMINATES THE FRICTION BETWEEN THE AIR AND THE ROCKET... ELIMINATES THE HEATING OF THE ROCKET... ELIMINATES THE THERMAL TRACE OF THE ROCKET... IT IS STEALTH ... I recommand to read the science paper “FREE COMPRESSION TUBE. APLICATIONS” published by American Institute of Physics: https://lnkd.in/eXR-82n Conference: 9th International Conference on Mathematical Problems in Engineering, Aerospace and Sciences, which has held at the Vienna University of Technology, Austria, during July 10 - July 14, 2012

Invitation to read the Article: FREE COMPRESSION TUBE FOR ROCKETS – published by American Institute of Physics AIP FULL PAPER, Research Gate, Berlin: https://lnkd.in/dsMTkHZ2 Patent: https://lnkd.in/dS2Xpta By energy balance studies for vehicles in flight, the author Ioan Rusu directed his research in reducing the energy lost at vehicle impact with air masses. In this respect as compared to classical solutions for building flight vehicles aerodynamic surfaces which reduce the impact and friction with air masses, Ioan Rusu has invented a device which he named free compression tube for rockets, registered with the State Office for Inventions and Trademarks of Romania, OSIM, deposit f 2011 0352. Mounted in front of flight vehicles it eliminates significantly the impact and friction of air masses with the vehicle solid. THE FREE COMPRESSION TUBE ELIMINATES THE FRICTION BETWEEN THE AIR AND THE ROCKET... ELIMINATES THE HEATING OF THE ROCKET... ELIMINATES THE THERMAL TRACE OF THE ROCKET... IT IS STEALTH ... I recommand to read the science paper “FREE COMPRESSION TUBE. APLICATIONS” published by American Institute of Physics: https://lnkd.in/eXR-82n Conference: 9th International Conference on Mathematical Problems in Engineering, Aerospace and Sciences, which has held at the Vienna University of Technology, Austria, during July 10 - July 14, 2012

Our #review article in #SmallJournal is selected as 🔥🔥Hot Topic: Surfaces and Interfaces🔥🔥. VUB Research Universiteit Twente | Faculteit TNW MESA+ #colloids #vub #assembly #materialscience #surfaces #interfaces #AdvancedMaterials #dryassembly #sustainibility #particles #chemistry #physics #solventfree #softmatter.#assembly #small #AdvancedMaterialsInterfaces Here is a link to this #openaccess review #article: