Characterisation of the shape memory effect of PET polymer by FFF 3D printing
Ermolai, Vasile; Sover, Alexandru; Lang, Anette (2023)
Materials Research Proceedings 28, 93-100.
DOI: 10.21741/9781644902479-11
Open Access Peer Reviewed
In recent years the interest in finding new shape memory polymers has increased. Withal, fewer studies approached the use of regular materials such as polyethene terephthalate (PET), a widely available material. The research investigated the shape memory characteristics of regular PET 3D printed samples in two testing cycles. The recovery temperature was determined through dynamical mechanical, followed by tensile testing and heat treatment of the specimens. The results show PET has good shape memory properties, recording a slight increase in shape recovery during the second testing cycle without affecting the sample integrity. The thermal analysis of the recovered material shows that heat treatment time or/and temperature need to be improved to stabilise the PET material structure.
Methoden zur Entlackung von Kunststoffteilen
Sover, Alexandru (2023)
Fachforum 2023 "Kunststoffe vernetzen" der VWI HG Ansbach, 15.04.2023.
Open Access
Simulation of Dielectric Properties of Nanocomposites with Non-Uniform Filler Distribution
Ciobanu, Romeo C.; Damian , Radu F.; Schreiner , Cristina M.; Aradoaei, Mihaela; Sover, Alexandru; Raichur, Ashok M. (2023)
Ciobanu, Romeo C.; Damian , Radu F.; Schreiner , Cristina M.; Aradoaei, Mihaela...
Polymers 2023, 15 (7), 1636.
DOI: 10.3390/polym15071636
Open Access Peer Reviewed
Dielectric properties for nanocomposites with metallic fillers inside a polymer matrix were determined using CST STUDIO SUITE—Electromagnetic field simulation software followed by the free-space Nicolson–Ross–Weir procedure. The structure is randomly generated to simulate the intrinsic non-uniformity of real nanomaterials. Cubic insertions were equated to corresponding spherical particles in order to provide either the same volume index or the same exterior surface index. The energy concentration around the inserts and within the entire material was determined as useful information in practice in order to design materials tailored to avoid exceeding the field/temperature limit values. The paper successfully associated the dialectic measurements with the results from the computer simulations, which are mainly based on energetic effects in electromagnetic applications. The experimental results are comparable with the software simulation in terms of precision. The conclusions outline the practical applications of the method for both electromagnetic shielding and microwave domain/telecommunications applications.
Coupling of Simulation Tools for Obtaining Local Fatigue in Combination with Experimental Data
Adamchuk, Nazar; Rösch, Bernhard; Schlüter, Wolfgang; Reissner, Felix-Christian; Baumgartner, Jörg (2023)
Adamchuk, Nazar; Rösch, Bernhard; Schlüter, Wolfgang; Reissner, Felix-Christian...
Simulation Notes Europe 33, 1-8.
DOI: 10.11128/sne.33.tn.10631
Open Access Peer Reviewed
Cast iron components have a good strength to weight ratio. This leads to their frequent use in the wind industry. The design of cast iron components is currently based on the use of individual simulation tools and material data that is common to all components. In order to better exploit the lightweight potential of cast iron components, it is necessary to link the simulation software tools and thus take into account local material properties already in the design phase. This is described in this paper using the example of a large casting for the wind industry
Micro- and nanoplastic contamination detection in plant samples by correlative microscopy
Wissler, J.; Häfner, Philipp; Aberle, A.; Lörler, Nadine; Mamdouh, D.; Szwajgier, D.; Reimann, Hans-Achim (2023)
Wissler, J.; Häfner, Philipp; Aberle, A.; Lörler, Nadine; Mamdouh, D.; Szwajgier, D....
Proceedings Microscopy Conference 2023, Darmstadt, LS5.P005.
DOI: 10.5283/epub.54367
Open Access Peer Reviewed
Einsatz von KI-Methoden zur Optimierung der Service-Prozesse zwischen mittelständischem Maschinenbau und Endkunden (KI4Service)
Göhringer, Jürgen; Fleischmann, Josef (2023)
Abschlussbericht Forschungsprojekt Bayerisches Staatsministerium für Wirtschaft, Landesentwicklung und Energie / VDI.
Correlative microscopy approach for micro- and nanoplastics detection in plant matrix
Wissler, J.; Häfner, Philipp; Szwajgier, D.; Reimann, Hans-Achim (2023)
Biophysical Journal 122 (3), 543a-544a.
DOI: 10.1016/j.bpj.2022.11.2878
Peer Reviewed
The world-wide plastics pollution into nature enters the human food chain as degradation products, influencing environmental habitat and health. Micro- and nanoplastics as foreign bodies contaminating beverages and foods on the cellular level are likely to have a long-term impact on nutrition growth, public and personal health. Nanoparticles and their spatial location are generally difficult to detect in biological specimens, especially plastic particles due to their analogous hydrocarbon-based matrix. Reliable analysis methods for the discovery of micro- and nanoplastic particles in entities are not fully established yet. We are therefore developing a correlative workflow for detecting plastics residuals in cellular tissue. We determined that light microscopy (LM) is usable for a coarse estimation of the contamination grade of plant samples. Due to its optical diffraction limit, LM rather detects nanoparticle patches than single particles, shown with fluorescent particles. Scanning electron microscopy (SEM) instead provides higher resolution, especially for single particle detection. EM sample staining is still required to depict polymerous nanoparticle specimens. Using LM and SEM data in a CLEM approach with TESCAN CORAL, discovery of contaminated plant areas is possible with single nanoparticle resolution. It reveals that nanoparticles seem to be tightly attached to the plant material. It indicates further that basic food cleaning procedures might be insufficient for particle removal. The workflow circumvents correlative sample 3D-topography issues. But insights into the plant matrix is best possible with z-information. Therefore, we additionally use focused ion beam (FIB) to determine inclusions of micro- and nanoplastics in the tissue/cellular matrix, investigating the optimal procedural approach as model for biomaterial systems. Procedural correlative microscopy provides a promising analysis method for the semiquantitative analysis of micro- and nanoparticles plant contaminations.
Investigating Thermal Stability Behaviour of Proteins
Tekiner, Ismail Hakkia; Knoblauch, Anke; Sover, Alexandru; Häfner, Philipp; Muschler, N. (2023)
Tekiner, Ismail Hakkia; Knoblauch, Anke; Sover, Alexandru; Häfner, Philipp...
V. INTERNATIONAL HALICH CONGRESS ON MULTIDISCIPLINARY SCIENTIFIC RESEARCH, January 15-16, Istanbul, Türkiye.
Open Access Peer Reviewed
Robust Dynamical Component Analysis and its Application on Epileptic EEG and Motion Sense Data
Warmuth, Monika; Romberger, Philipp; Uhl, Christian; Hüper, Knut (2022)
Proceedings of the Workshop Biosignal 2022, Dresden, Deutschland.
A Matrix Formulation of Dynamical Component Analysis (DyCA)
Romberger, Philipp; Warmuth, Monika; Uhl, Christian; Hüper, Knut (2022)
Proceedings of the Workshop Biosignal 2022, Dresden.
Wasserstoff-Inselnetzwerk der Hochschule Ansbach
Schultheiß, Daniel; Jarosch, Dieter; Kapischke, Jörg (2022)
Green Efficient Technologies, Dr. Harnisch Verlags GmbH, Nürnberg, 14 - 17.
Open Access
Hydrogen-island grid of Ansbach University of Applied Sciences
Schultheiß, Daniel; Jarosch, Dieter; Kapischke, Jörg (2022)
Green efficient technologies, Dr. Harnisch Verlags GmbH, Nürnberg, 14 - 17.
Open Access
Quantifying the impact of external and internal factors and their interactions on thermal load behaviour of a building
Matschi, Christoph; Nemeth, Isabell (2022)
Acta Polytechnica CTU Proceeding 38, 25-30.
DOI: 10.14311/APP.2022.38.0025
Open Access Peer Reviewed
Use of the 3-Level Idea Diagram Method to Identify Constructive Solutions for the Development of a Thermoforming Mould
Boca, Marius-Andrei; Sover, Alexandru; Slătineanu, Laurenţiu (2022)
Bulletin of the Polytechnic Institute of Iași. Machine constructions Section 68 (4), 9-22.
DOI: 10.2478/bipcm-2022-0031
Open Access Peer Reviewed
Improved Approach to Designing the Vacuum Channels for Additively Manufactured Thermoforming Moulds
Boca, Marius-Andrei; Sover, Alexandru (2022)
Acta Technica Napocensis - Series: Applied Mathematics, Mechanics, and Engineering 65 (4S).
Open Access Peer Reviewed
Shape Recovery Properties of Pet-based 3D Printed Samples
Ermolai, Vasile; Sover, Alexandru; Nagit, Gheorghe; Irimia, Alexandru Ionut (2022)
Acta Technica Napocensis - Series: Applied Mathematics, Mechanics, and Engineering 65 (4S).
Open Access Peer Reviewed
Tensile behavior of joints of strip ends made of polymeric materials
Mihalache, Andrei Marius; Ermolai, Vasile; Sover, Alexandru; Nagit, Gheorghe; Boca, Marius-Andrei; Slătineanu, Laurenţiu; Hriţuc, Adelina; Dodun, Oana; Ripanu, Marius-Ionut (2022)
Mihalache, Andrei Marius; Ermolai, Vasile; Sover, Alexandru; Nagit, Gheorghe...
Polymers (14), 4990.
DOI: 10.3390/polym14224990
Open Access Peer Reviewed
Geometrical deviations of green parts due to additive manufacturing: a synthetic geometrical performance index
Vendittoli, Valentina; Polini, Wilma; Walter, Michael S. J. (2022)
Procedia CIRP 114, 159-164.
DOI: 10.1016/j.procir.2022.10.036
Open Access Peer Reviewed
This work presents a synthetic geometrical performance index that combines all dimensional and geometrical deviations of a printed part to
express its quality. Smaller is the value of this index, greater is the part quality. The paper demonstrates the effectiveness of this index by printing
a set of parts through Fused Filament Fabrication in a biological polymer. These parts, characterized by representive hollows, were measured by
optical scanning technology. The proposed methodology shows the advantages of this index, thus future work can focus on further printing
techniques and varying process parameter values.
The Use Of Laser Technology For Recycling Hybrid Electronic Waste
Sover, Alexandru; Zink, Markus; Ciobanu, Romeo C. (2022)
International Conference and Exposition on Electrical And Power Engineering (EPE), Iasi, Romania, 360-363.
DOI: 10.1109/EPE56121.2022.9959803
Peer Reviewed
The Use Of Laser Technology For Recycling Hybrid Electronic Waste
Sover, Alexandru; Zink, Markus; Ciobanu, Romeo C. (2022)
International Conference and Exposition on Electrical And Power Engineering (EPE), Iasi, Romania, 2022.
Peer Reviewed
Bereich Forschung und Transfer (BFT)
Hochschule Ansbach
Betreuung der Publikationsseiten
Bereich Forschung & Transfer (BFT)forschung[at]hs-ansbach.de