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Redesign of Structural Elements of Passenger Seat Based on Circular Economy Principles 基于循环经济原则的汽车座椅结构元件再设计
Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70063
Michele Perrella, Amedeo Di Marco, Matteo Bruno, Enrico Armentani
{"title":"Redesign of Structural Elements of Passenger Seat Based on Circular Economy Principles","authors":"Michele Perrella,&nbsp;Amedeo Di Marco,&nbsp;Matteo Bruno,&nbsp;Enrico Armentani","doi":"10.1002/masy.70063","DOIUrl":"https://doi.org/10.1002/masy.70063","url":null,"abstract":"<p>A product's environmental impact spans its entire lifecycle, from creation to disposal. The circular economy aims to eliminate this impact and resource waste by closing resource flow loops. In this perspective, circular design strategies are essential in achieving this goal. The end-of-life products should allow for easy material separation to enable reintegration into production cycles. In this work, design strategies that favor circularity, such as design for disassembly and design for recovery, were considered. The modular redesign of a passenger vehicle seat armrest was conducted with the purpose to achieve modularity, lightness, comfort improvement, easy maintenance, and reconfigurability of the armrest assembly. Finite element virtual tests were performed by using Ansys Workbench, in order to simulate, respectively, a loading condition according to NF F31-119 standard and an act of vandalism to separate the coupled parts of the new armrest. The results obtained in terms of strength and stiffness of the redesigned train seat armrest were considered satisfactory.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/masy.70063","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Laser Surface Texturing of Biodegradable Polymers 生物可降解聚合物的激光表面变形
Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70053
Petronela-Daniela Rusu (Ostahie), Simona-Nicoleta Mazurchevici, Catalin Tampu, Constantin Carausu, Ciprian Dumitru Ciofu, Dumitru Nedelcu
{"title":"Laser Surface Texturing of Biodegradable Polymers","authors":"Petronela-Daniela Rusu (Ostahie),&nbsp;Simona-Nicoleta Mazurchevici,&nbsp;Catalin Tampu,&nbsp;Constantin Carausu,&nbsp;Ciprian Dumitru Ciofu,&nbsp;Dumitru Nedelcu","doi":"10.1002/masy.70053","DOIUrl":"https://doi.org/10.1002/masy.70053","url":null,"abstract":"<p>Surface modification through forming, micro grooving, micro dimples, and microchannel is known as surface texturing. In addition to other related techniques on the substrate surface, laser and micromachining are used to accomplish this. The surface properties of the Arbofill Fichte biodegradable polymer with four and six passes, hexagonal and square patterns, and laser texturing are presented in this study. The results were focused on surface microscopy and topography of the four textured samples. Based on the acquired results, it is also possible to replace non-biodegradable polymers from other areas of activity.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimization of Real-Time Monitoring and Control of Industrial Conveyor Systems Using Vision Automated Identification Methods 基于视觉自动识别方法的工业输送系统实时监控优化
Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70037
Nicolae Tunsoiu, Andrei Staicu, Daniela Tunsoiu, Mihaela-Elena Ulmeanu, Cristian-Vasile Doicin
{"title":"Optimization of Real-Time Monitoring and Control of Industrial Conveyor Systems Using Vision Automated Identification Methods","authors":"Nicolae Tunsoiu,&nbsp;Andrei Staicu,&nbsp;Daniela Tunsoiu,&nbsp;Mihaela-Elena Ulmeanu,&nbsp;Cristian-Vasile Doicin","doi":"10.1002/masy.70037","DOIUrl":"https://doi.org/10.1002/masy.70037","url":null,"abstract":"<p>The integration of new technologies such as the internet of things and artificial intelligence in industrial automation represents the next stages of development in industrial engineering. This paper focuses on studying two automated control methods for recognizing a part on an industrial conveyor belt, enabling remote monitoring of the entire belt's operation. The main objective of this study is to monitor and regulate the functioning of a conveyor in a virtual environment by analyzing parameters resulting from the comparison of the two methods. Identifying the primary object on the conveyor and analyzing data in real time are key aspects of the entire process of simulating automation. Developing applications for identifying parts on the industrial conveyor can enhance the speed of real-time information analysis. Upon identifying a missing object or a nonconformity, an alert system notifies the responsible personnel who can take immediate action.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Predicting the Residual Life of Spur Gears Using the SED Method 用SED方法预测直齿齿轮的剩余寿命
Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70056
Donato Perfetto, Nima Rezazadeh, Mario Munno, Stefano Beneduce
{"title":"Predicting the Residual Life of Spur Gears Using the SED Method","authors":"Donato Perfetto,&nbsp;Nima Rezazadeh,&nbsp;Mario Munno,&nbsp;Stefano Beneduce","doi":"10.1002/masy.70056","DOIUrl":"https://doi.org/10.1002/masy.70056","url":null,"abstract":"<p>Ensuring sustainability in the industrial sector is a global priority, encompassing environmental, economic, and social dimensions. Achieving this objective requires the development of efficient strategies for product value retention, including numerical finite element (FE) models to predict component life and optimize resource utilization. For spur gears, as an example, accurate FE models are essential to replicate experimental behavior and estimate the number of cycles to failure (<i>N<sub>f</sub></i>) under operational loads. This study applies the local average strain energy density (SED) method to predict the residual life, that is, <i>N<sub>f</sub></i>, of a spur gear under varying operational loads ranging from 68 kN to 95 kN. A systematic approach was adopted: (i) developing geometric and FE model (using 2-D plane strain elements) of the gear to replicate an existing experimental setup, (ii) determining a suitable control radius <i>R</i><sub>0</sub> to define the control volume for SED calculation, and (iii) validating the FE model against experimental data. The use of <i>R</i><sub>0</sub> was instrumental in accurately capturing the energy density distribution, enabling precise residual life predictions. Results showed good agreement between SED values and experimental data, confirming that higher load levels led to increased SED values, which in turn resulted in lower <i>N<sub>f</sub></i>.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/masy.70056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recyclable Composite Materials for the Upholstered Furniture Industry 用于软垫家具行业的可回收复合材料
Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70039
Cornel Ciupan, Emilia Ciupan, Mihai Ciupan
{"title":"Recyclable Composite Materials for the Upholstered Furniture Industry","authors":"Cornel Ciupan,&nbsp;Emilia Ciupan,&nbsp;Mihai Ciupan","doi":"10.1002/masy.70039","DOIUrl":"https://doi.org/10.1002/masy.70039","url":null,"abstract":"<p>The furniture industry is one of the world's most important sectors, but due to the scarcity of wood and its high-cost companies have to look for alternatives. Natural fiber composites represent one alternative because many fibrous plants are easy to cultivate and generate high yields. The purpose of this work is to present formulations of materials that use short fibers such as poplar and willow. The paper presents five formulations of composite materials using willow, poplar, and hemp fibers, mixed with thermoplastic fibers, in different percentages. The consolidation in the form of a fibrous layer is done by Carding Airlaid Fusion Technology (CAFT). From the S5 material (20% willow, 20% poplar, 20% hemp, 5% bicomponent, and 35% polypropylene) twelve boards (marked S5.1–S5.12) are thermoformed by setting-up different parameters. This material was characterized, and the results are presented in the paper.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
3D Printed Materials with Electrical Properties Tailored for Thermal Management 为热管理量身定制的具有电性能的3D打印材料
Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70030
Marialuigia Raimondo, Francesca Aliberti, Elisa Calabrese, Roberto Pantani, Teresa Rosaria Verde, Andrea Sorrentino, Liberata Guadagno
{"title":"3D Printed Materials with Electrical Properties Tailored for Thermal Management","authors":"Marialuigia Raimondo,&nbsp;Francesca Aliberti,&nbsp;Elisa Calabrese,&nbsp;Roberto Pantani,&nbsp;Teresa Rosaria Verde,&nbsp;Andrea Sorrentino,&nbsp;Liberata Guadagno","doi":"10.1002/masy.70030","DOIUrl":"https://doi.org/10.1002/masy.70030","url":null,"abstract":"<p>FDM (fused deposition modeling) 3D-printed parts, based on acrylonitrile butadiene styrene (ABS) with multi-walled carbon nanotubes (MWCNTs), are manufactured to obtain different multi-scale configurations of the internal conductive pathways. By appropriately selecting materials and printing parameters, it is possible to align MWCNTs along the printing direction, leading to an increase of electrical conductivity from 6.88  × 10<sup>−2</sup> S/m before printing to 1.19 × 10<sup>1</sup> S/m of a single printed filament. Consequently, the conductive network arrangement through the sample justifies the higher electrical conductivity parallel to the printing direction (1.22 S/m) than its value perpendicularly measured (7.34 × 10<sup>−2</sup> S/m) in 3D-printed samples. This approach, together with a suitable choice of the electrical contact position, allows controlling the flow of the electrical current, conferring parts the ability to heat up when subjected to an electrical source selectively. This energy-saving strategy can be advantageously applied to print quickly, in a single step, electronic devices, thermistors capable of converting electrical energy into thermal energy, heat exchangers, and electromagnetic interference (EMI) and radio frequency interference (RFI) shielding.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/masy.70030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrical Behavior of Nanocomposites Exposed to Water Sorption 纳米复合材料在水吸附下的电学行为
Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70027
Luigi Vertuccio, Francesca Aliberti, Raffaele Longo, Liberata Guadagno
{"title":"Electrical Behavior of Nanocomposites Exposed to Water Sorption","authors":"Luigi Vertuccio,&nbsp;Francesca Aliberti,&nbsp;Raffaele Longo,&nbsp;Liberata Guadagno","doi":"10.1002/masy.70027","DOIUrl":"https://doi.org/10.1002/masy.70027","url":null,"abstract":"<p>The present study examines the electrical response of nanocomposites to water uptake. Specifically, an electrical signal was employed to detect the amount of water absorbed in a carbon nanotube-based epoxy composite. The investigation focused on changes in the electrical resistance of the composite with a filler content (0.1% by weight) near the electrical percolation threshold. Water penetration results in “non-Fickian” diffusion behavior due to the composite's viscoelastic nature and plasticization effects. The variation in time of the resistance change ratio, similar to that of water absorption, allows associating the electrical resistance measurement for the amount of the absorbed water by the use of a sensitivity factor.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bending Behavior of an Anisotropic Composite Polymeric Material Part 各向异性复合聚合物材料零件的弯曲行为
Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70046
Alina Bregnova, Elisaveta Crăciun, Adelina Hrițuc, Liviu Andrușcă, Alexei Toca, Oana Dodun, Laurentiu Slătineanu
{"title":"Bending Behavior of an Anisotropic Composite Polymeric Material Part","authors":"Alina Bregnova,&nbsp;Elisaveta Crăciun,&nbsp;Adelina Hrițuc,&nbsp;Liviu Andrușcă,&nbsp;Alexei Toca,&nbsp;Oana Dodun,&nbsp;Laurentiu Slătineanu","doi":"10.1002/masy.70046","DOIUrl":"https://doi.org/10.1002/masy.70046","url":null,"abstract":"<p>Attempts to identify a solution for a part made of polymeric material that would present increased resistance to bending led to the proposal of a composite-type structure with a matrix of polymeric material and metallic reinforcing elements. Experimental research is designed and materialized to obtain information regarding the behavior of a part of anisotropic composite polymeric material under bending stress. The study confirms the existence of different bending strength values for various positions of the part to the direction of the force applied to the part to generate bending stresses.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lean Six Sigma Implementation in the ROAF 精益六西格玛在ROAF中的实施
Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70044
Vasile Adrian Stoiculete, Florian Răpan, Răzvan Hrițcu
{"title":"Lean Six Sigma Implementation in the ROAF","authors":"Vasile Adrian Stoiculete,&nbsp;Florian Răpan,&nbsp;Răzvan Hrițcu","doi":"10.1002/masy.70044","DOIUrl":"https://doi.org/10.1002/masy.70044","url":null,"abstract":"<p>The recorded achievements of the Lean Six Sigma in the private sector demonstrably influenced the United States Air Force (USAF) to adopt these specific management processes in 2009. The most important goals of this management system are to improve efficiency, to reduce waste, and to enhance overall performances of the considered organization at all of its levels. The paper aims to review its utilization by USAF, correlated with its applicability in the private sector, in different domains. By reviewing these topics, the paper assesses its suitability for optimizing and redesigning procedures within the Romanian Air Force (ROAF) in order to obtain similar efficiency gains and resource allocation optimization. For the analysis of ROAF are considered some of the main topics which require improvements such as human resources management, from education to employment and personnel retention, leadership, and technology used for training, missions, and maintenance. Also, the paper highlights the possible limitations and obstacles for the implementation of Lean Six Sigma in ROAF, especially human reluctance for change.</p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Macromol. Symp. 414 絮凝。414年计算机协会。
Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70071
{"title":"Macromol. Symp. 414","authors":"","doi":"10.1002/masy.70071","DOIUrl":"https://doi.org/10.1002/masy.70071","url":null,"abstract":"<p><b>Cover</b>:</p><p>This issue of Macromolecular Symposia contains selected papers presented at the 8th International Conference Polcom 2024. The cover is provided by Giuseppe Lamanna. \u0000 \u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/masy.70071","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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