Macromolecular Symposia最新文献_第7页

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

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

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Macromol. Symp. 414 絮凝。414年计算机协会。

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70071

引用次数: 0

Joule Heating-Induced Self-Deformation of 3D-Printed Electrically Conductive PLA for Smart Gripping Applications 用于智能夹持应用的3d打印导电PLA的焦耳热诱导自变形

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70031

Raul-Mihai Petrașcu, Sever-Gabriel Racz, Eugen Avrigean

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Modeling Pedestrian Flows for Designing a Transfer System with Moving Walkways 行人流建模与移动人行道交通系统设计

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70062

Remus-Andrei Dobrinoiu, Ionuț-Cosmin Chiva, Augustin Semenescu, Florin Valentin Ruscă, Constantin Gheorghe Opran

{"title":"Modeling Pedestrian Flows for Designing a Transfer System with Moving Walkways","authors":"Remus-Andrei Dobrinoiu, Ionuț-Cosmin Chiva, Augustin Semenescu, Florin Valentin Ruscă, Constantin Gheorghe Opran","doi":"10.1002/masy.70062","DOIUrl":"https://doi.org/10.1002/masy.70062","url":null,"abstract":"Urban areas surrounding significant transit centers, such as the corridor between Politehnica Metro Station and POLITEHNICA University, see substantial pedestrian congestion, particularly during peak periods. This study investigates the efficacy of a moving walkway system in mitigating pedestrian congestion in this densely populated route. The study employs mass service theory and computer simulations to examine various conveyor designs, including single and multichannel systems, evaluating their effects on service metrics such as average waiting time, flow rate, and system capacity. The data, gathered over three weeks, indicates peak traffic patterns, establishing a foundation for precise demand modelling. Research indicates that multichannel moving walkways are very efficient in alleviating congestion and ensuring steady pedestrian movement. These insights provide urban planners with pragmatic options to enhance pedestrian mobility and infrastructure efficacy in urban corridors, facilitating a transition toward sustainable and accessible urban transportation design.","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.70062","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309165","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

Geopolymers with High Ash Percentages: A Stability Study 高灰分地聚合物的稳定性研究

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70019

Alberto D'Amore, Michelina Catauro, Veronica Viola

引用次数: 0

Advanced Methodologies for Fatigue in Agricultural Machinery: Integrating Multibody Dynamics and Finite Element Analysis 农业机械疲劳的先进方法：整合多体动力学和有限元分析

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70068

Amelia Felaco, Nicolae Ionescu, Giuseppe Lamanna

{"title":"Advanced Methodologies for Fatigue in Agricultural Machinery: Integrating Multibody Dynamics and Finite Element Analysis","authors":"Amelia Felaco, Nicolae Ionescu, Giuseppe Lamanna","doi":"10.1002/masy.70068","DOIUrl":"https://doi.org/10.1002/masy.70068","url":null,"abstract":"In an era of rapid technological advancements and increasing demands for efficiency, safety, and durability in engineering systems, the study of fatigue resistance has become crucial. Accurately predicting fatigue life allows engineers to design more resilient structures, reduce maintenance costs, and prevent catastrophic failures with severe safety and economic consequences. This research investigates advanced methods for analyzing fatigue in mechanical systems, with a focus on agricultural machinery. By combining multibody dynamics (MBD) and finite element analysis (FEA), the study addresses the challenges of durability in components essential to the performance and operational lifespan of agricultural vehicles. The empirical analysis centers on the cleaning system of a combine harvester, using simulations to predict fatigue life and identify critical failure points. The integration of flexible body dynamics into the MBD model enabled a more accurate representation of the system's dynamic properties, with simulation results validated by experimental data. The study highlights the advantages of combining MBD and FEA for fatigue analysis, offering insights into broader applications in mechanical design and contributing to the development of safer, more durable agricultural machinery.","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.70068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308691","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

A Preliminary Study on Fatigue Behavior of Aluminum Single-Lap Joints Subjected to Laser Surface Treatments 激光表面处理铝单搭接接头疲劳行为的初步研究

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70060

Claudio Leone, Davide Morello, Ciro Coscione, Giuseppe Lamanna, Silvio Genna

{"title":"A Preliminary Study on Fatigue Behavior of Aluminum Single-Lap Joints Subjected to Laser Surface Treatments","authors":"Claudio Leone, Davide Morello, Ciro Coscione, Giuseppe Lamanna, Silvio Genna","doi":"10.1002/masy.70060","DOIUrl":"https://doi.org/10.1002/masy.70060","url":null,"abstract":"The study deals with the effects of laser surface treatments on the fatigue behavior of adhesive-bonded aluminum joints. Laser texturing, laser cleaning, and their combination are produced by adopting a 30 W nanosecond pulsed Yb:YAG laser. Parallel grooves, perpendicular to the load direction, varying in depth, width, and areal density are adopted as textured geometrical features. To assess the performance of laser treatments a central composite design (CCD) experimental plan is adopted to evaluate the apparent shear strength of single-lap joint test (ASTM D1002-10). Then, for the more promising treatment conditions, fatigue tests are carried out according to the ASTM D3166-99 standards, and cycles to failure are adopted to quantify the treatments. In addition, mechanical surface treatment (sandpaper polishing) is adopted as a reference treatment. Findings demonstrate that laser treatments significantly enhance the fatigue life of the joints (up to six times), offering a promising alternative to traditional mechanical methods.","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.70060","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308697","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

Deposition Simulation of Composite Flexural Specimen Obtained Via Fused Filament Fabrication 熔丝制备复合材料弯曲试样的沉积模拟

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70036

Theodor Florian Zach, Mircea Cristian Dudescu

{"title":"Deposition Simulation of Composite Flexural Specimen Obtained Via Fused Filament Fabrication","authors":"Theodor Florian Zach, Mircea Cristian Dudescu","doi":"10.1002/masy.70036","DOIUrl":"https://doi.org/10.1002/masy.70036","url":null,"abstract":"Over the past four decades, polymer additive manufacturing through Fused Filament Fabrication (FFF) has advanced significantly, gaining prominence in numerous engineering sectors owing to its efficiency and cost-effectiveness. Despite these advancements, one of the persistent challenges hindering the full potential of FFF is precision inconsistency due to the cyclical thermal gradient, limiting the potential of manufacturing dimension-sensitive parts. Acknowledging this concern, this study introduces numerical simulations to predict flexural specimen dimensions before manufacturing. The primary objective is to correlate the numerical model with experimental data. This research fills a notable gap in the literature on additive manufacturing materials by focusing on high-temperature resilient composites, such as nylon-short carbon fibers. The simulation methodology incorporates all relevant manufacturing parameters, following the deposition path to minimize discrepancies between the expected and actual dimensions. The results show a strong correlation between the simulation outputs and experimental data, including thermal images and dimensional measurements. In conclusion, this validated numerical approach allows for dimensional corrections in the design of simple to complex parts made of high-temperature-resilient composites manufactured via FFF.","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":"144309026","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

Finite Element Simulations of Compression After Impact Tests in CFRP Panels CFRP板冲击后压缩的有限元模拟

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70040

A. Polverino, A. Aversano, L. Pianese

{"title":"Finite Element Simulations of Compression After Impact Tests in CFRP Panels","authors":"A. Polverino, A. Aversano, L. Pianese","doi":"10.1002/masy.70040","DOIUrl":"https://doi.org/10.1002/masy.70040","url":null,"abstract":"This study presents the development and validation of a finite element (FE) model to simulate the compression after impact (CAI) test of composite structures using Abaqus. The model integrates a detailed representation of the support system and employs a quasi-static analysis to simulate the compression phase. Simulations are aimed to predict the compressive failure load for a carbon fiber-reinforced polymer (CFRP) panel previously impacted at different energy levels. The simulations offer precise insights into postimpact structural performance. A key focus of the research was optimizing the model to achieve efficient computational costs without compromising accuracy. The FEM approach provides a cost-effective and time-saving alternative to physical testing. Results demonstrated the model's capability to accurately predict CAI behavior, highlighting its potential to streamline the design and testing processes for advanced composite materials. This work emphasizes the significance of FEM-based simulations in developing reliable and resource-efficient methodologies for assessing the structural integrity of high-performance components.","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.70040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308985","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