发布求助
文献互助 智能选刊 最新文献

Eksploatacja i Niezawodność – Maintenance and Reliability最新文献

筛选
英文 中文
Sandwich panel subjected to blast wave impact and accelerated fragments 夹芯板受到爆炸波冲击和加速碎片的影响
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-02-11 DOI: 10.17531/ein/183698
R. Studziński, Wojciech Sumelka, M. Malendowski, T. Gajewski, H. Al-Rifaie, P. Sielicki
{"title":"Sandwich panel subjected to blast wave impact and accelerated fragments","authors":"R. Studziński, Wojciech Sumelka, M. Malendowski, T. Gajewski, H. Al-Rifaie, P. Sielicki","doi":"10.17531/ein/183698","DOIUrl":"https://doi.org/10.17531/ein/183698","url":null,"abstract":"The article presents sandwich panels subjected to blast wave impact and accelerated fragments. The research discusses results obtained from original experimental setups that fill a gap in the area of investigation of the mechanical response of sandwich panels used in civil engineering applications under accidental design situations such as blast wave impact and/or fragment penetration. In field experiments, a high-speed camera was used to record both the fragment trajectory and the deflection of the sandwich panel. The authors proposed the equivalent static load for both the global analysis of the sandwich panel and the calibration of the numerical model. In FE modelling, CONWEP algorithm was used to simulate blast wave impact, and ductile damage model material to allow perforation of the sandwich panel faces. The convergence of mesh size was analyzed. For the validated numerical model, an evaluation of the effect of the size of the fragment (diameter/mass) on the outlet velocity and the size of the inlet and outlet holes was carried out.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"46 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139844996","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
The assessment of the technical condition of a tire belt using computed tomography. 使用计算机断层扫描评估轮胎带的技术状况。
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-01-30 DOI: 10.17531/ein/183177
Jan Warczek, Krzysztof Żak
{"title":"The assessment of the technical condition of a tire belt using computed tomography.","authors":"Jan Warczek, Krzysztof Żak","doi":"10.17531/ein/183177","DOIUrl":"https://doi.org/10.17531/ein/183177","url":null,"abstract":"Car tire belting is a key structural element. Its operation in the tire determines the maintenance of the geometrical stability of the pneumatic wheel in conditions of variable operational loads. The belt creates a spatial composite structure in which the structural component is usually made of braided steel strands. The even arrangement of the fibers in the belt determines its mechanical properties. Under normal conditions, the belting is invisible in used tires and its technical condition is difficult to assess. The arrangement of the belt wires in the tire can be seen using X-ray imaging, which was used in this work. In the conducted research, various configurations of the lamp settings and the detector of the measurement system were tested. On the basis of the tests performed, it is possible to assess irregularities in the belting resulting from manufacturing errors. However, a more important application of the obtained results is the possibility of assessing operating wear. Delamination in the belt detected during the tests reduce the safety of using such tires.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"138 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140484997","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
Subzero temperatures and low-frequency impact on MFC piezoelectric transducers for wireless sensor applications 零下温度和低频对用于无线传感器应用的 MFC 压电传感器的影响
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-01-30 DOI: 10.17531/ein/183316
Marek Łukasz Płaczek, Grzegorz Kokot, Tolera G. Degefa
{"title":"Subzero temperatures and low-frequency impact on MFC piezoelectric transducers for wireless sensor applications","authors":"Marek Łukasz Płaczek, Grzegorz Kokot, Tolera G. Degefa","doi":"10.17531/ein/183316","DOIUrl":"https://doi.org/10.17531/ein/183316","url":null,"abstract":"This research paper is a continuation of a prior study [12] that focused on the positive temperature range. The current work investigates the behavior of a laminated Macro Fiber Composite (MFC) piezoelectric transducer when exposed to negative temperatures. The study aims to understand the sensitivity of the transducer under varying ambient temperatures and frequencies, particularly for applications in wireless sensor networks. The integrated Macro Fiber Composite piezoelectric transducer is both theoretically modeled and empirically verified. Experimental tests involve subjecting the laminated MFC piezoelectric transducer to sinusoidal forces generated by an electro-pulse waveform generator, while a thermal chamber is used for temperature control. Controlled displacement is applied to the transducer at low-frequency (5 to 25 Hz) ranges and different moderate temperatures (0 to -40 degrees Celsius). The results highlight the significant influence of temperature and excitation frequency on the generated voltage by the MFC transducer.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"25 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140482520","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
Lubrication Reliability and Oil Churning Loss of Differential Gear Trains in a Mechanical-Hydraulic Coupling Mechanism 机械液压耦合机构中差速齿轮系的润滑可靠性和搅油损失
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-01-27 DOI: 10.17531/ein/182434
L. Wan, Hao Niu, Zhi-yuan Sun, Jinying Jiang, Wei Qin, Han-zheng Dai
{"title":"Lubrication Reliability and Oil Churning Loss of Differential Gear Trains in a Mechanical-Hydraulic Coupling Mechanism","authors":"L. Wan, Hao Niu, Zhi-yuan Sun, Jinying Jiang, Wei Qin, Han-zheng Dai","doi":"10.17531/ein/182434","DOIUrl":"https://doi.org/10.17531/ein/182434","url":null,"abstract":"A differential gear train (DGT) is a crucial component of a mechanical-hydraulic coupling mechanism. The transmission process generates oil churning losses, which significantly impact the overall transmission efficiency. Due to the complexity of DGTs and the unpredictability of lubrication reliability, traditional analysis of churning characteristics is inadequate. In this study, the moving particle semi-implicit (MPS) method is employed to analyze the effects of steady-state rotation speeds, dynamic rotation speeds, and oil filling heights on the oil churning characteristics of DGTs. The accuracy of the MPS method in predicting churning loss is illustrated by the average absolute percentage error of 6.4% obtained experimentally. It is concluded that: increasing the oil filling height improves lubrication reliability by 20.9%, but results in greater power loss. The lubrication reliability and power loss of DGTs with different output forms are mutually advantageous under different influencing factors. This paper helps to improve the lubrication reliability of DGTs.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"53 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140492146","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
Reduction of dynamic loads in the drive system of mining scraper conveyors through the use of an innovative highly flexible metal coupling 通过使用创新型高弹性金属联轴器，减少采矿刮板输送机驱动系统的动态负载
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-01-17 DOI: 10.17531/ein/181171
A. N. Wieczorek, Łukasz Konieczny, Grzegorz Wojnar, Rafał Wyroba, K. Filipowicz, M. Kuczaj
{"title":"Reduction of dynamic loads in the drive system of mining scraper conveyors through the use of an innovative highly flexible metal coupling","authors":"A. N. Wieczorek, Łukasz Konieczny, Grzegorz Wojnar, Rafał Wyroba, K. Filipowicz, M. Kuczaj","doi":"10.17531/ein/181171","DOIUrl":"https://doi.org/10.17531/ein/181171","url":null,"abstract":"The article provides a discussion on the results of the original studies of a power transmission system of a mining scraper conveyor coupled with an innovative highly flexible clutch, conducted in operating conditions. The research consisted in establishing the static characteristics of the highly flexible clutch in question, determining the torsional vibrations of the said highly flexible clutch and the vibrations of the transmission housings at a test rig, verifying if the coupling between the innovative flexible clutch and a typical scraper conveyor drive unit was correct, and testing durability of individual components of the highly flexible clutch. Following the aforementioned tests, one can distinguish three phases of its operation: initial, main, and final – all differing in terms of flexibility. Furthermore, upon increasing the flexibility of the metal clutch, a significant decline in the root mean square (RMS) values of linear vibration accelerations was observed compared to the blocked condition of the clutch.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"139 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140504945","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: 1
A novel approach to improve reliability of aerosol jet printing process 提高气溶胶喷射印刷工艺可靠性的新方法
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-01-17 DOI: 10.17531/ein/180012
Marcin Winnicki, Wojciech Łapa, B. Świadkowski
{"title":"A novel approach to improve reliability of aerosol jet printing process","authors":"Marcin Winnicki, Wojciech Łapa, B. Świadkowski","doi":"10.17531/ein/180012","DOIUrl":"https://doi.org/10.17531/ein/180012","url":null,"abstract":"Additive manufacturing is gaining interest for printing of noble metals. In this study, aerosol jet printing was applied to fabricate traces from commercial silver nanoparticle ink. A self-built three dimensional printing machine was used without or with in-line substrate heating. Subsequently, sintering was conducted by furnace or near-infrared source. Examination of the sample using scanning electron and atomic force microscopy revealed the existence of both micro- and nanoscale pores in the structure. Local open porosity, aerosol extensive spatter and wide porous overspray were key defects found in samples printed without substrate heating. All the features affect the properties and reliability of silver prints. In-line process heating increased the concentration of nanoparticles and limited defects formation. The final structure was influenced by sintering method and its time. Elongated time of sintering decreased porosity and roughness of the printed traces. Nevertheless, IR sintering provided the smoothest sample surface, and significantly improved bonding of aggregates.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":" 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139617086","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
Dynamic reliability calculation of random structures by conditional probability method 用条件概率法计算随机结构的动态可靠性
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-01-17 DOI: 10.17531/ein/181133
Jan Kubica, Bilal Ahmed, Akbar Muhammad, Muhammad Usama Aslam
{"title":"Dynamic reliability calculation of random structures by conditional probability method","authors":"Jan Kubica, Bilal Ahmed, Akbar Muhammad, Muhammad Usama Aslam","doi":"10.17531/ein/181133","DOIUrl":"https://doi.org/10.17531/ein/181133","url":null,"abstract":"For the composite random reliability problem, based on the Markov hypothesis of the dynamic\u0000response spanning action, two procedures of conditional probability explanation are accomplished: to\u0000derive the 2nd-order approximate expression for the calculation of the dynamic reliability of the\u0000random structure based on Taylor expansion method; secondly is to determine a mathematical\u0000sampling technique based on the Kriging model derive from the statistical analysis. Between them, the\u0000sampling procedure by the Kriging interpolation model meets the nonlinear correlation among dynamic\u0000reliability and structural random boundaries. Consequently, the finite element results can be used\u0000instantly to anatomize the significance of random structural parameters on dynamic reliability, avoiding\u0000the tedious and cumbersome theoretical derivation. The numerical example outcomes demonstrate\u0000that the numerical sampling method established upon the Kriging model is inconsiderate to the ratio to\u0000represent the dispersion and has additional benefits in computational verisimilitude and calculation\u0000productivity","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":" September","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139617843","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
Evaluation of the Reliability of the Shoulder and Knee Joint of the KPSIT C50 Dummy Adapted to Crash tests carried out at low speeds. 评估 KPSIT C50 假人肩关节和膝关节的可靠性，以适应低速进行的碰撞测试。
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-01-08 DOI: 10.17531/ein/178376
M. Jaśkiewicz
{"title":"Evaluation of the Reliability of the Shoulder and Knee Joint of the KPSIT C50 Dummy Adapted to Crash tests carried out at low speeds.","authors":"M. Jaśkiewicz","doi":"10.17531/ein/178376","DOIUrl":"https://doi.org/10.17531/ein/178376","url":null,"abstract":"The article presents the results of experimental studies on the reliability and monitoring of the condition of the knee and shoulder joints of an anthropometric dummy designed for low-speed crash tests. Next, the characteristics of the resistance moments in the joints of the KPSIT C50 dummy are compared with the characteristics of the drag torque of the HYBRID III C50 dummy. The patented and manufactured knee and shoulder joints of the KPSIT C50 dummy characterized by a simple structure. The article presents a comparison of the resistance moments in the knee and shoulder joints of the KPSIT C50 dummy before crash tests and after a series of 200 crash tests. It has been shown that the patented solutions that have been used for low-speed crash tests do not need to be calibrated after a series of 5 crash tests, as is the case with the Hybrid III dummy. In addition, the results of experimental research presented in the article confirm the durability of the KPSIT C50 dummies joints and the possibility of using the joints for other centiles of anthropometric dummies.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"73 s312","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139629351","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
A Z-number and MABAC method based on reliability analysis and evaluation of product design concept 基于产品设计概念可靠性分析和评估的 Z 数和 MABAC 方法
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-01-08 DOI: 10.17531/ein/178304
Yuhang Tan, Zhe Chen, Baoping Wang, Qing Ma, Jianing Wei
{"title":"A Z-number and MABAC method based on reliability analysis and evaluation of product design concept","authors":"Yuhang Tan, Zhe Chen, Baoping Wang, Qing Ma, Jianing Wei","doi":"10.17531/ein/178304","DOIUrl":"https://doi.org/10.17531/ein/178304","url":null,"abstract":"Modular design is a significant method for complicated product development. In the context of modular design, involving users in concept assessment boosts a product's appeal but also introduces decision uncertainty and unreliability. As a solution, this paper proposed a hybrid method by integrating expert consensus modeling, attribute weighting, Z-number, and the Multi-Attribute Border Approximation Area Comparison (MABAC) method. Initially, a consensus model is established using consistency theory to determine expert weights, and attribute priorities are determined through the entropy weighting method. Subsequently, the Z-number-based MABAC method ranks the alternatives, determining the optimal solution among them. Using an automated outdoor cleaning vehicle as an example, the proposed method is compared to other techniques. The sensitivity analysis and the comparisons show that the proposed method improves the reliability and objective of the decision-making process.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"70 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535483","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
Milling cutter fault diagnosis using unsupervised learning on small data: A robust and autonomous framework 利用无监督学习对小数据进行铣刀故障诊断：稳健自主的框架
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-01-06 DOI: 10.17531/ein/178274
A. Patange, R. Soman, S. Pardeshi, Mustafa Kuntoglu, W. Ostachowicz
{"title":"Milling cutter fault diagnosis using unsupervised learning on small data: A robust and autonomous framework","authors":"A. Patange, R. Soman, S. Pardeshi, Mustafa Kuntoglu, W. Ostachowicz","doi":"10.17531/ein/178274","DOIUrl":"https://doi.org/10.17531/ein/178274","url":null,"abstract":"Tool condition affects the tolerances and the energy consumption and hence needs to be monitored. Artificial intelligence based data-driven techniques for tool condition determination are proposed. Unfortunately, the data-driven techniques are data-hungry. This paper proposes a methodology for classification based on unsupervised learning using limited unlabeled training data. The work presents a multi-class classification problem for the tool condition monitoring. The principal component analysis (PCA) is employed for dimensionality reduction and the principal components (PCs) are used as input for classification using k-means clustering. New collected data is then projected on the PC space, and classified using the clusters from the training. The methodology has been applied for classification of tool faults in 6 classes. The use of limited input parameters from the user makes the method ideal for monitoring a large number of machines with minimal intervention. Furthermore, due to the small amount of data needed for the training, the method has the potential to be transferable.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"62 51","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139449054","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信