Journal of Mechanical Science and Technology最新文献_第7页

Acoustic-noise reduction in printed circuit boards based on location and direction of multilayer ceramic capacitors 根据多层陶瓷电容器的位置和方向降低印刷电路板中的声噪

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-03 DOI: 10.1007/s12206-024-0704-x

Wheejae Kim, Youngjin Park, Seonbin Lim, Hyungyu Roh, No-Cheol Park

引用次数: 0

Thermal network model of rotary eddy current braking system for transient thermal process analysis 用于瞬态热过程分析的旋转涡流制动系统热网络模型

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-03 DOI: 10.1007/s12206-024-0741-5

Chunjun Chen, Jia Hu, Ji Deng

引用次数: 0

Modeling and analysis of rigid-flexible coupling dynamics of a cable-driven manipulator 电缆驱动机械手的刚柔耦合动力学建模与分析

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-03 DOI: 10.1007/s12206-024-0733-5

Fei Liu, Jinda Luo, Jixue Mo, Changqing Gao, Zhendong Song

引用次数: 0

Four-dimensional (4D) printing through FDM: Effect of infill density and bed temperature on shape memory properties in different thermo-mechanical programming conditions 通过 FDM 进行四维（4D）打印：不同热机械编程条件下填充密度和床温对形状记忆特性的影响

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-03 DOI: 10.1007/s12206-024-0727-3

Bijaya Bikram Samal, Shailendra Kumar Varshney, Cheruvu Siva Kumar

{"title":"Four-dimensional (4D) printing through FDM: Effect of infill density and bed temperature on shape memory properties in different thermo-mechanical programming conditions","authors":"Bijaya Bikram Samal, Shailendra Kumar Varshney, Cheruvu Siva Kumar","doi":"10.1007/s12206-024-0727-3","DOIUrl":"https://doi.org/10.1007/s12206-024-0727-3","url":null,"abstract":"This study investigates the impact of key parameters in fused deposition modeling (FDM), i.e., infill density and bed temperature, on the shape memory properties of four-dimensional (4D) printed shape memory polymer (SMP). Two thermo-mechanical programming methodologies, namely programming during printing (PDP) and programming after printing (PAP), are used to examine their effects too. Increasing the infill percentage greatly improves the ability of the material to regain its original shape. This is achieved by increasing the amount of material and minimizing gaps between layers, which helps to build up the pre-strain, which causes shape morphing. On the other hand, higher bed temperatures decrease the shape recovery by slowing down cooling, decreasing residual strain, and minimizing thermal stresses. Compared to PAP samples, PDP samples show a significant 40 % increase in shape memory index (SMI), indicating the considerable influence of FDM printing rather than post-printing programming process.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141887337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal performance of a packed bed thermocline thermal energy storage system according to the design parameters 根据设计参数确定填料床热电偶储能系统的热性能

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-03 DOI: 10.1007/s12206-024-0737-1

Jeong-Won Han, Bum-Jin Chung

{"title":"Thermal performance of a packed bed thermocline thermal energy storage system according to the design parameters","authors":"Jeong-Won Han, Bum-Jin Chung","doi":"10.1007/s12206-024-0737-1","DOIUrl":"https://doi.org/10.1007/s12206-024-0737-1","url":null,"abstract":"The influence of design parameters on the thermal performance of a packed bed thermocline thermal energy storage (TES) system was analyzed. Both one-dimensional (1D) and two-dimensional (2D) in-house codes were developed in MATLAB environment. The diameter of solid filler, height of storage tank, and fluid velocity were varied. The thermal performance of the system, such as discharging time, thermocline thickness, and energy efficiency was calculated. As the diameter of the solid filler and fluid velocity increased, and the height of the storage tank decreased, the discharging time decreased. As the diameter of the solid filler and the height of storage tank increased, the thermocline generally became thicker. The thermocline thickness according to the fluid velocity showed non-monotonic behavior: initially increasing and then decreasing, since it affected heat transfer coefficient, fluid-solid contact time and discharging time, which affected thermocline expansion. The 2D model exhibited higher energy efficiency than the 1D model, due to the consideration of the additional wall heating to the fluid, resulting in extended discharging time except for very low flow velocities.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141883989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterisation of basalt/glass/kevlar-29 hybrid fibre-reinforced plastic composite material through Nd: YAG laser drilling and optimisation using stochastic methods 通过 Nd: YAG 激光钻孔表征玄武岩/玻璃/Kevlar-29 混合纤维增强塑料复合材料，并使用随机方法进行优化

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-03 DOI: 10.1007/s12206-024-0728-2

Amiya Kumar Sahoo, Dhananjay R. Mishra

引用次数: 0

Elucidation of aerodynamic characteristics due to ice accretion on multi-mw wind turbine blade 阐明多兆瓦风力涡轮机叶片积冰导致的空气动力特性

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-03 DOI: 10.1007/s12206-024-2111-8

Won-Seok Ryoo, Seong-Chul Park, Sang-Hwan Kim, Jae-Ho Jeong

{"title":"Elucidation of aerodynamic characteristics due to ice accretion on multi-mw wind turbine blade","authors":"Won-Seok Ryoo, Seong-Chul Park, Sang-Hwan Kim, Jae-Ho Jeong","doi":"10.1007/s12206-024-2111-8","DOIUrl":"https://doi.org/10.1007/s12206-024-2111-8","url":null,"abstract":"Wind turbines installed in regions with high altitudes and low temperatures on winter season, ice can accumulate on the blade surfaces during operating condition. A small amount of ice accretion on the blade surface can result in several crucial issues, such as AEP (annual energy production) reduction due to degrade aerodynamic performance, and safety concerns related to ice falling down. Predicting and elucidating icing accretion phenomena under various weather conditions are significantly essential in the aspect of operating and maintenance. The primary objective of this study was to assess the impact of ice accretion on the aerodynamic characteristics of wind turbine blades CFD (computational fluid dynamics) analysis, including ice thickness and shape, under varying weather conditions. Therefore, this study focused on identifying the aerodynamic characteristics affected by ice accretion, including ice thickness and shape under various weather conditions through Fensap. Through this methodology, the presence of ice accumulation on the blade surfaces was investigated, and its adverse impact on aerodynamic performance has been assessed.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automated visual inspection of particle defect in semiconductor packaging 对半导体封装中的颗粒缺陷进行自动视觉检测

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-03 DOI: 10.1007/s12206-024-0740-6

Joonsub Park, Jeonghoon Lee

{"title":"Automated visual inspection of particle defect in semiconductor packaging","authors":"Joonsub Park, Jeonghoon Lee","doi":"10.1007/s12206-024-0740-6","DOIUrl":"https://doi.org/10.1007/s12206-024-0740-6","url":null,"abstract":"In semiconductor production processes, controlling and inspecting contamination particle defects are extremely important because even a small particle within any stage of the process can remarkably affect the quality of the final products. Particle contamination can be critically detrimental in every process, thereby reducing production yield in semiconductor processes. In this study, we investigated the correlation between the actual defect rate and the probability of contamination particle defect observed by a commercially available automated visual inspection (AVI) system in semiconductor backend processes. During mass production, we observed that contamination particles produced in a thermal process were transported to various locations and caused defects. Particles sized 45 µm were observed most frequently compared with the actual contamination particles and AVI images. To effectively detect particle defect on wafer surfaces, particles smaller than 100 µm should also be considered. The hallmark of this study is that we effectively controlled particles larger than 50 µm using our AVI equipment after the die attach approach to reduce defects in the wire bonding process in advance. We provide monitoring methods for contamination control of particles present in the thermal process on the AVI system applied in mass production processes. Finally, we suggest a plausible entrainment pathway of the contamination particles and present visual images of actual contamination particles observed using an optical microscope.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of electricity savings in community units through ESS and PV generation using ANN-based prediction model under Korean climatic conditions 利用基于 ANN 的预测模型，比较韩国气候条件下社区单位通过 ESS 和光伏发电节省的电量

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-03 DOI: 10.1007/s12206-024-0739-z

Sung Hyup Hong, Byeongmo Seo, Ho Sung Jeon, Jong Min Choi, Kwang Ho Lee, Donghyun Rim

引用次数: 0

Facile fabrication of superhydrophobic sub-millimetric cone-shape pillars based on a single UV exposure to control drop impact dynamics 基于单次紫外线照射轻松制造超疏水亚毫米锥形柱，控制液滴冲击动力学

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-03 DOI: 10.1007/s12206-024-0722-8

Young-Su Ko, Chiwook Ha, Yun Jung Heo, Choongyeop Lee

引用次数: 0