International Journal for Multiscale Computational Engineering最新文献_第2页

3D hydro-mechanical coupling analysis of dynamic characteristics in saturated roadbed of ballastless high-speed railway 无砟高速铁路饱和路基动态特性的三维水力机械耦合分析

IF 1.4 4区工程技术

International Journal for Multiscale Computational Engineering Pub Date : 2023-12-01 DOI: 10.1615/intjmultcompeng.2023049905

Kaiwen Liu, Yanfei Pei, Pengfei Zhou, Bao Liu, Yang Chen, Tengfei Wang

{"title":"3D hydro-mechanical coupling analysis of dynamic characteristics in saturated roadbed of ballastless high-speed railway","authors":"Kaiwen Liu, Yanfei Pei, Pengfei Zhou, Bao Liu, Yang Chen, Tengfei Wang","doi":"10.1615/intjmultcompeng.2023049905","DOIUrl":"https://doi.org/10.1615/intjmultcompeng.2023049905","url":null,"abstract":"Recent field case study shows that the roadbed of ballastless high-speed railway experienced the water induced disease such as excessive fines pumping and even local subgrade-track contact loss affecting the normal operation of high-speed train due to water immersion through gaps of waterproof materials in expansion joints between the concrete base particularly in rainy seasons. However, the study about the dynamic behavior of high-speed railway subgrade involving water is currently rare. Based on the theory of fluid dynamics in porous medium and the vehicle-track-subgrade coupling vibration theory, a 3D hydro-mechanical finite element model was established to evaluate the dynamic responses of saturated roadbed surface layer under the high-speed train loading with the validation by comparing the calculated values and field data. The temporal and spatial characteristics of dynamic behaviors (stress, pore water pressure, seepage velocity, displacement) of saturated roadbed surface layer are fully discussed. Also, the effects of train velocity, permeability, on aforementioned dynamic responses of the saturated roadbed surface layer are evaluated. The study shows that improving the drainage of ballastless track roadbed has a significant effect on minimizing the ballastless track mud pumping, and the influence zone of hydraulic-mechanical coupling is mainly within 0.1 m of the roadbed.","PeriodicalId":50350,"journal":{"name":"International Journal for Multiscale Computational Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138745649","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

Corrosion Prediction of Mg Implant using Multiscale Modelling based on Machine Learning Algorithms 利用基于机器学习算法的多尺度建模预测镁植入物的腐蚀情况

IF 1.4 4区工程技术

International Journal for Multiscale Computational Engineering Pub Date : 2023-12-01 DOI: 10.1615/intjmultcompeng.2023050288

Santu Mondal, Rahul Samanta, Sahadeb Shit, Arindam Biswas, Atul Bandyopadhyay, Rudra Sankar Dhar, Gurudas Mandal

{"title":"Corrosion Prediction of Mg Implant using Multiscale Modelling based on Machine Learning Algorithms","authors":"Santu Mondal, Rahul Samanta, Sahadeb Shit, Arindam Biswas, Atul Bandyopadhyay, Rudra Sankar Dhar, Gurudas Mandal","doi":"10.1615/intjmultcompeng.2023050288","DOIUrl":"https://doi.org/10.1615/intjmultcompeng.2023050288","url":null,"abstract":"To improve patient outcomes and reduce the social and financial burdens associated with implant failure, ongoing research and development are essential. For that in this study, MLA has been done to predict the corrosion behavior of Mg implant. This includes advancements in implant materials, surgical techniques, infection prevention strategies, and personalized medicine approaches that consider each patient's unique characteristics. Ultimately, the goal is to make orthopedic surgery safer and more effective. The primary focus is to minimize complications like implant failure due to corrosion to enhance the overall quality of life for patients. Infections around orthopedic implants are a major cause of implant failure. These infections can be challenging to treat because the implant’s presence can make it difficult for the body’s immune system to effectively combat the infection. Preventing infection is crucial and often involves strict sterile procedures during surgery. Antibiotics may also be prescribed prophylactically. Inflammation is a natural response to surgery, but excessive inflammation can cause pain and lead to complications, including implant failure. Advanced materials and improved surgical techniques are designed to reduce the likelihood of aseptic loosening. When an implant fails, revision surgery becomes necessary. Implant materials are chosen to minimize corrosion, but it can still occur. Corrosion can lead to wear and damage to the implant, potentially causing inflammation and implant failure. Surgeons and manufacturers continually seek materials with improved resistance to corrosion.","PeriodicalId":50350,"journal":{"name":"International Journal for Multiscale Computational Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139054701","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

Detailed design and analysis for additive manufacturing of topologically optimised and generatively designed Ti-6Al-4V Hip Joint Implant 拓扑优化生成设计的Ti-6Al-4V髋关节植入物增材制造详细设计与分析

IF 1.4 4区工程技术

International Journal for Multiscale Computational Engineering Pub Date : 2023-12-01 DOI: 10.1615/intjmultcompeng.2023050152

Abhishek Kishor, Ramesh Gupta Burela, Ankit Gupta

{"title":"Detailed design and analysis for additive manufacturing of topologically optimised and generatively designed Ti-6Al-4V Hip Joint Implant","authors":"Abhishek Kishor, Ramesh Gupta Burela, Ankit Gupta","doi":"10.1615/intjmultcompeng.2023050152","DOIUrl":"https://doi.org/10.1615/intjmultcompeng.2023050152","url":null,"abstract":"In this paper, a comprehensive investigation for the design and analysis of Ti-6Al-4V hip joint implants using generative design and topology optimisation, along with Laser Powder Bed Fusion (LPBF) additive manufacturing, has been presented. The study employed the NSGA-II genetic algorithm for generative design, enabling the generation of diverse optimised designs and topology optimisation with the SIMP approach, efficiently reducing implant mass of the design space by up to 75% while maintaining structural integrity. Finite Element Analysis revealed comparable levels of von Misses stress and deformation between geometries obtained with generative design and topology optimisation. However, the combined approach exhibited superior performance, namely topology optimisation followed by generative design, with a 40% reduction in deformation and a 15% reduction in von Misses stress compared to conventional models. LPBF simulations demonstrated the superiority of the optimised geometries, with a 30% reduction in thermal stress and a 66% reduction in deformation compared to conventional designs. It is observed that design input for generative design has a significant impact on the output design. Also, geometry has a notable impact on the quality of the printed part.","PeriodicalId":50350,"journal":{"name":"International Journal for Multiscale Computational Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138525442","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

Further development of GDEM for the modelling of multi-scale dynamic response of rock subjected to blasting and impact 进一步开发 GDEM，用于模拟岩石在爆破和冲击作用下的多尺度动态响应

IF 1.4 4区工程技术

International Journal for Multiscale Computational Engineering Pub Date : 2023-12-01 DOI: 10.1615/intjmultcompeng.2023049685

Jianjun Ma, Rui Li, Chenghao Li, Junjie Chen, Yuexiang Lin, Linchong Huang

{"title":"Further development of GDEM for the modelling of multi-scale dynamic response of rock subjected to blasting and impact","authors":"Jianjun Ma, Rui Li, Chenghao Li, Junjie Chen, Yuexiang Lin, Linchong Huang","doi":"10.1615/intjmultcompeng.2023049685","DOIUrl":"https://doi.org/10.1615/intjmultcompeng.2023049685","url":null,"abstract":"The dynamical responses of rock subjected to blasting and impact have been concerned in most underground projects. Due to the size effects and strain rate enhancement induced by inertial effects, the dynamic responses of rock and underground structures show multi-scale characteristics. Thus, in order to achieve better understanding of multi-scale dynamic responses of rocks, both computation accuracy and numerical efficiency have been taken into account. This is achieved by further development of a continuum–discontinuous element method code, called GDEM, with a new type of dynamic bounding surface damage model being implemented, thus forming a bounding surface dynamic plasticity damage-GDEM model (DB-GDEM). Both continuous and discontinuous mechanical behaviours of rocks have been captured well by the newly developed DB-GDEM model. The main multi-scale dynamic characteristics of rock subjected to blasting and impact, including particle movement, fragmentation of rock mass, stress wave propagation, and failure models, have been captured. Good agreement among modelling results and solutions reported in literature demonstrates the capability of DB-GDEM. The introduction of bounding surface plasticity damage model in GDEM would reproduce a more realistic dynamic damage response of rock compared with the original GDEM model that embedded with conventional constitutive models.","PeriodicalId":50350,"journal":{"name":"International Journal for Multiscale Computational Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138819773","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

APPLICATION OF SKELETAL BIOMECHANICS TO STRUCTURAL SYSTEMS 骨骼生物力学在结构系统中的应用

IF 1.4 4区工程技术

International Journal for Multiscale Computational Engineering Pub Date : 2023-12-01 DOI: 10.1615/intjmultcompeng.2023050245

Sindhu Nachiar S, Satyanarayanan K S

{"title":"APPLICATION OF SKELETAL BIOMECHANICS TO STRUCTURAL SYSTEMS","authors":"Sindhu Nachiar S, Satyanarayanan K S","doi":"10.1615/intjmultcompeng.2023050245","DOIUrl":"https://doi.org/10.1615/intjmultcompeng.2023050245","url":null,"abstract":"The concept of green construction enables a revolutionary change in construction sector in terms of design, production, and management. One such method is introducing the concept of biomimicry. Biomimicry is utilized in the field of design to solve problems. This paper mainly discusses about the mimicking of human skeleton for structural design. The idea is mimicking humerus bone as a tension member and femur bone as a compression member. The optimized members of compression and tension (strut and tie) were put together to form the mimicked king post truss analytically with the conventional cross section truss with average diameter, maximum diameter, and equivalent self-weight to the members of mimicked truss and experimentally testing with non-destructive test and point load test.The result shows that the ultimate load carrying capacity of critical compression member and tension member was 846.16 kN and 1952 kN respectively. Whereas, the achieved load was 780.30 kN and 1729 kN.Also, the ratio of analytical stiffness to self-weight is 21.83 mm-1 and the ratio of experimental stiffness to self-weight was 19.15 mm-1. Therefore, from the results it was observed that the equivalent results for mimic truss can be achieved in a truss which is modeled of equivalent self-weight. Hence the development and use of structural elements using biomimicry is feasible and that will lead to economic, green and energy efficient structures.","PeriodicalId":50350,"journal":{"name":"International Journal for Multiscale Computational Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138579177","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

A New Criterion for the Human Knee Osteoarthritis Characterization: Finite Element modelling 人类膝关节骨性关节炎表征的新标准:有限元建模

IF 1.4 4区工程技术

International Journal for Multiscale Computational Engineering Pub Date : 2023-11-01 DOI: 10.1615/intjmultcompeng.2023048267

Zahra TRAD, Abdelwahed BARKAOUI

{"title":"A New Criterion for the Human Knee Osteoarthritis Characterization: Finite Element modelling","authors":"Zahra TRAD, Abdelwahed BARKAOUI","doi":"10.1615/intjmultcompeng.2023048267","DOIUrl":"https://doi.org/10.1615/intjmultcompeng.2023048267","url":null,"abstract":"Osteoarthritis (OA), characterized by the degradation of articular cartilage, is a musculoskeletal disease that occurs as the result of variations in the mechanical stress and strain applied to the knee joint. Since damaged cartilage has very poor intrinsic repair and regenerative capacity, numerical modeling complemented by experimental studies have been widely investigated to examine the causes of OA development. However, the responses of the articular cartilage to a load distributed as a function of knee laxity in the frontal plane have not been studied numerically. Accordingly, we provide in this paper a 3D finite element (FE) model of the knee joint obtained from Magnetic Resonance Imaging (MRI) dataset, in order to assess the biomechanical responses of cartilage. The main goal of this work is to develop a new methodology to quantify the load applied to the knee and to propose a new criterion for characterizing cartilage wear based on arthroscopic and radiological classifications. In the situations of varus and valgus laxity, the FE analysis demonstrated that degenerative cartilage degradation is seen to be larger for higher abnormalities. Moreover, numerical modeling of the new criterion allowed for the identification of OA phases based on the rate of cartilage wear measured for the various FE knee models.","PeriodicalId":50350,"journal":{"name":"International Journal for Multiscale Computational Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138525424","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

Effects of cyclic traffic loads and seawater erosion on suffusion of crushed calcareous sands 循环交通荷载和海水侵蚀对破碎钙质砂渗透的影响

IF 1.4 4区工程技术

International Journal for Multiscale Computational Engineering Pub Date : 2023-11-01 DOI: 10.1615/intjmultcompeng.2023049633

Hao Xiong, Rui Tang, Zhen-yu Yin, Hanqing Chen, Zhimin Zhang, Yuanyi Qiu, Runqi Zhang

{"title":"Effects of cyclic traffic loads and seawater erosion on suffusion of crushed calcareous sands","authors":"Hao Xiong, Rui Tang, Zhen-yu Yin, Hanqing Chen, Zhimin Zhang, Yuanyi Qiu, Runqi Zhang","doi":"10.1615/intjmultcompeng.2023049633","DOIUrl":"https://doi.org/10.1615/intjmultcompeng.2023049633","url":null,"abstract":"Calcareous sands, in contrast to ordinary terrestrial source sands, are characterized by their propensity for fragmentation. This leads to the fracturing of calcareous sands within the foundation under the impact of traffic loads. The crushed calcareous sands then experience suffusion due to cyclic wave action, potentially causing foundation settlement. However, limited research has been conducted on the effects of varying load frequencies and magnitudes on road foundations subjected to cyclic traffic loads. In this study, a series of numerical case studies employing the CFD-DEM method are conducted. The macroscopic and microscopic effects of load magnitude and frequency on fines loss mass, fines loss rate, soil surface displacement, and microstructure are analyzed. The results indicate that as the traffic load magnitude increases and frequency decreases, fines loss mass and volumetric strain of the soil decrease, reducing the suffusion effect on the foundation. These findings provide valuable insights for the development of micromechanical constitutive models for calcareous sands and the design of transportation infrastructure.","PeriodicalId":50350,"journal":{"name":"International Journal for Multiscale Computational Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138525425","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

Multi-Band Flexible UWB Antenna for Flexible Electronics and Biomedical Applications 用于柔性电子和生物医学应用的多波段柔性超宽带天线

IF 1.4 4区工程技术

International Journal for Multiscale Computational Engineering Pub Date : 2023-01-01 DOI: 10.1615/intjmultcompeng.2023046873

P. R., Thamarai Selvi G, Annaram Karuppiah, Venkatalakshmi K, J. M, Banu Priya Prathaban

引用次数: 0

Evaluation of dissipation energy for isotropic continuum damage mechanics model with adaptive time step control approach 基于自适应时间步长控制方法的各向同性连续损伤力学模型耗散能评估

IF 1.4 4区工程技术

International Journal for Multiscale Computational Engineering Pub Date : 2023-01-01 DOI: 10.1615/intjmultcompeng.2023045347

N. Liu, Zifeng Yuan

引用次数: 0

Intramedullary Nail or Locking Compression Plate For Fixing a Fractured Distal Tibia: Finite Element Analysis Along With an Adaptation Model 髓内钉或锁定加压钢板固定胫骨远端骨折:有限元分析及适应模型

IF 1.4 4区工程技术

International Journal for Multiscale Computational Engineering Pub Date : 2023-01-01 DOI: 10.1615/intjmultcompeng.2023048159

G. Rouhi, Amirhosein Moslehi

引用次数: 0