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  • Open Access


    Coupling Effects of the Ballast Track Infrastructure on the Dynamic Response of Structurally Independent Railway Bridges

    J.C. Sánchez‐Quesada1, A. Romero2, P. Galvín2,3, E. Moliner1, M.D. Martínez‐ Rodrigo1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.24, No.1, pp. 1-1, 2022, DOI:10.32604/icces.2022.08691

    Abstract This paper is devoted to track-bridge interaction phenomena in railway bridges of short simply-supported (SS) spans composed by ballasted tracks. These structures may experience high vertical acceleration levels under operating conditions. In particular, the coupling effect exerted by the ballast track shared by structural parts that are theoretically independent, such as consecutive simply-supported spans or twin adjacent single-track decks, is investigated. Experimental evidence shows that in these cases there may be an important vibration transmission from the loaded to the unloaded track, and that the interlocked ballast granules couple some of the lowest modes of vibration to an important extent.… More >

  • Open Access


    A Real-time Cutting Model Based on Finite Element and Order Reduction

    Xiaorui Zhang1,2,*, Wenzheng Zhang2, Wei Sun3, Hailun Wu2, Aiguo Song4, Sunil Kumar Jha5

    Computer Systems Science and Engineering, Vol.43, No.1, pp. 1-15, 2022, DOI:10.32604/csse.2022.024950

    Abstract Telemedicine plays an important role in Corona Virus Disease 2019 (COVID-19). The virtual surgery simulation system, as a key component in telemedicine, requires to compute in real-time. Therefore, this paper proposes a real-time cutting model based on finite element and order reduction method, which improves the computational speed and ensure the real-time performance. The proposed model uses the finite element model to construct a deformation model of the virtual lung. Meanwhile, a model order reduction method combining proper orthogonal decomposition and Galerkin projection is employed to reduce the amount of deformation computation. In addition, the cutting path is formed according… More >

  • Open Access


    Study on the Fire Behavior of Sandwich Wall Panels with GFRP Skins and a Wood-Web Core

    Guangjun Sun, Chuting Wang, Lu Wang*

    Journal of Renewable Materials, Vol.10, No.6, pp. 1537-1553, 2022, DOI:10.32604/jrm.2022.018598

    Abstract To investigate the temperature field and residual bearing capacity of the sandwich wall panels with GFRP skins and a wood-web core under a fire, three sandwich walls were tested. One of them was used for static load test and the other two for the one-side fire tests. Besides, temperature probe points were set on the sandwich walls to obtain the temperature distribution. Meanwhile, the model of the sandwich wall was established in the finite element software by the method of core material stiffness equivalent. The temperature distribution and performance reduction of materials were also considered. The residual bearing capacity of… More >

  • Open Access


    Clinical Data-Driven Finite Element Analysis of the Kinetics of Chewing Cycles in Order to Optimize Occlusal Reconstructions

    Simon Martinez1, Jürgen Lenz1, Hans Schindler1,2, Willi Wendler1, Stefan Rues3, Karl Schweizerhof1,*, Sophia Terebesi2, Nikolaos Nikitas Giannakopoulos2, Marc Schmitter2

    CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1259-1281, 2021, DOI:10.32604/cmes.2021.017422

    Abstract The occlusal design plays a decisive role in the fabrication of dental restorations. Dentists and dental technicians depend on mechanical simulations of mandibular movement that are as accurate as possible, in particular, to produce interference-free yet chewing-efficient dental restorations. For this, kinetic data must be available, i.e., movements and deformations under the influence of forces and stresses. In the present study, so-called functional data were collected from healthy volunteers to provide consistent information for proper kinetics. For the latter purpose, biting and chewing forces, electrical muscle activity and jaw movements were registered synchronously, and individual magnetic resonance tomograms (MRI) were… More >

  • Open Access


    Parametric Study of Hip Fracture Risk Using QCT-Based Finite Element Analysis

    Hossein Bisheh1,2, Yunhua Luo1,3, Timon Rabczuk2,*

    CMC-Computers, Materials & Continua, Vol.71, No.1, pp. 1349-1369, 2022, DOI:10.32604/cmc.2022.018262

    Abstract Various parameters such as age, height, weight, and body mass index (BMI) influence the hip fracture risk in the elderly which is the most common injury during the sideways fall. This paper presents a parametric study of hip fracture risk based on the gender, age, height, weight, and BMI of subjects using the subject-specific QCT-based finite element modelling and simulation of single-leg stance and sideways fall loadings. Hip fracture risk is estimated using the strain energy failure criterion as a combination of bone stresses and strains leading to more accurate and reasonable results based on the bone failure mechanism. Understanding… More >

  • Open Access


    2D Finite Element Analysis of Asynchronous Machine Influenced Under Power Quality Perturbations

    Jasmin Pamela S1 , R. Saranya1 , V. Indragandhi1 , R. Raja Singh1 , V. Subramaniyaswamy2, Yuvaraja Teekaraman3 , Shabana Urooj4,*, Norah Alwadai5

    CMC-Computers, Materials & Continua, Vol.70, No.3, pp. 5745-5763, 2022, DOI:10.32604/cmc.2022.020093


    Asynchronous machines are predominantly preferred in industrial sectors for its reliability. Power quality perturbations have a greater impact on industries; among the different power quality events, voltage fluctuations are the most common and that may cause adverse effect on machine's operation since they are longer enduring. The article discusses a numerical technique for evaluating asynchronous motors while taking into account magnetic saturation, losses, leakage flux, and voltage drop. A 2D linear analysis involving a multi-slice time stepping finite element model is used to predict the end effects. As an outcome, the magnetic saturation and losses are estimated using a modified… More >

  • Open Access


    Mechanical Properties and Constitutive Relationship of the High-Durable Parallel Strand Bamboo

    Yousef Y. Sewar1, Zhancheng Zhang1, Xinmiao Meng1,*, Mohammed Y. Wahan1, Hanxiao Qi1,2, Qahtan M. Al-Shami1,3, Shijiao Luo1

    Journal of Renewable Materials, Vol.10, No.1, pp. 219-235, 2022, DOI:10.32604/jrm.2021.016013

    Abstract Engineered bamboo has recently received lots of attention of civil engineers and professional researchers due to its better mechanical performance than that of softwood timber. Parallel strand bamboo is one important part of engineered bamboo for its excellent durable performance compared to the laminated veneer bamboo. The required curing temperature in hot-pressing process is usually higher than 120°C to reduce the content of nutritional ingredients and hemy cellulose, and to avoid the decay from the environment and insects. Nonetheless, the appearance of engineered bamboo gets darker with the increase of temperature during the hot-pressing process. In order to minimize the… More > Graphic Abstract

    Mechanical Properties and Constitutive Relationship of the High-Durable Parallel Strand Bamboo

  • Open Access


    Fatigue Performance Evaluation for Welded Details in Orthotropic Steel Deck Bridges Using Multi-Scale Finite Element Method

    Rongfeng Chen1, Changqing Miao2,*

    Structural Durability & Health Monitoring, Vol.14, No.3, pp. 205-228, 2020, DOI:10.32604/sdhm.2020.08997

    Abstract In order to study the fatigue properties of rib-to-deck welded connection and rib-to-rib welded connection in orthotropic steel bridge decks, a multi-scale finite element model was set up to analyze the stress distribution characteristics and the load test was conducted on the Taizhou Yangtze River Bridge. Comparing the vehicle test results with the multi-scale finite element model results to verify the accuracy of the finite element simulation for the stress response of two welded details. The results indicated that: The stress at the rib-to-deck welded connection and the rib-to-rib welded connection are the bending stress and the membrane stress, respectively;… More >

  • Open Access


    A New Finite Element Model with Manufactured Error for Additive Manufacturing

    Zhaohui Xia1,2, Zhihao He2, Qifu Wang1, Yingjun Wang2,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 703-720, 2020, DOI:10.32604/cmes.2020.010368

    Abstract Additive manufacturing (AM), adding materials layer by layer, can be used to produce objects of almost any shape or geometry. However, AM techniques cannot accurately build parts with large overhangs, especially for the large features close to horizontal, hanging over the void. The overhangs will make the manufactured model deviate from the design model, which will result in the performance of the manufactured model that cannot satisfy the design requirements. In this paper, we will propose a new finite element (FE) analysis model that includes the manufacturing errors by mimicking the AM layer by layer construction process. In such FE… More >

  • Open Access


    Aspects of Fretting Fatigue Finite Element Modelling

    Kyvia Pereira1, Libardo V. Vanegas-Useche2, Magd Abdel Wahab3, 4, *

    CMC-Computers, Materials & Continua, Vol.64, No.1, pp. 97-144, 2020, DOI:10.32604/cmc.2020.09862

    Abstract Fretting fatigue is a type of failure that may affect various mechanical components, such as bolted or dovetail joints, press-fitted shafts, couplings, and ropes. Due to its importance, many researchers have carried out experimental tests and analytical and numerical modelling, so that the phenomena that govern the failure process can be understood or appropriately modelled. Consequently, the performance of systems subjected to fretting fatigue can be predicted and improved. This paper discusses different aspects related to the finite element modelling of fretting fatigue. It presents common experimental configurations and the analytical solutions for cylindrical contact. Then, it discusses aspects of… More >

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