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  • Open Access


    Quantifying Solid Solution Strengthening in Nickel-Based Superalloys via High-Throughput Experiment and Machine Learning

    Zihang Li1,#, Zexin Wang1,#, Zi Wang2, Zijun Qin1, Feng Liu1, Liming Tan1,*, Xiaochao Jin3,*, Xueling Fan3, Lan Huang1

    CMES-Computer Modeling in Engineering & Sciences, Vol.135, No.2, pp. 1521-1538, 2023, DOI:10.32604/cmes.2022.021639

    Abstract Solid solution strengthening (SSS) is one of the main contributions to the desired tensile properties of nickel-based superalloys for turbine blades and disks. The value of SSS can be calculated by using Fleischer’s and Labusch’s theories, while the model parameters are incorporated without fitting to experimental data of complex alloys. In this work, four diffusion multiples consisting of multicomponent alloys and pure Ni are prepared and characterized. The composition and microhardness of single γ phase regions in samples are used to quantify the SSS. Then, Fleischer’s and Labusch’s theories are examined based on high-throughput experiments, respectively. The fitted solid solution… More >

  • Open Access


    A Review on Strengthening of Timber Beams Using Fiber Reinforced Polymers

    Bingyu Jian1,2, Ke Cheng3, Haitao Li1,2,*, Mahmud Ashraf2,4, Xiaoyan Zheng1,2, Assima Dauletbek1,2, Mahdi Hosseini1,2, Rodolfo Lorenzo5, Ileana Corbi6, Ottavia Corbi6, Kun Zhou7

    Journal of Renewable Materials, Vol.10, No.8, pp. 2073-2098, 2022, DOI:10.32604/jrm.2022.021983

    Abstract Fiber reinforced polymer (FRP) has been used in the construction industry because of its advantages such as high strength, light weight, corrosion resistance, low density and high elasticity. This paper presents a review of bonding techniques adopted to strengthen timber beams using FRP to achieve larger spans. Different methods of bonding between FRP and timber beams have been summarized with a focus on the influencing factors and their effects as well as relevant bond-slip models proposed for fundamental understanding. Experimental investigations to evaluate the flexural performance of timber beams strengthened by FRP bars, sheets and wraps have also been critically… More > Graphic Abstract

    A Review on Strengthening of Timber Beams Using Fiber Reinforced Polymers

  • Open Access


    A Study on the Effect of Core Strength Strengthening Training on Exercise-Induced Lumbar Injuries

    Xianghui Li*

    Molecular & Cellular Biomechanics, Vol.19, No.2, pp. 105-114, 2022, DOI:10.32604/mcb.2022.018736

    Abstract Objective: This study aims to analyze the effect of core strength strengthening training on exercise-induced lumbar injuries. Methods: Sixteen athletes suffering from lumbar injuries were randomly divided into two groups, group A and group B. Group A performed core strength strengthening training, while group B only performed normal study and life. Before and after the experiment, the Visual Analogue Scale (VAS) score, lumbar spine mobility, Oswestry Disability Index (ODI) and overall effect evaluation of the two groups were recorded and compared. Results: After the experiment, the VAS score of group A decreased to 2.78 ± 1.89 points, the anterior flexion… More >

  • Open Access


    “Lifting More” is Associated with Lower Risks of Depression in University Students

    Kang Ai1, Kimberley Curtin2, Kaja Kastelic3,4, Cain Clark5, Si-Tong Chen6, Xinli Chi7,*

    International Journal of Mental Health Promotion, Vol.23, No.4, pp. 471-485, 2021, DOI:10.32604/IJMHP.2021.016473

    Abstract Research on the population in western world showed that, MSE (muscle-strengthening exercise) is beneficial to the treatment of mental disorders. However, the situation in Chinese adults is little known. For this reason, the study is performed to understand the connection between depression and MSE among college and university students in China aged between 18 to 24.1793 college students have been recruited, and their average age is 20.67. A questionnaire has been developed and it is self-reported and designed to collect information about MSE and participants, including body mass index and sex and so on. Sleep and physical activity have been… More >

  • Open Access


    Strengthening Software Make vs. Buy Decision: A Mixed-Method Approach

    Farooq Javeed1, Basit Shahzad2, Asadullah Shaikh3, Mana Saleh Al Reshan3,*, Saba Ahmad1, Hani Alshahrani3, Khairan Rajab3

    Intelligent Automation & Soft Computing, Vol.32, No.1, pp. 193-205, 2022, DOI:10.32604/iasc.2022.021769

    Abstract Over the past few decades, multiple software development process models, tools, and techniques have been used by practitioners. Despite using these techniques, most software development organizations still fail to meet customer’s needs within time and budget. Time overrun is one of the major reasons for project failure. There is a need to come up with a comprehensive solution that would increase the chances of project success. However, the “make vs. buy” decision can be helpful for “in time” software development. Social media have become a popular platform for discussion of all sorts of topics, so software development is no exception.… More >

  • Open Access


    Muscle-Strengthening Exercise Links with Lower Odds for Depression in Adolescents

    Weijun Yu1,2, Jiangang Sun3, Ying Wu1,*, Si-Tong Chen4

    International Journal of Mental Health Promotion, Vol.23, No.2, pp. 277-288, 2021, DOI:10.32604/IJMHP.2021.016153

    Abstract Purpose: Physical activity is a well-recognized protective factor against depression in adolescents. As a component of physical activity, muscle strengthening exercise (MSE) is also viewed as a correlate associated with lower risks of depression in adults. However, little is known about the association in adolescents. This study aimed to explore the association between MSE and depression in a sample of Chinese adolescents. Method: A self-reported questionnaire was used for data collection including variables of MSE, depression (assessed by Children’s Depression Inventory) and selected sociodemographic factors (e.g., sex, grade, height and weight [for body mass index]). Generalized Linear Models was utilized… More >

  • Open Access


    Effect of Al2O3 Nanoparticle on Cavitation Strengthening of Magnesium Alloys

    Lei Liu*, Chuanhui Huang, Xinghua Lu, Ping Yu, Longhai Li, Huafeng Guo

    FDMP-Fluid Dynamics & Materials Processing, Vol.17, No.2, pp. 501-509, 2021, DOI:10.32604/fdmp.2021.015161

    Abstract In order to study the effect of Al2O3 nanoparticles in the cavitation-based strengthening process of magnesium alloys, the impact of a micro-jet generated by bubble collapse has been considered. The strengthening mechanism is based on the transfer of the energy of cavitation due to bubble collapse to Al2O3 particles, which then undergo collision with the surface of the sample. The hardness, surface morphology, element content and chemical state of the strengthened samples have been analyzed by microhardness tests, SEM (scanning electron microscopy) and XPS (X-ray photoelectron spectroscopy) techniques. The results show that: after 5 min of strengthening, nanoparticles can be… More >

  • Open Access


    Symmetric Notches Cause Strengthening in Brittle Metallic glasses

    Yun Teng1, Zhendong Sha1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.23, No.1, pp. 18-18, 2021, DOI:10.32604/icces.2021.08471

    Abstract For all engineering materials, the flaws are introduced inevitably from fabrication, mechanical damage, and corrosion. These stress raisers always induce catastrophic failures and it is therefore of great importance to understand the effect of flaws on the mechanical properties of engineering materials. The effect of flaws on metallic glasses (MGs) is a debatable topic because many relevant works have reported notch strengthening, notch weakening and notch insensitivity for brittle MGs. The significant notch strengthening of MGs was attributed to the transition of failure mechanism, from catastrophic shear banding to ductile fracture. Here we investigate systematically the influence of notch geometry… More >

  • Open Access


    Review on Bond Properties between Wood and Fiber Reinforced Polymer

    Zhen Wang1, Haitao Li1,2,*, Rodolfo Lorenzo3, Ileana Corbi4, Ottavia Corbi4, Changhua Fang2

    Journal of Renewable Materials, Vol.8, No.8, pp. 993-1018, 2020, DOI:10.32604/jrm.2020.012488

    Abstract Retrofitting of existing ancient and modern timber structures has been an important project recently. And it triggers a need of excellent strengthening methods, so does the strengthening of newly built architecture. Traditional strengthening methods have shortcomings such as high costing and destroying the aesthetic of the structure, many of which can be overcome by means of using fiber reinforced polymer (FRP) composites. However, the behavior of FRP-towood systems has yet to be thoroughly researched compared with their FRP-toconcrete or FRP-to-steel counterparts. As FRP retrofitting and strengthening timber structures has a promising future, better understanding of their failure modes will enable… More >

  • Open Access


    Failure Load of Frp Strengthened Masonry Walls: Experimental Results and Numerical Models

    G. Milani1, T. Rotunno2, E. Sacco3, A. Tralli1,4

    Structural Durability & Health Monitoring, Vol.2, No.1, pp. 29-50, 2006, DOI:10.3970/sdhm.2006.002.029

    Abstract Aim of the present work is the evaluation of the ultimate load bearing capacity of masonry panels reinforced with FRP strips. The investigation is developed performing both experimental and numerical studies. In particular, several panels subjected to different loading conditions are tested in the Tests Laboratory of the University of Florence (Italy). Then, numerical models based on combined homogenization and limit analysis techniques are proposed. The results obtained by numerical simulations are compared with experimental data. The good agreement obtained shows that the proposed numerical model can be applied for the evaluation of the ultimate load bearing capacity of reinforced… More >

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