Article
Mechanics
Xiaodong Tan, Shaobo Yang, Jincai Yang, Jie Li
Summary: This study proposed a method for designing key parameters of rotational centrifugal pendulum vibration absorbers. It found that the linear rotational CPVA had better damping effect than the nonlinear rotational and non-rotational CPVAs, and could reduce the impact on the rotor.
Article
Biotechnology & Applied Microbiology
Andreas M. Seitz, Jonas Schwer, Luisa de Roy, Daniela Warnecke, Anita Ignatius, Lutz Duerselen
Summary: This in vitro biomechanical study indicates that the shock-absorbing ability of the knee joint is lower when meniscal tissue is resected. The findings have significant implications for the rehabilitation of young, meniscectomized patients and the impact of sports activities.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Construction & Building Technology
Hui Pang, Wen Xu, Junwu Dai, Tao Jiang
Summary: Seismic isolation is a technique used to separate building structures from ground motions during earthquakes. However, there is less emphasis on protecting acceleration-sensitive equipment. This study developed a novel variable-frequency rolling pendulum bearing to protect acceleration-sensitive equipment. Shake table tests showed that the proposed device effectively reduced acceleration and displacement responses. The numerical model of the system was also proposed and validated through simulations.
Article
Mechanics
Alessandra Orfeo, Enrico Tubaldi, Alan H. Muhr
Summary: This study investigates the behavior of rubber blocks under combined compression and shear loading through experimental, numerical, and analytical analyses. Experimental data and numerical simulations provide insights into the stress and strain fields within the blocks. Existing analytical theories are evaluated and compared with test and numerical results, revealing the importance of considering the axial shortening effect and proposing an improved theory that better describes the behavior of compressed blocks under shear and flexure.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Acoustics
Yi Zhou, Xiaohui Shi, Wenyi Rao, Dong Guo, Ziyuan Mei
Summary: This study investigates the feasibility of using a single-mass flywheel with a centrifugal pendulum vibration absorber (CPVA) in a dual-clutch transmission (DCT) vehicle. The model calculations show that the bifilar pendulum has the best vibration attenuation performance. By optimizing the parameters, the combination of a single-mass flywheel and optimized bifilar CPVA can meet the no-rattle requirements of the DCT vehicle.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Construction & Building Technology
Yujiang Fan, Jiaxiong Ding, Kai Liao, Huanhuan Huang, Ergang Xiong
Summary: The study found that the mechanical properties of SMA wires tend to deteriorate with the increase of wire diameter, but can still perform well under specific conditions. The designed SMA suspension pendulum damping system showed good control effects and stability, effectively reducing structural vibrations.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Mechanics
V. Acanfora, S. Saputo, A. Russo, A. Riccio
Summary: The research focuses on the feasibility and effectiveness of novel thin additive manufactured hybrid metal/composite lattice structures as lightweight shock absorbing devices. These hybrid structures combine an additive manufactured metal lattice core for energy absorption with a composite skin/cohesive coating for weight reduction, increased stiffness, and strength of the shock absorber. Extensive numerical analysis demonstrated the effectiveness of the proposed lightweight hybrid configuration compared to traditional shock absorbing panels in terms of mass reduction, mechanical, and energy absorption performances.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Zhenyuan Gu, Yahui Lei, Wangping Qian, Ziru Xiang, Fangzheng Hao, Yi Wang
Summary: This paper presents an experimental comparative study on high damping rubber bearings with low shape factor (HDRB-LSF), thick lead-rubber bearings (TLRB), and lead-rubber bearings (LRB). The results show that the HDRB-LSF outperforms the other two bearings in terms of performance.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Multidisciplinary
Zdzislaw Hryciow, Piotr Rybak, Roman Gieleta
Summary: This study presents the results of bench-tests and calculations that demonstrate a direct correlation between the temperature and performance of a two-pipe hydraulic shock absorber. Lower temperatures were found to result in a higher rate of decrease in component resistance, while the energy dissipated in one shock cycle decreased linearly with increasing temperature. Additionally, a method for determining the ideal use temperature of the shock absorber for assumed operating conditions was proposed.
EKSPLOATACJA I NIEZAWODNOSC-MAINTENANCE AND RELIABILITY
(2021)
Article
Engineering, Mechanical
Xu Zheng, Bin Li
Summary: High temperatures and stress relaxation have a significant impact on the sealing performance of rubber, resulting in a decrease in contact stress, especially at elevated temperatures, and a further decrease in contact stress due to stress relaxation behavior.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Civil
Alessandra Orfeo, Enrico Tubaldi, Alan H. Muhr, Daniele Losanno
Summary: This study investigates the mechanical behavior of elastomeric bearings with a low shape factor (LSF), and finds that they can provide an effective solution for three-dimensional seismic isolation of structures, as well as a low-cost isolation system for developing countries. Through material tests and numerical simulations, the study reveals the mechanical performance and response characteristics of these bearings.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Aerospace
Shikun Zheng, Tuanjie Li, Jiang Zhao, Xiaofei Ma, Jialong Zhu, Zhirong Huang, Yingyi Lang
Summary: This study conducts a dynamic analysis of the deployment of a modular truss antenna reflector, obtains the impact forces of the reflector on the boundary through experiments, modifies the dynamic model of the reflector, and predicts the dynamic behavior of the satellite during the deployment process.
INTERNATIONAL JOURNAL OF AEROSPACE ENGINEERING
(2022)
Article
Computer Science, Artificial Intelligence
Helena Lopes, Susana P. Silva, Jose Machado
Summary: Cork-rubber composites can be used for vibration isolation, with a key design requirement being the support of static compressive loads. This study evaluated the use of artificial neural networks for predicting compression modulus, finding that networks with three neurons in the hidden layer were more efficient and had good correspondence with measured results. Various methods of dataset division during different development stages also influenced model performance. Comparisons with other models in the literature showed that the chosen ANN model generally outperformed them for these materials.
NEURAL COMPUTING & APPLICATIONS
(2021)
Article
Polymer Science
Kang Yang, Nannan Qin, Changgeng Zhou, Bing Wang, Haotian Yu, Haotong Li, Haiyun Yu, Hailiang Deng
Summary: In this study, the characteristics of Caprinae horn sheathes were evaluated. It was found that water played a crucial role in achieving balanced dynamic mechanical properties, as hydrated keratin provided large plastic deformation capacity and induced complex fracture mechanisms.
Article
Computer Science, Information Systems
Jong Hwa Kwon, Chang Hee Hyoung, Jung-Hwan Hwang, Hyun Ho Park
Summary: This paper investigates the use of absorbent material to improve the shielding effectiveness of large metallic rooms with apertures or slots. The study includes theoretical formulations, numerical simulations, and experimental measurements to analyze the impact of the absorber on shielding performance. The results show that the absorber is effective in improving shielding effectiveness in the over-moded state of the metallic room where severe standing-waves occur, and the location of the absorber in the room also influences the level of improvement.
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)