Article
Engineering, Mechanical
Mingpo Zheng, Zhifeng Liu, Magd Abdel Wahab, Xing Yan, Wentao Chen, Chao Li
Summary: The influence of various factors on the mechanical properties of bolted joints was investigated using finite element analysis. Different analysis steps were considered to simulate the actual assembly and loading process. The results showed different stages of performance under transverse loading, which agrees with previous experimental results. The force-displacement curves provided parameters for characterizing the mechanical properties of the bolted joint.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Mechanics
Hao Qu, Dongsheng Li, Rupeng Li, Ende Ge, Yunong Zhai
Summary: A progressive damage model combining the 3D Hashin criterion and exponential material degradation was developed and validated based on experimental results. The present model was used to investigate the effect of forced assembly on stress distribution and bearing damage in single-lap, countersunk composite bolted joints. It was found that joints with forced assembly exhibited higher contact stress levels. The stress distribution in the countersunk hole was more uniform, while the non-countersunk hole showed uneven stress distribution with maximum contact stress occurring at that location. Furthermore, forced assembly introduced additional axial tensile load on the bolt, leading to higher risk of failure. The most severe damage, including fiber compressive damage and in-plane matrix compressive damage, was transferred from the countersunk hole to the non-countersunk hole.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Jie Liu, Tong Guo, Yang Wei, Libin Wang, Xingxing Zou
Summary: This paper examines the influence of pre-tightening forces on bolted connections for double-lap FRP-steel joints. Experimental tests and finite element analysis were conducted, and it was found that the load capacity of the specimens was significantly affected by the pre-tightening forces. The highest loading capacity was recorded for the specimen with a preloading of 6 N.m, and a pretightening coefficient of 750 m(-1) was determined through FE analysis.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Materials Science, Composites
Jianwei Shi, Xiaodong Yang, Xishuai Chen, Kou Du, Cheng Li, Yaxu Yang
Summary: This study investigates the load-bearing performance of plain-woven CFRP laminates HBB joints under quasi-static uniaxial tensile conditions through tests and simulations, and systematically analyzes the influence of HBB morphological parameters. The 3D Hashin failure criterion is successfully implemented for failure analysis.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Composites
Yuling Tang, Yuhe Ren, Wei Zhao, Zhengong Zhou, Lu Han
Summary: This paper investigates the mechanical properties of all-C/C composite hybrid bonded/bolted joints using experiments and numerical simulations. The results reveal that the failure mode of all-C/C composite mechanical joints is bolt shear failure, while the failure mode of the bonded joints is cohesive force failure. The 3D progressive damage finite element model proposed in this study accurately predicts the failure process and strength of hybrid (bonded/bolted) joints. Furthermore, the study demonstrates that the bolt diameter and adhesive layer modulus have significant impacts on the mechanical properties of the joints.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Construction & Building Technology
Xue-Mei Lin, Michael C. H. Yam, Ke Ke, Qun He, Kwok-Fai Chung
Summary: This study presents an investigation of the block shear strength of high strength steel bolted connections under double shear through experimental and numerical methods. The study comprehensively examines the effects of material properties on block shear strength and evaluates the accuracy of existing design equations for predicting block shear strength.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Engineering, Civil
Feng Xiong, Prafulla Malla, Amir Si Larbi, Gaochuang Cai, Yachao Zhong, Rana Faisl Tufail, Wen Chen, Wei Huang
Summary: This paper investigates the seismic performance of precast concrete shear walls with horizontal bolted joints. A fiber-based finite-element analysis model was developed to simulate the seismic behavior and a simplified model was proposed to predict the ultimate capacity of the walls with bolted connections.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Materials Science, Composites
S. Z. H. Shah, P. S. M. Megat-Yusoff, Tahir Sharif, Z. Sajid, S. M. Hussnain, R. S. Choudhry
Summary: The paper presents a comprehensive study on the performance of resin-infused thermoplastic 3D fibre-reinforced composite lap joints under different configurations. The resin-infused thermoplastic joints show improved bearing performance and reduced damage severity compared to thermoset counterparts. The study also provides insights into the damage mechanisms at the submicron level.
POLYMER COMPOSITES
(2023)
Article
Engineering, Multidisciplinary
Wenchao Xu, Dengfeng Wang
Summary: This study aimed to provide a lightweight solution for wheels using multiple materials. By designing a carbon fiber reinforced polymer (CFRP) rim structure and conducting optimization, the fatigue and impact performance of the assembled wheel were improved.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Automation & Control Systems
Ayaka Murai, Tadatoshi Watanabe, Masahiro Fukuda, Shinji Hashimura
Summary: To design mechanical structures with desired functionality, it is important to understand the parameters that affect the shear stiffness characteristics of bolted joints subjected to shear load. This study investigated the behaviors of a bolted joint under shear load and primary parameters that determine its shear stiffness characteristics. The results showed that the shear stiffness slightly increased with an increase in clamp force, but was not influenced by the number of loading cycles. It was also observed that the rotational deformation in the bolted joint increased significantly after slippage occurred.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Civil
Zhe Xiong, Anyang Chen, Lexian Chen, Yinglei Li, Jianian He, Lijuan Li, Xiaozhou Zou, Yu Qiu, Yunhai Luo
Summary: This paper presents a study on bolted ball-cylinder (BBC) joint, using finite element analysis to investigate the structural behavior, verifying the model's reliability through experimental results, and proposing empirical formulas to predict the ultimate load capacity.
Article
Mechanics
Mohammad S. Rouhi, Dimitra Ramantani, Tong Earn Tay
Summary: This research paper presents an experimental test setup and a 3D physically-based progressive damage model to predict the failure load of hybrid bolted joints between composite materials and metals. The study shows that numerical models can be used to aid in the design of stiffness and strength in bolted joints.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Chemical
Lanxin Jiang, Dawei Dong, Shoune Xiao, Dongdong Chen, Bing Yang, Guangwu Yang, Tao Zhu
Summary: This study analyzed the force-displacement curves, failure modes, and strains of bonded, bolted, and hybrid CFRP joints through both experiments and simulations. The results showed that the hybrid joints had higher strength and stiffness, lesser degree of failure, and improved load distribution.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2022)
Review
Engineering, Mechanical
Zhenjing Duan, Changhe Li, Wenfeng Ding, Yanbin Zhang, Min Yang, Teng Gao, Huajun Cao, Xuefeng Xu, Dazhong Wang, Cong Mao, Hao Nan Li, Gupta Munish Kumar, Zafar Said, Sujan Debnath, Muhammad Jamil, Hafiz Muhammad Ali
Summary: Cutting force plays a crucial role in material removal and workpiece surface integrity during aircraft aluminum alloy milling, and establishing a prediction model is essential for determining machining accuracy. Future research should focus on high-speed milling, instantaneous cutting force modeling, establishing a database, and the impact of chatter on the prediction accuracy of cutting force.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Jacek Mucha, L'ubos Kascak, Waldemar Witkowski
Summary: This research analyzed the forming process of CR joints using AW 6082 and AW 5754 aluminum alloy sheets. The experiments showed that the arrangement with two 5754-H24 aluminum alloy sheets resulted in the highest value of blocking the upper sheet. The study also calculated the total energy of failure and energy needed to achieve the maximum load capacity for the joints.
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)