Article
Engineering, Mechanical
Xu Niu, Xi Wang, Yunzhuo Lu, Xusheng Zhang, Bingzhi Chen
Summary: Introducing origami patterns to thin-walled tubes effectively enhances energy-absorbing capacity, but further improvement is difficult. This study presents a new approach, using a pre-folded thin-walled tube with a uniform structure as the reference. The reference structure's wall thickness was made non-uniform, thickening regions with larger plastic deformation and thinning regions with smaller plastic deformation. This non-uniform design harmonizes overall deformation, significantly increasing specific energy absorption and decreasing peak crushing force, achieving a superior combination of SEA and PCF.
ACTA MECHANICA SINICA
(2023)
Article
Engineering, Civil
Krishna Prasath Logakannan, Jayaganthan Rengaswamy, S. Kumar, Velmurugan Ramachandran, Dong Ruan
Summary: The deformation and energy absorption characteristics of a novel hybrid tube were investigated using experimental and numerical methods in this study. The presence of an auxetic tube in the hybrid tube was found to alter the deformation mode of the conventional tube and increasing the yield strength of the auxetic tube significantly improved the energy absorption characteristics of the hybrid tube.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Li Teng, Qingtian Deng, Xinbo Li
Summary: Several new honeycomb thin-walled tubes were designed by reducing the wall thickness and increasing the number of webs with consistent quality. The effect of porous type on energy absorption and deformation behavior was studied through low-velocity compression experiment and high-velocity impact finite element simulation. The results show that H0 has better energy absorption, and the RC has 38% higher energy absorption than the R0 by adding web. The deformation modes of each structure were discussed and it was found that thin-walled tubes of PLA material generally cracked at the fiber layer.
Article
Chemistry, Physical
Xiao Liu, Heng Li, Minyue Hu, Biwu Zhu, Chao Xie, Xiaofeng Zhang, Wenhui Liu
Summary: This study investigates the deformation mechanism and texture evolution of pre-twinning AZ31 magnesium alloy under medium temperature with high-speed impact loading. The results show that basal and < c + a > pyramidal slips are the dominant accommodation modes. Increasing the impact pressure promotes the activation of nonbasal slip and the increase in twin density, leading to a decrease in the relative activity of basal slip.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Civil
Ruixian Qin, Xi Wang, Feng Gao, Bingzhi Chen
Summary: This study introduced a novel multi-cell hierarchical hexagon honeycomb structure by changing the topological connection, which enhances energy absorption efficiency and crashworthiness performance. Optimization of wall thickness and length coefficient can improve specific energy absorption and decrease peak crushing force, leading to superior crashworthiness performance. The optimal geometric parameters of the HHHS show significant enhancement and energy absorbing potential, making it a suitable choice for energy absorption considering the balance between crashworthiness and cost.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Weibin Wen, Ming Lei, Yong Tao, Yanping Lian
Summary: A novel bio-inspired hierarchical diamond honeycomb with variable wall thickness (HDH-VT) is proposed to enhance its crashworthiness, showing superior performance compared to regular square honeycomb and traditional HDH in out-of-plane impact. The theoretical models for plateau stress of HDH and HDH-VT are derived and validated.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Lin Shi, Zhenyu Wu, Xiaoying Cheng, Xin Ru, Yanhong Yuan
Summary: This study investigated damage behaviors and residual crashworthiness characteristics of braided composite tubes with transverse pre-impact damages subjected to axial compression through experimental and numerical methods. The results indicated that the damage behavior and residual performance of braided tubes under axial compression were mainly influenced by the distribution of delamination induced by impact.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Wei Yuan, Yanqing Kou, Zhaokang Meng, Shengli Zhu
Summary: A novel honeycomb with arc-curved edge is proposed to enhance the out-of-plane mechanical performance. The impact performance and crashworthiness of the honeycomb are investigated and discussed. Results show that the honeycomb with relatively large central angle has the best crashworthiness performance due to its better energy absorption ability and structural balance.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Manufacturing
Venkat Chilla, D. P. Mondal, G. D. Janaki Ram, M. Mukherjee
Summary: This study aims to improve the mechanical properties of in-situ aluminium foam-filled stainless steel tubes by promoting good bonding between the foam and the tube through electroplating the inner surface of the tube with copper. The results show that copper coating is effective in enhancing the foam-tube bonding, leading to a considerable improvement in the energy absorption capacity of the foam-filled tubes.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Engineering, Electrical & Electronic
Zhen Li, Zhengyang Kang, Xiaoping Su
Summary: This paper proposes an enhanced Modularized Honeycomb-filled Tube (MHT) structure to improve the energy absorption capacity without adding weight. The MHT outperforms the empty tube and Uniform Honeycomb-filled Tube (UHT) in Specific Energy Absorption (SEA). The deformation stability of the MH has a significant effect on the excellent energy absorption capacity of the MHT. Additionally, the study investigates the effects of design parameters on the SEA and discusses the factors influencing the SEA of the MHT. This research provides inspiration for the development of advanced energy absorbers with lighter weight and better energy absorption capacity.
Article
Engineering, Aerospace
Lulu Wei, Xuan Zhao, Qiang Yu, Weidong Zhang, Guohua Zhu
Summary: This study investigates the deformation behavior of star honeycombs under in-plane compression through experiments and numerical simulations. The results show that adjusting micro and macro geometric parameters can significantly enhance deformation stability and energy absorption capacity. The theoretical model established shows good agreement with experimental results, and improved star honeycomb structures exhibit better performance.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Na Li, Lingwei Yang, Chuanyun Wang, M. A. Monclus, Dongfeng Shi, J. M. Molina-Aldareguia
Summary: The addition of Y element in Mg-2 wt.% Y alloy results in a more balanced deformation compared to pure Mg, with different mechanisms of deformation observed in basal slip, twin growth, and prismatic-slip favorable orientation. The high-temperature strengthening in Mg-Y alloy is mainly attributed to dislocation decomposition and Y segregation at stacking faults.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Civil
Sisi Lu, Weitao Ni, Pan Wang, Kaibo Yan, Zhaowei Chen, Xiaolu Cui, Yayun Qi
Summary: An impact finite element model was used to investigate the effects of cell wall thickness, initial impact velocity, and impact direction on the deformation modes and crush characteristic of hexagonal honeycomb structures. The results showed that the structure compressed differently depending on the impact direction, with inward shrinkage occurring in transverse and longitudinal plane impacts, and no inward shrinkage in 60° oblique plane impacts. Empirical formulas for predicting the initial peak force and specific energy absorption were obtained and found to have errors within 10% of the simulation results, indicating their usefulness in crashworthiness predictions for hexagonal honeycomb structures.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Engineering, Mechanical
Sheng Huo, Zhanyuan Gao, Dong Ruan
Summary: This study investigates the crashworthiness of a hybrid tube consisting of an auxetic tube as the outer tube and a conventional tube as the inner tube. The effects of outer tube material and geometry on the deformation mode, force-displacement curve, and energy absorption of the hybrid tubes are discussed.
ENGINEERING FAILURE ANALYSIS
(2022)
Review
Engineering, Manufacturing
Chukwuemeke William Isaac, Fabian Duddeck
Summary: This comprehensive review paper explores the current trends and promising findings of 3D printed energy absorbing structures (EAS) for crashworthiness application. It discusses the mechanical behavior, crushing performance, technological processes, material feedstocks choices, and unique structural designs of 3D printed EAS. The deformation modes of 3D printed EAS under different loading conditions are identified, and suggestions for future complex 3D printed EAS are provided.
VIRTUAL AND PHYSICAL PROTOTYPING
(2022)
Article
Engineering, Civil
Renbing An, Jiacong Yuan, Yi Pan, Duhang Yi
Summary: Traditional timber structures built on sloped land are more susceptible to seismic damage compared to structures built on flat land. The upper portion of the structure is found to be the weak point on sloped land, with potential issues such as tenon failure and column foot sliding.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Elyas Bayat, Federica Tubino
Summary: The current design guidelines for assessing floor vibration performance do not consider the influence of variability in the walking path on the dynamic response of floors. This study investigates the dynamic response of floors under a single pedestrian walking load, taking into account the randomness of the walking path and load. The effectiveness of the current guidelines in predicting floor response is critically assessed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Gao Ma, Chunxu Hou, Hyeon-Jong Hwang, Linghui Chen, Zhenhao Zhang
Summary: Minimizing earthquake damage and improving repair efficiency are the main principles of resilient structures. This study proposed a repairable column with UHPC segments and replaceable energy dissipaters. The test results showed that the columns with UHPC segments and replaceable dissipaters exhibited high strength, deformation capacity, and energy dissipation.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Kartheek S. M. Sonti, Pavan Kumar Penumakala, Suresh Kumar Reddy Narala, S. Vincent
Summary: In this study, the compressive behavior of alumina hollow particles reinforced aluminum matrix syntactic foams (AMSF) was investigated using analytical, numerical, and experimental methods. The results showed that the FE solver ABAQUS could accurately predict the elastic and elastio-plastic behavior of AMSFs. The study also suggested that FE models have great potential in developing new materials and composites under compression loading.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Zheqi Peng, Xin Wang, Zhishen Wu
Summary: In this study, the statistical modeling of fiber-reinforced polymer (FRP) cables using the classic fiber bundle model is explored. The study considers important features of large-scale multi-tendon FRP cables, such as initial random slack and uneven tensile deformation among tendons. A parametric study and reliability analysis are conducted to predict the load-displacement relation and design thousand-meter-scale FRP cables. The study emphasizes the relation between the reliability index beta of the cable and the safety factor gamma of the FRP material.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Yanchao Shi, Shaozeng Liu, Ye Hu, Zhong-Xian Li, Yang Ding
Summary: This paper introduces a damage assessment method for reinforced concrete (RC) columns under blast loading, using modal parameter measurement as the evaluation index. The validity of the proposed method is validated through numerical and experimental analysis. The results show that this modal-based damage assessment method is applicable for non-destructive evaluation of blast-induced damage of RC columns.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Xiaolin Zou, Maosheng Gong, Zhanxuan Zuo, Qifang Liu
Summary: This paper proposes an efficient framework for assessing the collapse capacity of structures in earthquake engineering. The framework is based on an accurate equivalent single-degree-of-freedom (ESDOF) system, calibrated by a meta-heuristic optimization method. The proposed framework has been validated through case studies, confirming its accuracy and efficiency.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jie Hu, Weiping Wen, Chenyu Zhang, Changhai Zhai, Shunshun Pei, Zhenghui Wang
Summary: A deep learning-based rapid peak seismic response prediction model is proposed for the most common two-story and three-span subway stations. The model predicts the peak seismic responses of subway stations using a data-driven approach and limited information, achieving good predictive performance and generalization ability, and demonstrating significantly higher computational efficiency compared to numerical simulation methods.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jin Ho Lee, Jeong-Rae Cho
Summary: A simplified model is proposed to estimate the earthquake responses of a rectangular liquid storage tank considering the fluid-structure interactions. The complex three-dimensional structural behavior of the tank is represented by a combination of fundamental modes of a rectangular-ring-shaped frame structure and a cantilever beam. The system's governing equation is derived, and earthquake responses such as deflection, hydrodynamic pressure, base shear, and overturning moment are obtained from the solution.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
W. J. Lewis, J. M. Russell, T. Q. Li
Summary: The work discusses the key features and advantages of optimal 2-pin arches shaped by statistically prevalent load and constant axial stress. It extends the design space of symmetric arches to cover asymmetric forms and provides minimum values of constant stress for form-finding of such arches made of different materials. The analysis shows that constant stress arches exhibit minimal stress response and have potential implications for sustainability and durability of future infrastructure.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Wen-ming Zhang, Han-xu Zou, Jia-qi Chang, Tian-cheng Liu
Summary: Saddle position is crucial in the construction and control of suspension bridges. This study proposes an analytical approach to estimate the saddle positions in the completed bridge state and discusses the calculation under different definitions. The relationship between the saddle position and the tower's centerline is analyzed, along with the eccentric compression of the tower. The feasibility of the proposed method is verified through a real-life suspension bridge.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Shaise K. John, Alessio Cascardi, Yashida Nadir
Summary: This study experimentally investigated the use of TRM material for reinforcing concrete columns. The results showed that increasing the number of textile layers effectively increased the axial strength. Additionally, the choice of fiber type and hybrid textile configuration also had a significant impact on strength improvement. A new design model that considers the effects of both the confining matrix and textile was proposed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chandrashekhar Lakavath, S. Suriya Prakash
Summary: This study experimentally investigated the shear behavior of post-tensioned UHPFRC girders, considering factors such as prestress level, fiber volume fraction, and types of steel fibers. The results showed that increasing prestress and fiber dosage could enhance the ultimate load-carrying capacity of the girders, reduce crack angle, and increase shear cracking load.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Vahid Goodarzimehr, Siamak Talatahari, Saeed Shojaee, Amir H. Gandomi
Summary: In this paper, an Improved Marine Predators Algorithm (IMPA) is proposed for size and shape optimization of truss structures subject to natural frequency constraints. The results indicate that IMPA performs better in solving these nonlinear structural optimization problems compared to other state-of-the-art algorithms.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chun-Xu Qu, Jin-Zhao Jiang, Ting-Hua Yi, Hong-Nan Li
Summary: In this paper, a computer vision-based method is proposed to monitor the deformation and displacement of building structures by obtaining 3D coordinates of surface feature points. The method can acquire a large number of 3D coordinates in a noncontact form, improve the flexibility and density of measurement point layout, and is simple and cost-effective to operate.
ENGINEERING STRUCTURES
(2024)
