Article
Mechanics
Shilong Wang, Min Zhang, Yao Wang, Zhilai Huang, Yuan Fang
Summary: The mechanical performance of the PLA-RHFDCT was studied experimentally, highlighting the crucial influence of tube sizes and the mesostructures of honeycomb cores on its crushing resistance and energy absorption capacity.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Lijun Xiao, Xiao Xu, Genzhu Feng, Shi Li, Weidong Song, Zhaoxiu Jiang
Summary: A hybrid lattice cell configuration combining an octet cell and a rhombic dodecahedron (RD) cell was proposed to achieve superior mechanical performance and energy absorption capacity. Experimental and numerical results demonstrated that the hybrid structure outperforms the individual octet and RD lattice structures in terms of energy absorption, and its performance can be further enhanced by tuning the mesoscopic architectures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Jie Chen, Haiyang Wei, Kuo Bao, Xianfeng Zhang, Yang Cao, Yong Peng, Jian Kong, Kehong Wang
Summary: The study utilized the cold metal transfer (CMT) process to fabricate 316L stainless steel and compared its dynamic characteristics with annealed wrought 316L, finding that CMT 316L exhibited higher yield strength and flow stress at small strains due to a special cellular structure in the matrix. The study also showed that the average twin thickness of CMT 316L decreased with the increase of strain rates during dynamic compressions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Multidisciplinary
Martin Bihr, Gregoire Allaire, Xavier Betbeder-Lauque, Beniamin Bogosel, Felipe Bordeu, Julie Querois
Summary: This paper focuses on shape and topology optimization of parts and supports in the context of metal powder bed additive manufacturing. The process complexity is simplified using the inherent strain model, which allows for computationally efficient optimization. Three optimization criteria are proposed to minimize defects caused by additive manufacturing, and a compliance constraint is included to ensure the final performance of the part. The numerical results are validated through experimental testing and are used to calibrate the inherent strain model.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Civil
Zhuang Cui, Jiayun Zhao, Rong Xu, Yuanyuan Ding, Zhengping Sun
Summary: Hybrid lattice structures combining the lightweight characteristics of rod structures with the robust mechanical properties of plate structures have been proposed and fabricated. The mechanical properties of these structures can be fine-tuned by adjusting geometric parameters. The study also highlights the ability to regulate the mechanical properties of these structures by adjusting plate thickness, rod diameter, and excavated hole diameter.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Manufacturing
Yutao Zhang, Wurikaixi Aiyiti, Shu Du, Ru Jia, Houfeng Jiang
Summary: Two novel tantalum lattice structures, the imitation saddle surface (ISS) and the imitation arch bridge telescopic (IABT) structures, were designed and fabricated using selective laser melting (SLM). Quasi-static compression tests and finite element analysis were conducted to investigate the mechanical properties and deformation behavior of the lattice structures. The results showed that the ISS lattice structure had a higher yield-stress-to-elastic-modulus ratio, indicating its potential for bone implant applications.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Article
Engineering, Manufacturing
Oliver Uitz, Rui Leng, Tan Pan, Xiaoyue Zhao, Ademola Oridate, Carolyn Seepersad, Zoubeida Ounaies, Mary Frecker
Summary: Reactive extrusion additive manufacturing (REAM) is a process that combines and deposits multi-part thermoset resin to create layered parts with motion-controlled nozzle. By mixing different resins, it is possible to customize the material structure and resulting properties of the parts. This research focuses on a two-part shape memory polymer with magneto-active iron oxide particles added, and investigates the effect of functional grading on the magneto-active properties of the shape memory polymer. Analytical models are derived to predict the magnetic field-responsive behavior of the thermoset composites.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Industrial
Markus Bambach, Irina Sizova, Joanna Szyndler, Jennifer Bennett, Greg Hyatt, Jian Cao, Thomas Papke, Marion Merklein
Summary: This study investigates the hot working behavior of Ti-6Al-4 V samples produced using DEO and SLM methods, highlighting differences in flow stress and microstructure evolution between conventional and AM materials. A model is proposed to predict flow stresses and microstructure evolution in Ti-6Al-4 V specimens with conventional and AM microstructures, which takes the spatial arrangement into account. These findings can be utilized to design new process chains for single-stage net-shape forging of Ti-6Al-4 V parts with reduced forming forces and improved mechanical properties.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Acoustics
J. Carbajo, J. M. Molina-Jorda, L. P. Maiorano, N. X. Fang
Summary: The use of additive manufacturing technology for the fabrication of macro-perforated porous media can improve sound absorption performance, with experimental results in good agreement with theoretical predictions.
Article
Chemistry, Multidisciplinary
Yinglun Hong, Itxaso Azcune, Alaitz Rekondo, Tianhui Jiang, Shitong Zhou, Tristan Lowe, Eduardo Saiz
Summary: This study developed printable ink formulations for direct ink writing of epoxy vitrimer-based composites, using hexagonal boron nitride platelets to enhance fracture resistance and thermal conductivity through alignment during the printing process.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
N. Resnina, I. A. Palani, S. Belyaev, S. S. Mani Prabu, P. Liulchak, U. Karaseva, M. Manikandan, S. Jayachandran, V Bryukhanova, Anshu Sahu, R. Bikbaev
Summary: The study utilized GMAW and WAAM processes to deposit NiTi alloy on a Titanium substrate, evaluating the heterogeneity in terms of microstructure and composition across different layers, and analyzing its influence on martensitic transformation temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Engineering, Manufacturing
Chukwuemeke William Isaac, Fabian Duddeck
Summary: 4D printing technology has opened up new possibilities in crashworthiness application. Energy-absorbing structures with fixed shapes and irreversible deformations can recover their initial shapes, properties, and functionalities after deformation, thanks to external stimuli. This survey explores the progress of shape memory/recovery energy-absorbing metamaterials (EAMM) and energy-absorbing smart/intelligent structures (EASS). The introduction provides fundamental concepts of metamaterials and their application in energy-absorbing structures. The survey then highlights common 3D printing technologies that have enabled the development of 4D printed EAMM and EASS. Shape memory materials, their properties, and recovery processes are discussed, followed by the presentation of various recoverable/reversible energy absorbers and their future challenges and prospects. Well-designed 4D printed EAMM and EASS offer reusability with minimal maintenance and increased energy absorption capacity.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
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, Manufacturing
I Ponikarova, I. A. Palani, P. Liulchak, N. Resnina, S. Singh, S. Belyaev, S. S. Mani Prabu, S. Jayachandran, V Kalganov, Anshu Sahu, R. Bikbaev, U. Karaseva
Summary: The study found that the substrate and arc voltage have significant influence on the structure and functional properties of NiTi shape memory alloy produced by wire arc additive manufacturing. Ni-rich NiTi walls deposited on a Ti substrate demonstrated shape memory behavior at high temperatures, while NiTi samples deposited on a steel substrate were completely suppressed in martensitic transformation and shape memory effects due to high Fe concentration. Increasing arc voltage impacted the volume fraction of Ti2Ni precipitates, leading to decreased strain and increased likelihood of crack formation during deformation.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Ceramics
Yurun Feng, Xue Guo, Kai Huang, Hamada Elsayed, Giorgia Franchin, Hongyu Gong, Paolo Colombo
Summary: SiOC ceramics synthesized by the polymer-derived method exhibit excellent EMW absorption properties, with the presence of free carbon and beta-SiC nanocrystallites significantly enhancing their absorption characteristics. 3D printing technology can be used to create structures with optimal absorption performance, aiding in the improvement and optimization of absorbing material selection in practical applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Engineering, Mechanical
Li Ding, Chao Yu, Xu Zhang, Zefeng Wen, Qianhua Kan, Guozheng Kang
Summary: Experimental observations indicate that the torsional deformation of copper micro-wires is influenced by sample and grain size. In this study, a higher-order strain gradient constitutive model is developed based on the cyclic plastic J2 flow rule to explain the size effect in torsional deformation of copper micro-wires. A new kinematic hardening evolution rule is proposed considering the coupling effect of sample and grain sizes. Numerical implementation is accomplished using a finite element iterative algorithm, and the proposed model is validated using the finite element software ABAQUS. Simulation results show that the proposed model effectively captures the size-dependent torsional deformation of copper micro-wires. This research lays a solid foundation for the combination of strain gradient plasticity theory and cyclic plasticity constitutive model.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Mechanics
Peilin Fu, Jizhong Zhao, Xu Zhang, Hongchen Miao, Zefeng Wen, Guozheng Kang, Qianhua Kan
Summary: A three-dimensional tractive rolling contact analysis is conducted on functionally graded coating-substrate systems. The surface frictional anisotropy is described by Coulomb's orthotropic friction law, and the discontinuous transmissions of stress and displacement at the coating-substrate interface are modeled by a coupled dislocation-like and force-like interfacial imperfection. A multi-layered model is used to simulate the coating with arbitrarily varying thermo-elastic properties, and numerical methods are employed to obtain the thermo-elastic responses of tractive rolling contact. The results show the effect of friction coefficients and interfacial imperfections on traction and stress distribution.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Ni Ao, Han Zhang, Huihui Xu, Shengchuan Wu, Dong Liu, Pingguang Xu, Yuhua Su, Qianhua Kan, Guozheng Kang
Summary: This study investigated the fatigue crack growth (FCG) behavior of a structurally gradient axle steel with different pre-crack depths in air and a corrosive medium. The results showed that corrosion significantly accelerated the FCG rate in the high Delta K region, but the effect weakened as Delta K decreased. The accelerated corrosion FCG rate was influenced by anodic dissolution, hydrogen-enhanced localized plasticity and corrosion-induced crack-tip blunting. Despite the decreasing corrosion resistance with increasing pre-crack depth, the FCG rate in the corrosive medium gradually decreased due to the dominant role of fatigue loading in accelerating corrosion FCG rate.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Mechanics
Junjie Liu, Yuhong Li, Zhouhu Jiang, Qifang Zhang, Nan Hu, Guozheng Kang, Shaoxing Qu
Summary: This study presents an experimental methodology to investigate the interfacial fatigue fracture of elastomer bilayers under cyclic large deformation. The relationship between the interfacial fatigue crack propagation speed and the energy release rate is obtained, revealing three distinct regions: crack initiation, stable crack propagation, and catastrophic crack propagation regions. The findings suggest that the interfacial fatigue fracture of elastomer bilayers can be alleviated by designing the structure of the bonding interface or the bonding edge.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Ziyi Wang, Shengchuan Wu, Yu Lei, Hang Li, Chao Yu, Kun Zhou, Xiqiao Feng, Guozheng Kang
Summary: This paper presents a novel mesoscopic damage model to characterize the low-cycle fatigue damage evolution of an extruded AZ31 magnesium alloy, taking into account the effect of twinning. The damage caused by the slip bands-twin boundaries and slip bands-grain boundaries interactions is treated based on the Tanaka-Mura model and the Eshelby inclusion theory. The proposed damage model is able to reproduce the damage evolution processes and predict the crack initiation life within the twice error band.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Mechanics
Qianhua Kan, Yong Zhang, Yangguang Xu, Guozheng Kang, Chao Yu
Summary: The functional degeneration of super-elastic NiTi shape memory alloy (SMA) rods was investigated under cyclic tension-unloading and compression-unloading experiments. The results showed that the functional degeneration exhibited a strong tension-compression asymmetry, which was caused by the initial mixed textures, polarity of martensite transformation, and the interaction between martensite transformation and dislocation slipping. Furthermore, the dependence of functional degeneration on the applied stress level was discussed.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Weiyang Huang, Guozheng Kang, Pengyu Ma
Summary: The electro-mechanically coupled cyclic deformation of VHB 4905 dielectric elastomer is studied through experimental observation and constitutive modeling. It is found that applying a constant voltage leads to more apparent cyclic softening and ratchetting in VHB 4905 DE, indicating an electro-mechanically coupled effect. The deformation also exhibits rate-dependence and stress-level-dependence. A visco-hyperelastic constitutive model considering nonlinear viscosity and the effect of applied voltage is proposed and validated through comparison with experimental data.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Engineering, Mechanical
Yuehao Du, Jiangcheng Cai, Qianhua Kan, Qinghua Zhang, Ping Wang, Hongchen Miao, Guozheng Kang
Summary: In this study, a time-delayed layer-based piezoelectric transducer (TDLBPT) is developed for unidirectional generation and reception of pure SH0 wave. The TDLBPT can achieve a phase gradient over a wide range of frequencies, eliminating the need for additional time delays. Both simulated and experimental results demonstrate that the TDLBPT can generate pure SH0 wave and focus the wave energy along a given direction in a plate. Due to its excellent performance and easy fabrication, the proposed TDLBPT is highly useful for unidirectional excitation and reception of SH0 wave in SHM and NDT.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Yu Lei, Chao Yu, Ziyi Wang, Xiang Xu, Hang Li, Guozheng Kang
Summary: A multi-mechanism macroscopic phenomenological constitutive model is established to characterize the uniaxial ratchetting of extruded AZ31 magnesium alloy at room temperature. The model considers the strong basal texture and different deformation mechanisms, including dislocation slipping, twinning, and detwinning. Different yield functions and hardening rules are used to capture these different deformation mechanisms, and the interaction among them is considered in the model. The model shows good agreement with experimental results, validating its reasonability and capability.
MECHANICS OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yong Zhang, Chao Yu, Di Song, Yilin Zhu, Qianhua Kan, Guozheng Kang
Summary: This study experimentally investigates the elastocaloric effect of NiTi shape memory alloy helical springs with different geometric parameters and applied loads. It is found that the elastocaloric performance can be tailored by adjusting the spring's geometric parameters and the applied load. A three-dimensional thermodynamic-consistent constitutive model is developed, and simplified analytical relations are derived to predict the cooling temperature and elastocaloric strength of the springs. The experimental data and predictions from both the finite element analysis and analytical relations are in good agreement, demonstrating the potential of developing cooling technology with high elastocaloric strength and low driving force.
MECHANICS OF MATERIALS
(2023)
Article
Engineering, Manufacturing
Yanbei Hou, Ming Gao, Jiayao Chen, Wei Shian Tey, Mei Chen, Han Zheng, Boyuan Li, Lihua Zhao, Kun Zhou
Summary: A simple and cost-effective surface modification method for Fe3O4-coated aramid fibres is proposed to fabricate polyamide 12 composites by the multi jet fusion technology. The addition of Fe3O4@AF hybrids significantly improved the tensile strength, Young's modulus, and flame retardancy of the composites.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Article
Materials Science, Multidisciplinary
Shuxin Chang, Zhiwu Zhu, Guozheng Kang, Xingmin Huang, Juan Zhang
Summary: A phase field model combined with finite element method was used to simulate the ratchetting phenomenon of medium-manganese steel under asymmetric load and discuss the effect of martensitic transformation on ratchetting. The results showed that the ratchetting strain of the steel increased with increasing stress amplitude, mean stress, and stress ratio, and the martensite content increased with increasing stress amplitude but decreased with increasing mean stress and stress ratio. The plastic strain induced by martensitic transformation played a critical role in the overall ratchetting behavior.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Engineering, Mechanical
Wen-Ping Wu, Zi-Jun Ding, Yun-Li Li, Chao Yu, Guozheng Kang
Summary: The thermomechanical fatigue (TMF) properties of Ni-based single crystal superalloys are studied using molecular dynamics simulations. Two different cyclic deformation mechanisms are identified. Under Out-of-phase TMF loading, the samples exhibit a higher cyclic stress range, plastic strain energy density, and shorter fatigue life compared to In-phase TMF loading. The low-temperature tension half-cycle is found to result in earlier failure due to dislocation and stacking fault penetration into the precipitate phase, attracting more attention in actual operation.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Acoustics
Huijian Chen, Zhiqiang Feng, Ling Tao, Jian Li, Hongchen Miao, Guozheng Kang
Summary: Nonlinear ultrasonic techniques are effective in characterizing incipient defects of materials. In this study, a time domain spectral finite element method combined with the bi-potential contact theory is used to simulate contact acoustic nonlinearity (CAN) problems with prestresses. It is found that a primary shear horizontal (SH) wave can generate a second harmonic SH wave when there are tangential prestresses at the frictional interfaces or crack surfaces. This new phenomenon is explained by the asymmetric sliding mechanism induced by the tangential prestresses.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Chemistry, Multidisciplinary
Jiayao Chen, Ran An, Wei Shian Tey, Qingyun Zeng, Lihua Zhao, Kun Zhou
Summary: This study proposes a new method for the homogeneous dispersion of carbon nanotubes (CNTs) in elastomer composites printed via multi jet fusion using dual-functional toughness agents (TAs). The TAs not only serve as an infrared absorbing colorant for selective powder fusion but also act as strengthening and toughening fillers. By optimizing the printing parameters and agent formulation, the mechanical performance of the printed parts is maximized, resulting in significant improvements in strength and toughness in all printing orientations and alleviation of mechanical anisotropy. This in situ filler addition method using tailorable TAs has the potential to fabricate parts with site-specific mechanical properties and assist in the scalable manufacturing of 3D-printed elastomers.
