Article
Mechanics
Yi-Er Guo, De-Guang Shang, Lin-Xuan Zuo, Lin-Feng Qu, Di Cai, Tian Jin, Dao-Hang Li
Summary: This paper tested the mechanical properties of carbon fibre reinforced multidirectional laminates at different temperatures. A stress normalized method is proposed based on the microstructure and fibre layer thickness of the laminates. A life prediction model suitable for the fatigue process dominated by compression damage is proposed based on the normalized static ultimate strength and fatigue stress at high temperature. The fatigue test results at different temperatures show that the proposed model can successfully predict the fatigue life of multidirectional laminates, with a prediction error within three factors.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Ping Xing, Haiyan Yu
Summary: Experiments on tension-tension fatigue of rivet-bonding CFRP/CFRP joints were conducted, presenting the F-N curve and estimating fatigue life. Failure modes in static tension and fatigue tension were compared, with analysis of hysteresis phenomenon and discussion on stiffness degradation and residual slip. Results indicated that joints exhibited adhesive layer cracking, rivet bending, and fibers tearing-off as the main failure modes, with a potential infinite cycle life under 38.3% ultimate tensile strength. Three stages of failure evolution characterized by stiffness degradation and residual slip growth were observed, along with four main hysteresis types during cycle loading. Non-linear models of stiffness degradation and residual slip showed good agreement with experimental results.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Xiujie Zhu, Chao Xiong, Junhui Yin, Zhaoshu Yang, Haitao Sun, Huiyong Deng, Kaibo Cui, Youchun Zou
Summary: The stiffness, failure load and failure mechanism of carbon fibre reinforced plastic (CFRP) composite trapezoidal corrugated sandwich plates (CTCSPs) under four-point bending load were investigated. Experimental tests, modeling predictions, and parametric analysis were conducted. The results showed that by increasing theta, the limit load of the specimens first increased and then decreased while the stiffness decreased. The failure modes observed were shear corrugation fracture, debonding, and face fracture. The study also presented the variations in stiffness parameters and failure mechanism maps.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Dian-sen Li, Ming-guang Dang, Lei Jiang
Summary: This study investigated the impact of elevated temperature on tension fatigue behavior and failure mechanisms of carbon/epoxy 3D angle-interlock woven composites. The findings suggest that fatigue properties decrease at high temperatures, with the main failure mechanism being matrix microcrack propagation and fiber breakage.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
L. Heinzlmeier, S. Sieberer, C. Kralovec, M. Schagerl
Summary: This study aims to find an empirical model to describe and predict damage propagation caused by a circular hole in thin-walled composite plates through experimental trials. Results show that higher loads lead to larger damage, but the damage propagation ceases for the selected plate configuration, preventing complete failure.
EXPERIMENTAL MECHANICS
(2023)
Article
Materials Science, Multidisciplinary
Alok Gupta, Chris J. Bennett, Wei Sun, Nigel Neate
Summary: The microstructural features and their evolution during cyclic deformation have a direct impact on the low cycle fatigue life of additively manufactured LPBF Ti-6Al-4V. Tensile and strain controlled LCF tests were conducted to study the cyclic softening behavior and failure mechanism. The presence of fine a' needles in LPBF Ti-6Al-4V provides higher tensile strength and increases the ability to overcome obstacles to dislocation motion. The evolution of dislocation substructures and the formation of low angle boundaries during cyclic deformation contribute to fatigue fracture.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Jan Godzimirski, Marek Roskowicz, Michal Jasztal, Iga Barca
Summary: The purpose of this study was to analyze the impact of different mechanical fastener types on the static strength and failure mechanism of lap joints in composite elements, as well as the effect of supplementing these joints with adhesive joints under fatigue load. Computed tomography technology was used to observe damage in the composite joints. The study found that partial damage to the hybrid joint does not increase the load on the fasteners or impair the joint's fatigue life, and the two-stage destruction of the hybrid joint enhances the safety of aircraft structures.
Article
Mechanics
Yuyang Pang, Gang Wu, Haitao Wang, Danying Gao, Pu Zhang
Summary: The bond-slip model of CFRP-steel bonded interface is crucial for predicting the bond behavior of CFRP-strengthened steel structures. Few scholars have investigated CFRP delamination failure based on the interfacial bond-slip model. Experimental data verified the accuracy of the model considering adhesive thickness and inter-laminar shear properties of the CFRP plate.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Aerospace
Yangjie Zuo, Ting Yue, Ruisong Jiang, Zengqiang Cao, Liu Yang
Summary: This paper investigates the damages caused by bolt insertion in Carbon Fiber Reinforced Polymer (CFRP) interference fit bolted joints. The mechanical behaviors of the joints under static and cyclic loads were experimentally evaluated. The results show that the hole entrance in the upper laminate and the laminate boundary near the hole wall are the most critical regions for damages during bolt insertions. However, these damages have minimal influence on the static failure loads and fatigue failure modes of the joints. The interference fit can improve the fatigue resistance of the laminate hole, but the bolt seems to experience a more critical local fatigue loading condition.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Mechanics
Rui Guo, Guijun Xian, Chenggao Li, Bin Hong
Summary: In this study, a hybrid rod with carbon/glass fibers uniformly dispersed was developed for use as a bridge cable using the pultrusion technology. The tension-tension fatigue performances of the hybrid rod were investigated at different stress levels, and the fatigue failure mechanism was analyzed. The results showed that the hybrid rod exhibited improved fatigue life and stiffness retention through the fiber uniformly hybrid technology.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Chemistry, Physical
Li Lv, Mingli Yang, Yao Long, Jun Chen
Summary: This study used molecular dynamics simulations to investigate the effect of temperature and strain rate on the microstructure, mechanical behavior, and fracture damage mechanism of the TATB-F2314 interface. The results provide important insights for the design, preparation, and safe use of PBX materials.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
W. B. Li, J. C. Pang, H. Zhang, S. X. Li, Z. F. Zhang
Summary: The study conducted high-cycle fatigue tests on selective laser melted Inconel 718 superalloy at different temperatures, revealing a shift in fatigue damage mechanisms at elevated temperatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Construction & Building Technology
Anbang Li, Shanhua Xu, Youde Wang, Cheng Wu, Biao Nie
Summary: The experimental study demonstrated that externally patching CFRP plates significantly strengthened the fatigue behavior of corroded steel plates. Different strengthening configurations had diverse effects on fatigue life extension and crack growth retardation, with end anchorage measures delaying CFRP bonding interface failure and increasing CFRP strengthening stiffness or adopting prestressed CFRP plates reducing crack growth rate effectively.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Mechanics
Zlatan Kapidzic, Amanda Millinger Nylander
Summary: This study tests a hybrid wing box under cyclic and quasi-static bending/twisting loading at high temperatures, validating the accuracy of computed strains. The study finds a significant difference between thermally induced strains and mechanically induced strains, with thermal strains accounting for 10-20% of the mechanical strains. Additionally, fatigue failure of titanium bolts and fatigue cracks in bolt holes are detected, but no delamination growth is observed in artificial defects or impact damages. The final failure is initiated by a combination of bearing and bolt bending failure in the main CFRP-aluminum joint. This work emphasizes the importance of large-scale tests in inducing various damage and failure mechanisms as well as thermal effects in hybrid CFRP-aluminum structures.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Ju Kang, Qibing Wang, Zhichun Wang, Zhewen Han, Ruishan Xin, Xiangdong Jiao
Summary: The T92/HR3C dissimilar metal weld joints were fabricated using manual tungsten inert gas (TIG) welding with Inconel 82 as the filler metal. It was found that the location of fatigue fracture shifted from the weld metal to the heat-affected zone of the T92 steel with a decrease in stress amplitudes.
MATERIALS CHARACTERIZATION
(2022)
Article
Physics, Multidisciplinary
Chao Mu, Qiangwei Yin, Zhijun Tu, Chunsheng Gong, Ping Zheng, Hechang Lei, Zheng Li, Jianlin Luo
Summary: We conducted Sb-121 nuclear quadrupole resonance (NQR) measurements on the kagome superconductor CsV3Sb5 with T(c) of 2.5 K. The Sb-121 NQR spectra split after a charge density wave (CDW) transition at 94 K, indicating the presence of a commensurate CDW state. The coexistence of the high temperature phase and CDW phase between 91 K and 94 K suggests a first order phase transition. The CDW order exhibits a tri-hexagonal deformation with a lateral shift between adjacent kagome layers, consistent with a 2 x 2 x 2 superlattice modulation. The superconducting state coexists with CDW order and shows conventional s-wave behavior in the bulk state.
Article
Multidisciplinary Sciences
Zhen Zhu, Michal Papaj, Xiao-Ang Nie, Hao-Ke Xu, Yi-Sheng Gu, Xu Yang, Dandan Guan, Shiyong Wang, Yaoyi Li, Canhua Liu, Jianlin Luo, Zhu-An Xu, Hao Zheng, Liang Fu, Jin-Feng Jia
Summary: This study utilized the proximity effect of the superconductor niobium diselenide (NbSe2) on bismuth telluride (Bi2Te3) thin films to observe a gapless superconducting state with a segmented Fermi surface, proving the strong impact of finite Cooper pair momentum on the quasiparticle spectrum.
Article
Chemistry, Physical
Angela Nigro, Giuseppe Cuono, Pasquale Marra, Antonio Leo, Gaia Grimaldi, Ziyi Liu, Zhenyu Mi, Wei Wu, Guangtong Liu, Carmine Autieri, Jianlin Luo, Canio Noce
Summary: WP is a three-dimensional superconductor with an anisotropic electronic structure. Experimental data indicates a weakly anisotropic superconducting phase.
Article
Chemistry, Physical
Armando Galluzzi, Giuseppe Cuono, Alfonso Romano, Jianlin Luo, Carmine Autieri, Canio Noce, Massimiliano Polichetti
Summary: The magnetic response of a frustrated K2Cr3As3 sample with triangular arrays of twisted tubes has been studied. The sample exhibited diamagnetic behavior at temperatures above 60 K and ferrimagnetic behavior at lower temperatures. Spike-like magnetization jumps were observed around 800 Oe regardless of temperature and were compared with theoretical predictions on frustrated systems. The distribution of the magnetization jumps can be described by a Lorentzian curve, suggesting that they could be attributed to magnetic frustration arising from the twisted triangular tubes in the crystal lattice.
Article
Multidisciplinary Sciences
Yu Bai, Xuyuan Gao, Hui Wang, Lin Ye, Xianqun Zhang, Wei Huang, Xiuzhen Long, Kang Yang, Guoyong Li, Jianlin Luo, Jiyue Wang, Yonghao Yu
Summary: This study assembled and annotated the mitochondrial genome of eight Beauveria strains using DNA and RNA sequencing data. The presence of introns contributed to size variation in the mitochondrial genome, but the variation in intron numbers was not directly related to evolutionary relationships. RNA-seq reads can improve the accuracy of mitochondrial annotations.
Article
Engineering, Environmental
Jianfei Wu, Ziwei Cui, Yang Yu, He Han, Dan Tian, Jundie Hu, Jiafu Qu, Yahui Cai, Jianlin Luo, Jianzhang Li
Summary: In this study, a three-dimensional smart membrane with switchable superhydrophobic-hydrophilic surfaces was successfully prepared by grafting photo-responsive poly-spiropyran on wood-based substrates. This novel membrane can efficiently separate stabilized water-in-oil and oil-in-water emulsions through reversible hydrophilic-hydrophobic transition by switching UV and visible light irradiation. The prepared 3D smart membranes exhibited exceptional high flux, efficiency, cycle stability, and durability for the separation of surfactant-stabilized water-in-oil emulsions. This work opens a new avenue for the design of functional biomass-derived membranes for efficient and sustainable oily wastewater treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yibo Gao, Jianlin Luo, Shike Yuan, Jigang Zhang, Song Gao, Min Zhu, Zhiqing Li, Xiaoyang Zhou
Summary: Using high performance mortar for repair and protection of damaged structures is cost-effective and low-carbon emission. Graphene oxide (GO)/steel fiber (SF) reinforced ethylene vinyl acetate (EVA) polymer compound sulfoaluminate cement repair mortar (GOCRM) was directly prepared by water-reducer sonication dispersion and shear mix method. GOCRM showed good workability, mechanical properties, and durability, and the addition of sulfoaluminate cement, EVA, and GO improved the microstructure and bonding strength between GOCRM and the old substrate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Quantum Science & Technology
Zhenhai Yu, Xuejiao Chen, Wei Xia, Ningning Wang, Xiaodong Lv, Desheng Wu, Wei Wu, Ziyi Liu, Jinggeng Zhao, Mingtao Li, Shujia Li, Xin Li, Zhaohui Dong, Chunyin Zhou, Lili Zhang, Xia Wang, Na Yu, Zhiqiang Zou, Jianlin Luo, Jinguang Cheng, Lin Wang, Zhicheng Zhong, Yanfeng Guo
Summary: This study found that the pressure can drive the in-plane antiferromagnetic structure of EuCd2As2 across an intermediate in-plane ferromagnetic structure and then into an out-of-plane ferromagnetic structure. Butterfly-shaped magnetoresistance and anomalous Hall effect were observed under high pressure, which may support the pressure-driven ferromagnetic state. The magnetic phase transitions were not caused by structure transition or change in the Eu2+ valence state, but rather by the apparently reduced axial ratio (c/a) and compressed Eu-layer space distance. Calculations showed that the out-of-plane ferromagnetic structure only hosts one pair of Weyl nodes around the Fermi level, suggesting that pressure can be an alternative way to realize the ideal Weyl semimetal state in EuCd2As2 and explore exotic topological properties in such layered magnetic topological phase with strongly competing magnetic exchanges.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Review
Chemistry, Multidisciplinary
Xuejun Tao, Jianlin Luo, Jigang Zhang, Min Zhu, Liqing Zhang, Yibo Gao
Summary: Carbon nanotubes reinforced cementitious composite (CNRC) has excellent electrical and self-sensing properties, making it an intrinsic sensor for structural health monitoring (SHM). This article reviews the constitutive model, FEM modeling method, and simulation process of CNRC, and analyzes its mechanical, electrical, and electromechanical coupling properties under different parameters systematically by FEM method. The work explores the advantages and disadvantages of FEM for mechanical, electromechanical coupling, and SHM applications of CNRC modeling.
NANOTECHNOLOGY REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
C. Reinhoffer, P. Pilch, A. Reinold, P. Derendorf, S. Kovalev, J. -c. Deinert, I. Ilyakov, A. Ponomaryov, Min Chen, Tie-Quan Xu, Yue Wang, Zi-Zhao Gan, De-Sheng Wu, Jian-Lin Luo, S. Germanskiy, E. A. Mashkovich, P. H. M. van Loosdrecht, I. M. Eremin, Zhe Wang
Summary: In this study, high-order harmonic generation in the two-band superconductor MgB2 driven by intense terahertz electromagnetic pulses is reported. The nonequilibrium dynamics of the superconducting order parameter in MgB2 is probed via the nonlinear coupling to the terahertz field, which is reflected by the observed high-order harmonics in the superconducting phase. The temperature and field dependence of the nonlinear response allows for the establishment of the superconducting phase diagram.
Article
Materials Science, Multidisciplinary
Xuebo Zhou, Hongxiong Liu, Wei Wu, Kun Jiang, Youguo Shi, Zheng Li, Yu Sui, Jiangping Hu, Jianlin Luo
Summary: Anomalous Hall effect, anomalous Nernst effect, and anomalous thermal Hall effect were observed in CsV3Sb5. The longitudinal thermal conductivity deviates largely from its electronic contribution, while the thermal Hall conductivity is roughly consistent with the Wiedemann-Franz law. Large phonon contribution and other charge neutral contributions were identified in the thermal conductivity and Hall conductivity.
Article
Materials Science, Multidisciplinary
Yanmin Zhang, Luo Yan, Wei Wu, Ge He, Jingsong Zhang, Zhuang Ni, Xingyu Jiang, Mingyang Qin, Feng Jin, Jie Yuan, Beiyi Zhu, Qihong Chen, Liujiang Zhou, Yangmu Li, Jianlin Luo, Kui Jin
Summary: This study investigates the phonon modes and electron-phonon coupling in superconductor WP using angle-resolved polarized Raman spectroscopy. The results indicate that low-frequency phonon modes play a crucial role in superconductivity.
Article
Chemistry, Multidisciplinary
Xiaoyang Zhou, Jianlin Luo, Jigang Zhang, Xiaoping Wu, Xuejun Tao, Min Zhu
Summary: This research comprehensively investigates the resistance behaviors and piezoresistive sensing performances of carbon nanotube thin films (CNTFS) with different double-layers. The nine-double-layer CNTFS shows the best linearity, sensitivity, hysterics, and repeatability of 3.22%, 0.12684/mm, 2.16%, and 3.06%, respectively.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Yibo Gao, Jianlin Luo, Jigang Zhang, Xiaoyang Zhou, Fei Teng, Changquan Liu, Xijie Sun
Summary: Most cementitious repair materials have drawbacks such as low strength, insufficient bonding, and low anti-permeability. The use of Graphene Oxide (GO) and PA copolymer (GOPARMs) as modifiers in cement mortars can improve bonding and anti-permeability, although compressive strength and component integrity may be decreased.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Materials Science, Multidisciplinary
Feng Xiao, Wen Lei, Wei Wang, Carmine Autieri, Xiaojun Zheng, Xing Ming, Jianlin Luo
Summary: This paper reports a theoretical prediction of the pressure-induced evolutions of crystal structure and electronic structure of PdSSe, an isomorphous intermediate material of the orthorhombic PdS2 and PdSe2. The study reveals a series of pressure-induced structural phase transitions from the layered orthorhombic structure into an intermediate phase and then to a cubic phase. The structural phase transitions are accompanied by electronic structure variations from semiconductor to semimetal.
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)
