Article
Chemistry, Physical
Xin Wang, Beidi Chen, Fan Zhang, Lisheng Liu, Shuang Xu, Hai Mei, Xin Lai, Lin Ren
Summary: The introduction of laser shock peening (LSP) is effective in improving the mechanical properties of ceramics. Numerical simulations provide a convenient and efficient approach to examine the effects of different processing techniques on residual stress distribution. This study establishes a B4C-TiB2 ceramic model based on the extended Drucker-Prager model to investigate the effects of laser power density, the number of impacts, and laser spot overlapping rate on residual stress distribution and verifies the reliability of the simulation method through experimental data. The results indicate that increasing laser power density and the number of impacts can enhance surface residual compressive stress and reduce its depth; multiple impacts significantly reduce the depth of the residual compressive stress layer; a higher laser spot overlapping rate leads to a gradually increased and more uniformly distributed compressive residual stress in the processed area; a spot overlapping rate of 50% achieves the best processing effect.
Article
Engineering, Mechanical
Valerio Acanfora, Mauro Zarrelli, Aniello Riccio
Summary: This paper presents a numerical/experimental study on a new effective shock absorber concept achieved through Additive Manufacturing technology. The study compares different shock absorber configurations and demonstrates that sandwich structures made with polypropylene and carbon fiber reinforced polymers exhibit better overall crashworthiness performance. The numerical results are prelimary validated through experimental tests.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Chemistry, Physical
Guangjian Bi, Jianping Yin, Zhijun Wang, Zijian Jia
Summary: The study focused on the dynamic response and mechanical properties of a composite double-layer honeycomb sandwich structure under high-speed impact. The proposed fracture energy calculation method effectively described the structural variation trend, with sensitivity to cell density and material, while the strength of the top core significantly influenced overall energy absorption. The initially designed composite honeycomb sandwich structure showed improved energy absorption compared to traditional honeycomb protection structures.
Article
Mechanics
Neoklis Traiforos, Mikhail Matveev, Dimitrios Chronopoulos, Thomas Turner
Summary: The effect of stacking sequence, specimen thickness, tooling material and curing cycle on process induced distortions of L-shape composite structures was investigated through experimental and numerical analysis. A thermo-chemo-mechanical simulation approach using a modified Cure Hardening Instantaneously Linear Elastic (CHILE) and a linear viscoelastic material model was developed. Different boundary conditions were considered and the results showed that the tool material significantly affects the distortion of the parts. Balanced, symmetric and thick laminates contribute to reducing part distortion.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Shengxiang Liao, Shilin Jin, Tao Pang, Shisheng Lin, Yuanhui Zheng, Ronghua Chen, Guoyu Xi, Xiaoyan Li, Bin Zhuang, Feng Huang, Daqin Chen
Summary: This study presents a novel optofunctional composite material that achieves a balance between spectrum properties and heat dissipation, leading to high-quality white light and color restoration for laser-driven projection displays.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Materials Science, Ceramics
Feng Tian, Akio Ikesue, Jiang Li
Summary: Solid-state lasers are widely used due to their compact structure, convenience, and high power output. The design of appropriate composite gain media is crucial for their further development. Laser ceramics with excellent structural designability have shown rapid progress in the research of their composite structures.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Composites
Yidong Zhang, Xinyang Sun, Feng Liao, Yijun Qiao, Guannan Lei, Huihu Lu
Summary: This study presents an effective test method, the picture frame test, for evaluating the shear performance of honeycomb sandwich panels after repair. Mechanical performance tests were conducted and digital image correlation techniques were used to measure surface strain. The results showed that the repair method used in this investigation effectively restored the mechanical properties of the sandwich panels. Finite element models were established and a comparative analysis was conducted between experimental and simulation results. The study confirms the feasibility of the picture frame test method for evaluating the shear performance of honeycomb sandwich panels.
POLYMER COMPOSITES
(2023)
Article
Engineering, Civil
Hariharan Elangovan, Vasudevan Rajamohan
Summary: The dynamic performance of tapered composite sandwich plates with various configurations of a honeycomb core material are investigated through numerical and experimental studies. The addition of strip reinforcements in the honeycomb patterns is found to enhance the stiffness and damping characteristics of the structures. Furthermore, parameters such as the taper angle of face sheets and aspect ratio of sandwich plates also influence the free vibration characteristics.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Mechanical
Hangyu Lv, Shanshan Shi, Bingzhi Chen, Jiaxin Ma, Zhi Sun
Summary: Grid structures have been added innovatively to honeycomb structures to form grid-honeycomb hybrid cores with great potential for engineering application. The impact response of composite sandwich structures with grid-honeycomb hybrid cores was investigated using experimental and numerical simulation. The results showed that the intersection had the highest impact resistance, with higher peak load, damage threshold load, and initial stiffness, and lower maximum displacement and residual displacement compared to the rib and center. Additionally, the grid thickness had a significant effect on impact resistance.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Manufacturing
Yanneck Wielhorski, Arturo Mendoza, Marcello Rubino, Stephane Roux
Summary: The literature on numerical modeling of 3D woven composite reinforcements has seen a wide range of studies in the last two decades, with two distinct strategies emerging: predictive approaches involving mechanical constructions and numerical simulations, and descriptive approaches focusing on extracting real textile geometry. Different strategies have been employed for yarn behavior modeling at different scales, with a proposed common terminology for organizing and discussing strategies.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Thermodynamics
Guihua Fang, Pengbo Sun, Maosen Zhao, Wentao Zhang
Summary: This study prepared a series of paraffin-based ternary composite phase-change materials by combining paraffin with expanded graphite and nano-copper. The results showed that the addition of nano-copper significantly improved the thermal conductivity, heat storage and release rate of the composite materials. After 200 cycles, the phase-change temperature and storage capacity of the composite materials remained stable. Therefore, these composite phase-change materials are suitable for passive solar heating.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Manufacturing
Wuyil Ming, Chen Cao, Fan Shen, Zhen Zhang, Kun Liu, Jinguang Du, Haojie Jia
Summary: This paper investigates the influence of electrical parameters and material composition on the machining performances of wire electrical discharge machining for BN-AlN-TiB2 composite ceramics. A fusion thermo-physical model is proposed to predict the machining performances, and experimental results validate the accuracy of the model. The study finds that machining performances are proportional to discharge energy, and optimal process parameters are recommended for better energy efficiency.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Ceramics
Xi Wang, Shicheng Zhou, Kaiyang Liu, Shan Deng, Yaqi Xiao, Xiuli Chen, Huanfu Zhou
Summary: Extensive research has been conducted on microwave dielectric materials for their application in 5G and 6G communication technologies. This study broadened the sintering temperature range of MT-C ceramics using a composite of CeO2 and Mg2TiO4 ceramics, and stabilized their microwave dielectric performance. The prepared MT-C ceramics exhibited low loss and uniform density, making them suitable for industrial applications in the field of communication.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Multidisciplinary
Liangchi Zhang, Zhonghuai Wu, Chuhan Wu, Qi Wu
Summary: This paper presents a comprehensive review on the machining modeling of both fiber-reinforced and particulate-reinforced composites. The discussion focused on the importance of mechanics in understanding machining-induced deformation of composites. The review assessed recent advances in modeling methods and highlighted open problems and perspectives.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Zexing Fu, Zhibo Xu, Chong Liu, Nannan Song, Yebin Xu
Summary: (1-x)Ba0.5Sr0.5TiO3-xLi(2)MgTiO(4) and (1-x)Ba0.5Sr0.5TiO3-xLi(2)Mg(3)TiO(6) composite ceramics were prepared and their microstructures and dielectric properties were investigated. Both the Li2MgTiO4 phase and Li2Mg3TiO6 phase can coexist with the cubic perovskite BST phase. The dielectric constants of the composite ceramics decrease with increasing Li2MgTiO4 or Li2Mg3TiO6 content, while the dielectric loss remains low and the tunability decreases.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
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)
