Article
Materials Science, Characterization & Testing
Wei Zhou, Reng Qin, Kang-ning Han, Zhi-yuan Wei, Lian-Hua Ma
Summary: Tensile failure and damage visualization of three-dimensional braided composites were investigated using progressive damage mechanics. Results show that progressive damage affects specimen's load carrying capacity, stability, and damage evolution. Longitudinal and transverse cracks are the main forms of specimen failure under different tensile stresses.
Article
Materials Science, Ceramics
Jia-Qi Song, Lian-Yi Wang, Jun-Tong Huang, Hui-Yong Yang, Peng Huang, Hao Luo, Jin-Sen Wang, Kai Zheng, Rui-Ying Luo
Summary: This study evaluated the mechanical properties of 2D woven SiCf/SiC composites fabricated via precursor infiltration and pyrolysis (PIP) through a three-point bending test. The failure processes of the composites under different loading directions were monitored using an acoustic emission (AE) system and digital image correlation (DIC) technique. The results showed that the damage process was dominated by compressive stress in composites loaded parallel to the layup direction, while tensile stress primarily affected composites loaded perpendicular to the layup direction. The complementary results obtained from the AE system and DIC technique demonstrate the effectiveness of multiple analytical methods in assessing the mechanical behavior of SiCf/SiC composites.
CERAMICS INTERNATIONAL
(2022)
Article
Mechanics
Monika Kushwaha, Gursahib Singh Bhatia, A. Arockiarajan
Summary: This study focuses on developing a three-dimensional energy-based gradual degradation model for patch-repaired laminates, considering the effects of shear non-linearity under tensile load. The model uses modified Hashin failure criteria for plain woven laminate and maximum shear stress criteria for the adhesive. The results show that the failure of the adhesive plays a significant role in the damage of laminates.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Mahoor Mehdikhani, Christian Breite, Yentl Swolfs, Jeroen Soete, Martine Wevers, Stepan V. Lomov, Larissa Gorbatikh
Summary: This study explores the potential of Digital Volume Correlation (DVC) in detecting and characterizing damage in fiber-reinforced composites using in-situ X-ray Computed Tomography. Through preliminary analysis of digital deformation images and real-deformation images acquired during in-situ tensile loading, DVC proves to be a promising tool for quantification of deformation and damage at both mesoscale and microscale levels. Damage mechanisms in fiber-reinforced composites are successfully detected and characterized using DVC, showing the limitations of traditional methods like grayscale thresholding.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Jie Sun, Ang Wang, Hongneng Cai, Xuecheng Han, Zhiyuan Wei, Yaping Huang
Summary: A novel multiscale progressive damage model is proposed in this paper to study the mechanical behavior and damage mechanism of plain woven composites. The model considers the macroscopic behavior of composites by using three-dimensional solid elements and incorporates mesoscale constitutive relationships for the yarn and matrix. By introducing the stress amplification factor (SAF) database based on the microscopic representative volume element (RVE), a progressive damage model is developed using the micro-mechanics of failure (MMF) theory. Validation experiments show that the model accurately predicts the behavior of the composites in quasi-static tension. The proposed multiscale method can be further applied to predict the strength and damage of full-size woven composites under complex loading conditions.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Mechanics
Ruijian Sun, Tao Zheng, Yudi Yao, Danyuan Li, Huiliu Si, Licheng Guo
Summary: A comprehensive experimental method combining microscope observation, multiscale digital image correlation (DIC), and in situ computed tomography (CT) is proposed in this study to investigate the complex damage evolution of 3D woven composites under short beam shear (SBS) loading. The surface damage process and the final damage mode of the specimen are observed using a microscope, and the causes of fiber kinking are explained. Multi-scale DIC is utilized to obtain global and local strain distributions on the specimen surface, providing explanations for the occurrences of weft yarn transverse cracks and interface debonding. Additionally, in situ CT experiment is carried out to identify the reasons for the nonlinear segments of the load-displacement curve and the decline of load bearing capacity of the specimen in the late stage of the experiment. The information obtained from different observation methods is complementary, aiding in the understanding of the complex damage mechanism of 3D woven composites.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Junhua Guo, Weidong Wen, Hongjian Zhang, Haitao Cui
Summary: A mesoscale fatigue progressive damage model is proposed for fatigue life prediction and failure behavior assessment of 3D woven composites, incorporating Hashin's fatigue criteria and maximum tensile/shear stress criteria. A fatigue damage evolution model based on Fang's static-load damage evolution model is developed, considering damage irreversibility and compressive crack closure effect. The results show that all predicted fatigue lives fall within a two-fold error band.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Mechanics
Xiao-long Ji, Wei Zhou, Heng Sun, Jia Liu, Lian-hua Ma
Summary: This study investigated the mechanical behaviors and failure mechanisms of different repair configurations in composite patch repair using acoustic emission and X-ray micro-computed tomography. The analyses of characteristic signals and three-dimensional visualization of interior damage deepened the understanding of damage evolution behaviors and failure characteristics. The damage visualization analyses of X-ray micro-computed tomography corresponded to the acoustic emission response of interior damage, successfully realizing the damage evolution in repaired composites and helping understand the evolvement rule of damage on the adhesive interface.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Characterization & Testing
Ning Pei, Junjun Shang, Leonard J. Bond, Chunguang Xu
Summary: This study discusses the progressive tensile damage of carbon fiber composites with and without multi-walled carbon nanotubes (MWCNTs). The analysis of AE signals and micro-computed tomography imaging shows that MWCNTs can delay and prevent matrix cracking and fiber debonding in the composite materials. The findings provide guidance for composite design and structural health monitoring when considering the use of MWCNTs.
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2022)
Article
Materials Science, Composites
Yadi Duan, Haipeng Qiu, Tiantian Yang, Ling Wang, XiaoMeng Wang, Weijie Xie, Kun Qian, Diantang Zhang
Summary: This study investigates the progressive damage behaviors of 2.5D woven SiCf/SiC composites using a combination of techniques, revealing that both the preform structures and testing directions have a significant impact on the mechanical properties and failure mechanisms of these composite materials.
COMPOSITES COMMUNICATIONS
(2021)
Article
Mechanics
Yuhang Liu, Li Zhang, Zhixing Li, Zhanguang Chen, Kai Huang, Licheng Guo
Summary: Acoustic emission (AE) signal analysis was used to investigate the damage mode identification, damage initiation detection, and damage evolution analysis of open-hole plain woven composites (OHPWCs) under tensile load. The effect of the open-hole diameter on mechanical properties and failure mechanisms was assessed. The peak frequency ranges of typical failure modes were identified, and a novel concept of damage participation rate (DPR) was proposed. The results showed that matrix cracking was the major proportion of damage modes in the damage evolution process of OHPWCs under tensile load.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Characterization & Testing
Ning Pei, Junjun Shang, Leonard J. Bond
Summary: The study found that adding multi-walled carbon nanotubes can improve the performance of carbon fiber composites, while different off-axis angles can enhance the toughness of the composites. The combination of acoustic emission signals and micro-computed tomography technology effectively characterized the damage evolution of the composites.
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2021)
Article
Mechanics
Minghua Wang, Mengyue He, Zhihong Liang, Di Wu, Yue Wang, Xinlin Qing, Yishou Wang
Summary: This paper investigates the fatigue behavior of CFRP open-hole laminated beams with different stacking sequences under pure tensile loading using acoustic emission (AE) and digital image correlation (DIC), and analyzes the influence of different damage mechanisms on the ultimate fatigue failure. The stiffness degradation behavior of CFRP structures is characterized by AE hit rate and absolute AE energy, and the strain field distribution characteristics during the damage failure are discussed in association with DIC. By combining PCA and the Kmeans++ algorithm, the damage modes of two types of layered CFRP laminated beams are identified and their contribution to the ultimate fatigue failure is analyzed using CDI values.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Carolyn Oddy, Magnus Ekh, Martin Fagerstrom
Summary: There is a growing demand for lightweight materials with improved performance and reduced manufacturing costs in various industries. This study proposes a macroscopic model to predict the material response of a 3D glass fiber reinforced epoxy material system, capturing experimentally observed inelastic strains and stiffness reductions. The model is general, thermodynamically consistent, and allows for modular addition and calibration of various non-linear phenomena depending on loading direction.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Materials Science, Ceramics
Xiang Yang, Chen Kun, Zheng Zhou, Zhang Wen, Peng Zhi-hang, Sun Chen-cheng, Wu Wen-jun, Cao Jian-hui
Summary: Continuous alumina fiber-reinforced alumina matrix composites were prepared and characterized. The damage mechanism of the composites was investigated using acoustic emission technology, revealing that cracks started and expanded in the matrix when the load increased. Delamination failure occurred during the short-beam shear test due to crack instability along the interlayer. Many fibers in the composites were crushed synchronously with the matrix as specimen deformation increased.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Textiles
Minghao Jia, Wanzi Xie, Kejing Yu, Kun Qian
Summary: In this study, a dense zirconia coating was coated on the surface of basalt fabrics to improve their alkali resistance. The coated basalt fabrics formed a protective membrane to prevent the diffusion of hydroxide ions, resulting in a final strength retention ratio of 89.92% compared to pristine basalt fabrics. The compressive strength and flexural strength of the zirconia-coated basalt fabrics reinforced concrete increased by 10.15% and 19.0% respectively.
JOURNAL OF THE TEXTILE INSTITUTE
(2022)
Article
Materials Science, Textiles
Minghao Jia, Kejing Yu, Kun Qian
Summary: This study investigated the uniaxial tensile properties of basalt fiber and basalt textile reinforced fine-grained concrete composites under different curing cycles using acoustic emission technology. The results showed a positive correlation between tensile strength and curing cycles, and an improved reinforcing effect with increased fiber volume content. The Aveton-Cooper-Kelly model was used to analyze the reinforcement mechanism of basalt textiles, which were found to significantly improve the cracking load, ultimate load, cracking displacement, and ultimate displacement of the concrete. The specimens exhibited strain hardening and the acoustic emission signals were highly correlated with the load-displacement curves, indicating different fracture mechanisms.
JOURNAL OF THE TEXTILE INSTITUTE
(2023)
Article
Chemistry, Physical
Tianyu Chen, Fan Zhou, Kun Qian, Kunlin Chen, Zhongwei Zhang, Xiaoqing Dai, Minqian Sun, Kejing Yu
Summary: This study reports the use of Ag+-doped alpha-MnO2 with a hierarchical structure for electromagnetic wave absorption, which significantly improves the absorption performance by modulating the microscopic morphology and crystal defects, achieving thin thickness, enhanced absorption intensity, and widened absorption bandwidth.
APPLIED SURFACE SCIENCE
(2023)
Article
Computer Science, Artificial Intelligence
Kun Qian, Peng Chen, Dong Zhao
Summary: To address the issue of ineffective object-background distinction in traditional RGB visual tracking algorithms, this study proposes a tracking algorithm based on spectral information, utilizing band selection, information fusion, and deep features. By conducting correlation analysis on 16 spectral bands and utilizing genetic optimization, two bands with low correlation coefficient and abundant information are obtained. Guided filtering is adopted to fuse the target region information from the two bands within the kernel correlation filtering tracking framework. Feature maps are generated using histogram of gradient and pretrained visual geometry group network. Finally, the target is detected based on the maximum value of a strong response. Experimental results demonstrate that the genetic optimization based multifeature tracker achieves good results in both subjective vision and objective evaluation.
IET IMAGE PROCESSING
(2023)
Article
Engineering, Chemical
Ping Wang, Lulu Li, Kun Qian, Kejing Yu, Yaoliang Zhang, Yunpeng Xia, Zhongwei Zhang, Ziming Xiong
Summary: This study synthesized nanoparticle-enhanced STF with various friction characteristics and investigated the enhancement mechanism of additives. The results indicated that the friction characteristics significantly influenced the ST performance.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Environmental Sciences
Zhe Zhang, Xuguang Zhu, Dong Zhao, Pattathal V. Arun, Huixin Zhou, Kun Qian, Jianling Hu
Summary: This paper proposes a novel algorithm for hyperspectral video target tracking that addresses the challenges of target scale variations. The approach combines deep features, spectral matching reduction, and adaptive-scale 3D hog features to track the target objects. Experimental results demonstrate that the proposed algorithm outperforms state-of-the-art approaches in tracking hyperspectral video targets.
Article
Environmental Sciences
Dong Zhao, Jialu Cao, Xuguang Zhu, Zhe Zhang, Pattathal V. Arun, Yecai Guo, Kun Qian, Like Zhang, Huixin Zhou, Jianling Hu
Summary: This paper proposes a novel hyperspectral target tracking algorithm based on DECF and ICF to address the performance degradation issue caused by background clutter. The algorithm achieves satisfactory tracking performance against background clutter challenges through feature fusion and context filtering.
Article
Polymer Science
Junhao Liu, Wanting Wei, Feng Cao, Zhiyong Zeng, Kun Qian, Hongmei Chen, Fenghua Zhang, Wenbing Li
Summary: Inspired by nature, scientists have developed surfaces with controllable wettability through alterations in surface micro/nanostructures or changes in chemical compositions. This article reports the control of surface wettability using three types of shape-memory micropatterns that can be reversibly transformed between a stretched and an original/recovered state due to the shape-memory properties of poly (ethylene-co-vinyl acetate) (EVA). The study also demonstrates that surface wettability can be controlled by the reversible transformation of surface micropatterns.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Fang Dong, Xiaoxu Wang, Chao Zhang, Kun Qian, Yiqiang Hong, Diantang Zhang
Summary: This paper presents the influence of reinforcement structure and matrix microstructure on the ablation mechanism and tensile progressive failure of carbon/phenolic 2.5D woven composites. The results show that the microstructure of the matrix has an important influence on the ablative properties of the specimens. CDP exhibits a better linear ablation rate, while CLP has a lower mass ablation rate. Furthermore, CLP retains higher post-ablation residual properties than CDP.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Environmental Sciences
Shiqing Wang, Kun Qian, Jianlu Shen, Hongyu Ma, Peng Chen
Summary: This paper proposes a SiamRPN based hyperspectral tracker to address the failure of tracking algorithm when the target undergoes deformation. A band selection method based on genetic optimization is designed to reduce information redundancy in hyperspectral images, with three bands selected based on joint entropy. Update network is trained on a dataset from general objective tracking benchmark to solve the problem of template decay in SiamRPN model. Experimental results show that the proposed tracker achieves good tracking results over the entire public dataset, outperforming other popular trackers in tracking deformed targets, with an overall success rate of 57.5% and a deformation challenge success rate of 70.8%.
Article
Environmental Sciences
Zhe Zhang, Bin Hu, Mengyuan Wang, Pattathal V. Arun, Dong Zhao, Xuguang Zhu, Jianling Hu, Huan Li, Huixin Zhou, Kun Qian
Summary: This paper proposes a novel hyperspectral video tracker based on the double Siamese network (D-Siam) and the AlexNet backbone. A spectral-deviation-based dimensionality reduction approach is adopted to improve the distinction between the target and background. The initial response map and adjacent response map obtained from the D-Siam network are fused using an adaptive weight estimation strategy. A confidence judgment module is proposed to regulate the update for the whole framework. Comparative analysis and extensive ablation study on a publicly available benchmark hyperspectral dataset show that the proposed tracker outperforms existing state-of-the-art approaches against most of the challenges.
Review
Biochemistry & Molecular Biology
Liping Jin, Chenpeng Ji, Shun Chen, Zhicong Song, Juntong Zhou, Kun Qian, Wenwen Guo
Summary: Bacterial infections and fire hazards pose potential risks in daily life. The demand for multifunctional textiles with flame retardant and antibacterial properties has increased, particularly in home furnishing and medical protection fields. Various treatment methods and novel technologies have been used to apply functional finishing agents onto fabrics. The use of natural biomasses and synthetic functional compounds with flame retardant and bacteriostatic properties has also gained attention. This review introduces commonly used finishing technologies and flame retardant/antibacterial agents, summarizing their advantages and disadvantages, which will contribute to future research and industry development.
Article
Engineering, Electrical & Electronic
Dong Zhao, Xuguang Zhu, Zhe Zhang, Pattathal Arun, Jialu Cao, Qing Wang, Huixin Zhou, Hao Jiang, Jianling Hu, Kun Qian
Summary: This paper proposes a novel hyperspectral video target tracking algorithm based on Pixel-wise Spectral Matching Reduction (PSMR) and Deep Spectral Cascading Texture (Deep-SCT) features. The algorithm overcomes the interference caused by illumination variation (IV) and achieves superior performance compared to state-of-the-art approaches. Experimental results demonstrate its effectiveness in handling IV.
Article
Chemistry, Analytical
Kun Qian, Shiqing Wang, Shoujin Zhang, Jianlu Shen
Summary: This article proposes a hyperspectral object tracking algorithm called SiamPKHT, which leverages pyramid shuffle attention and knowledge distillation to better utilize the features of hyperspectral images and address the difficulties in model training and overfitting problem. Experiments show that this algorithm outperforms other methods and meets real-time requirements.
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)
