Article
Instruments & Instrumentation
Francesco Nicassio, Francesca Lionetto, Gennaro Scarselli, Alfonso Maffezzoli
Summary: This study focuses on the shape relaxation mechanism of carbon fiber-epoxy thin laminates, finding that the transverse elastic modulus and hygroscopic effect are the main factors influencing the shape relaxation of bistable laminates.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Mechanics
Xiaodong Liu, Zhidong Guan, Xiaodong Wang, Ting Jiang, Kunhao Geng, Zengshan Li
Summary: A simplified constitutive model of resin in curing process considering stress relaxation was proposed in this paper, which improves computational efficiency while maintaining accuracy, addressing a practical need. The model was used to predict spring-in deformations of composite laminates with different structural parameters, showing good agreement with experiments. Additionally, a new interpretation of residual stress and spring-in deformation mechanisms was presented based on strain and stress changes, highlighting the importance of considering stress relaxation in modeling.
COMPOSITE STRUCTURES
(2021)
Article
Automation & Control Systems
Morteza Abouhamzeh, Niall Smyth, Jos Sinke
Summary: This paper presents the primary measurements of residual stresses in fibre-reinforced laminates, including the mechanisms governing the development of residual stresses and the measurement techniques applicable to composite and hybrid materials. The results provide a new understanding of the stress state in fibre metal laminates (FML), and comparisons with model predictions show the consistency of the results and the need for further improvements in model validations, especially in terms of residual stress values in the aluminium sheets.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Mechanics
Suong V. Hoa, Emad Fakhimi
Summary: This paper presents a special procedure for determining the final shape of un-symmetric laminates, which enhances the development of composite structures.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Aerospace
Mohammed M. A. Ammar, Bijan Shirinzadeh, Pan Zhao, Yaoyao Shi
Summary: The present study investigates the effect of automated fiber placement process on the induced residual stresses in polymer-matrix composites. The incremental hole-drilling method is applied to estimate the maximum stresses induced in the laminates. An optimization process is conducted based on the response surface method to minimize the generated stresses, while maintaining the highest production rate. The results show considerable effect on the stresses when changing the manufacturing process parameters due to the existence of in-situ curing and the change in material porosity. The optimization strategy could significantly decrease the stresses with maximizing the fabrication speed.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Pietro Galizia, Diletta Sciti
Summary: The impact of residual thermal stresses (RTS) on the reusability of CMCs with high-temperature capabilities and ablation resistance was studied. The RTS of ZrB2-SiC ceramic reinforced with carbon fibers was found to depend on fiber anisotropy and fiber coating. Microstructural analysis revealed the presence of residual porosity, cracks, porosity within fiber bundles, volumetric content of the fibers, and degree of dispersion. The level of RTS was determined by comparing stiffness-displacement curves and cyclic dilatometric curves, and its correlation with thermomechanical behavior was evaluated through flexural tests.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Mechanics
E. Polyzos, D. Van Hemelrijck, L. Pyl
Summary: This paper investigates geometries with asymmetric generic stacking under the influence of hygrothermal effects, deriving explicit formulas for parameters associated with delamination tests that show good agreement with Finite Element analyses.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Materials Science, Coatings & Films
Zhicheng Zhang, Zhanqiang Liu, Jinfu Zhao, Bing Wang, Yukui Cai
Summary: Metal particles used in cold spraying undergo severe plastic deformation, leading to the generation of residual stresses. Porous metal particles and ceramic particles further complicate the deformation process. Numerical models have been proposed to describe the formation of residual stresses in cBN-reinforced Ni matrix composites fabricated by cold spray deposition. The presence of cBN particles aggravates the transformation of residual stresses during the fabrication process. Understanding these phenomena is important for tailoring residual stresses and improving the performance of cold-sprayed cBN-reinforced Ni matrix composites.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Polymer Science
Huaguan Li, Hao Wang, Junxian Xiang, Zhaoxuan Li, Xi Chen, Jie Tao
Summary: This study investigated the evolution behaviors of curing residual stresses in GLARE under a hot-pressing condition and explained the mechanism of residual stress reduction. Results showed that the FE prediction models of the entire cure process were more precise than the traditional elastic model, and the stress evolution mainly occurred in the cooling stage. The curing shrinkage stress in the GFRP layer during the holding stage also significantly influenced the final stress level.
Article
Materials Science, Characterization & Testing
Piao Li, Weixing Yao, Fang Chen, Junda Zong
Summary: The study investigates the fatigue damage evolution of FRP laminates under complex random loads and findings show that the residual stiffness degradation curves can achieve satisfactory consistency through correlation analysis. Additionally, the residual stiffness degradation law of FRP laminates under random block spectrum is the same as that under constant amplitude spectrum.
Article
Materials Science, Ceramics
Magdalena Szutkowska, Jolanta Cyboron, Marcin Podsiadlo, Tomasz Polczyk
Summary: This study investigates the residual stresses of titanium carbonitride and alumina phases at different temperatures using advanced spark plasma sintering technique and XRD method. The results show that the sintering temperature has an influence on the residual stresses.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Manufacturing
Qi Wang, Xufeng Yang, Haixin Zhao, Xiaowen Zhang, Guanglong Cao, Mingfa Ren
Summary: A multiobjective optimization methodology was developed to balance low cost and high quality of 3D woven composites (3DWC). A multiscale process simulation model was proposed to calculate microscopic residual stresses in 3DWC, validated by experimental measurement. A surrogate model was constructed to reduce computational amount, and the optimization utilizing genetic algorithm achieved a Pareto front, with considerations for overall cure cycle in the process optimization.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Polymer Science
Raphael Olabanji Ogunleye, Sona Rusnakova
Summary: This review examines various methods for reducing tensile stresses in polymer matrix composites. The sources of residual stresses and their impacts are identified, and different techniques for limiting residual stresses are discussed. The review focuses on the advantages and limitations of elastically and viscoelastically prestressed composites, and highlights their influence in improving the mechanical properties of the materials. The findings from this study provide a basis for selecting suitable prestressing techniques and measuring residual stresses in composite materials.
Article
Materials Science, Coatings & Films
Wolfgang Tillmann, Diego Grisales, Dominic Stangier, Carl-Arne Thomann, Joerg Debus, Alexander Nienhaus, Daniel Apel
Summary: This study deposited ternary nitrides with carbon atoms into tool steel using different techniques, and found that the introduction of carbon significantly reduced residual stresses. The compressive residual stresses in multilayer coatings increased with the addition of TiAlN interlayers, and the wear coefficients of HiPIMS coatings were notably lower than DCMS coatings.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Composites
Hao Wang, Huaguan Li, Yingmei Xu, Yanyan Lin, Hongli Li, Jie Tao
Summary: This study investigated the curing thermal residual stresses characteristics of GLARE and their effects on mechanical behaviors. Residual stresses significantly reduced the yield strength of GLARE and slightly influenced the tensile strength, initial damage loads, and interlaminar shear strength. Edge failure mode caused by edge effect during the propagation of the delamination cracks was observed, which was verified by finite element models and SEM images.
APPLIED COMPOSITE MATERIALS
(2021)
Article
Mechanics
N. H. Nash, T. M. Young, W. F. Stanley
COMPOSITE STRUCTURES
(2016)
Article
Mechanics
N. H. Nash, T. M. Young, W. F. Stanley
COMPOSITE STRUCTURES
(2016)
Article
Engineering, Manufacturing
N. H. Nash, T. M. Young, W. F. Stanley
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2016)
Article
Thermodynamics
M. S. O'Regan, P. C. Griffin, T. M. Young
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
(2016)
Review
Engineering, Aerospace
J. M. O'Brien, T. M. Young, D. C. O'Mahoney, P. C. Griffin
PROGRESS IN AEROSPACE SCIENCES
(2017)
Article
Engineering, Civil
J. M. O'Brien, T. M. Young, J. M. Early, P. C. Griffin
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2018)
Article
Engineering, Chemical
K. B. Katnam, A. J. Comer, D. Roy, L. F. M. da Silva, T. M. Young
JOURNAL OF ADHESION
(2015)
Article
Engineering, Mechanical
A. O'Carroll, M. Hardiman, E. F. Tobin, T. M. Young
Article
Engineering, Aerospace
Vincenzo Oliveri, Giovanni Zucco, Daniel Peeters, Gearoid Clancy, Robert Telford, Mohammad Rouhi, Ciaran McHale, Ronan M. O'Higgins, Trevor M. Young, Paul M. Weaver
Article
Engineering, Multidisciplinary
R. Telford, A. O'Carroll, R. S. Pierce, T. M. Young
COMPOSITES PART B-ENGINEERING
(2019)
Article
Engineering, Aerospace
G. Zucco, V Oliveri, M. Rouhi, R. Telford, G. Clancy, C. McHale, R. O'Higgins, T. M. Young, P. M. Weaver, D. Peeters
AERONAUTICAL JOURNAL
(2020)
Article
Energy & Fuels
Ioannis Katsivalis, Angeliki Chanteli, William Finnegan, Trevor M. Young
Summary: This study assessed the performance of LEP materials used for protecting wind turbine blades. The mechanical properties and durability of the materials were evaluated through experimental methods, and the damage and failure mechanisms during rain erosion were investigated using CT scanning.
Proceedings Paper
Materials Science, Multidisciplinary
E. Cortes, F. Sanchez, L. Domenech, A. Olivares, T. M. Young, A. O'Carroll, F. Chinesta
PROCEEDINGS OF THE 20TH INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING (ESAFORM 2017)
(2017)
Article
Chemistry, Physical
Enrique Cortes, Fernando Sanchez, Anthony O'Carroll, Borja Madramany, Mark Hardiman, Trevor M. Young
Article
Materials Science, Multidisciplinary
E. F. Tobin, T. M. Young
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2017)
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)
