Article
Materials Science, Multidisciplinary
Kathiresan Muthiah, Manisekar Kondal, Vasudevan Rajamohan, Mehmet A. Guler
Summary: The study investigated the changes in energy-absorption and deformation characteristics of thin-walled E-glass fiber reinforced composite conical frusta upon introduction of cutouts through quasi-static axial compression loading. Different semi-apical angled conical frusta with various shapes of cutouts were compressed to analyze the crush-force-efficiency, energy-absorption, and specific-energy-absorption characteristics. Finite element software was used to simulate the crush behavior and compare it with experimental results, with findings reported in the article.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Mechanics
Faisal H. Bhuiyan, Ray S. Fertig
Summary: The study developed a physics-based multiscale fatigue damage analysis methodology and applied it to fatigue damage prediction in composite materials, enabling damage analysis and prediction of laminates in different directions under tensile loading.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Composites
Zhe Yang, Kunkun Fu, Zhongsen Zhang, Junming Zhang, Yan Li
Summary: This study presents an orthogonal-element solid orthotropic material with penalization (SOMP) topology optimization method that incorporates the 3D printing manufacturability of continuous carbon fiber reinforced composites (CCFRCs) and a printing path planning strategy. The results demonstrate the effectiveness of this method in optimizing structural design and improving material stiffness.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Mingshen Li, Xuhai Xiong, Shude Ji, Wei Hu, Yumei Yue
Summary: The TT-FSLW technique, with low rotational speed, has successfully eliminated common FSLW defects and enhanced the maximum shear strength of the joint significantly, making it superior to other conventional welding methods in joining metals and PMCs.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Imad Hanhan, Michael D. Sangid
Summary: This study combines in-situ X-ray micro tomography experiments with finite element simulation to investigate the microstructural behavior and damage propagation in short fiber composites. It reveals the role of shear stress in interfacial cracking, hydrostatic stress in conoidal cracking, and environmental damage in longitudinal fiber breakage. Insights into stress states resulting in non-linear damage propagation in thermoplastic fiber composites are provided.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Mechanics
Lina Riano, Jean-Francois Chailan, Yoann Joliff
Summary: This study simulated the effects of humid tropical aging on a unidirectional composite by considering an interphase region, using micromechanical approach. Numerical micro-models were developed to predict the mechanical behavior of the composite, with results showing the importance of considering composite interphase in numerical models for mechanical behavior.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Manufacturing
Jeremy Brockmann, Marco Salviato
Summary: This paper explores the global Mode I fracture energy of a carbon fiber composite subject to a biaxial stress state at the crack tip, specifically in which one stress component is compressive and parallel to the crack. It is found that there is a monotonic decrease in the Mode I fracture energy as the crack parallel compressive stress increases. This weakening effect is attributed to splitting cracks that are induced at the crack tip due to the crack parallel compression. The importance of using a crack band model coupled with a fully tensorial damage law to accurately predict fracture in composites is emphasized in this study.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Engineering, Manufacturing
Sarah A. Elnekhaily, Ramesh Talreja
Summary: This study uses computational simulation to investigate the early stage of crack formation in unidirectional composites under transverse tension with micro voids in the matrix. The focus is on brittle cavitation leading to fiber/matrix debonding, followed by debond crack growth and kink-out into the matrix. The study considers nonuniform fiber distribution and a uniform hexagonal fiber pattern in the cross section of the composite with voids near the initiated cracks. The results show that debond growth and kink-out are affected by circular voids in close proximity, especially when their diameter is a significant fraction of the fiber diameter.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
Qi-Kun Feng, Jia-Yao Pei, Yong-Xin Zhang, Dong-Li Zhang, Di-Fan Liu, Jiang-Bo Ping, Zhi-Min Dang
Summary: Dielectric polymers with high energy density have attracted widespread attention in modern electronics and power systems. Improving the energy density of dielectric materials requires thermal treatment to modify the surface roughness of films and reduce local electric field distortion and charge injection. The thermal treated NBR/P(VDF-HFP) films exhibit higher breakdown strength and dielectric permittivity.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Composites
Pritam Kulkarni, Kiran D. Mali, Sandeep Singh
Summary: This study examined the performance of unidirectional and quasi-isotropic carbon fiber reinforced polymer composite laminate with uniform and non-uniform out-of-plane waviness defects. Experimental tests and numerical simulations were conducted to investigate failure loads and damage mechanisms for different waviness cases. The findings showed a good agreement between experimental observations and finite element simulation results.
POLYMER COMPOSITES
(2022)
Article
Engineering, Manufacturing
M. Kathiresan
Summary: This study focused on the axial and oblique low-velocity impact response of thin-walled aluminium conical frusta with circular cutouts at different locations. The results showed that the crush performance of 35 degrees semi-apical angled perfect conical frustum is better than 15 degrees and 25 degrees semi-apical angled specimens, and the specific energy absorption capacity of 25 degrees semi-apical angled conical frusta with a cutout at 0.75 H (c) is better than that with a cutout at 0.5 H (c).
INTERNATIONAL JOURNAL OF CRASHWORTHINESS
(2022)
Article
Engineering, Multidisciplinary
Huaipu Kang, Yi Li, Jintao Liang, Daniel Thomson, Hao Cui, Yulong Li
Summary: This paper investigates the dynamic failure behavior of short carbon fiber reinforced polyether-ether-ketone (SCFR-PEEK) composites under biaxial stresses. The failure initiates inside the gauge section under all loading conditions, and the numerical strain fields are in good agreement with the experimental ones. The testing method developed here is also applicable for dynamic biaxial testing of other composites.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Mechanics
Wei Tan, Emilio Martinez-Paneda
Summary: This study investigates the role of microstructural bridging on the fracture toughness of composite materials. A new computational framework is proposed to simulate various fracture processes and validate its accuracy. The results show that microstructural bridging can significantly enhance the fracture toughness, particularly the 3D fibre bridging effect. These findings shed light on microscopic bridging mechanisms and provide important guidance for developing high fracture toughness composites.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Wenmu Yang, Wenkai Chang, Jin Zhang, Guan Heng Yeoh, Cyrille Boyer, Chun H. Wang
Summary: This study presents a novel method of functionalizing ammonium polyphosphate (APP) to simultaneously improve structural strength and flame retardancy. Experimental results demonstrate that this method maintains the polymer's structural strength while meeting the flame-retardant requirements for railway vehicle applications. The study provides new design possibilities for industries such as construction and transportation.
COMPOSITE STRUCTURES
(2024)
Article
Engineering, Manufacturing
Francesco Ciampa, Raj Ladani, Geoffrey Knott, Thibaut Buns, Andrew D. Foreman, Charlotte Meeks, Alan Steele, Tim Cooper, Andrew Phillips, Adrian P. Mouritz
Summary: The use of tufted shape memory alloy (SMA) filaments in fibre reinforced polymer composites enhances delamination resistance and crack closure properties, creating a new class of damage tolerant composite material. By forming a large-scale bridging process zone along delamination cracks, the SMA tufts can partially close cracks after crack growth, leading to improved fracture toughness.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Mechanics
M. Kathiresan, K. Manisekar, V. Manikandan
COMPOSITE STRUCTURES
(2012)
Article
Mechanics
M. Kathiresan, K. Manisekar, V. Manikandan
COMPOSITE STRUCTURES
(2014)
Article
Engineering, Civil
M. Kathiresan
THIN-WALLED STRUCTURES
(2020)
Article
Engineering, Manufacturing
M. Kathiresan
Summary: This study focused on the axial and oblique low-velocity impact response of thin-walled aluminium conical frusta with circular cutouts at different locations. The results showed that the crush performance of 35 degrees semi-apical angled perfect conical frustum is better than 15 degrees and 25 degrees semi-apical angled specimens, and the specific energy absorption capacity of 25 degrees semi-apical angled conical frusta with a cutout at 0.75 H (c) is better than that with a cutout at 0.5 H (c).
INTERNATIONAL JOURNAL OF CRASHWORTHINESS
(2022)
Article
Materials Science, Multidisciplinary
Kathiresan Muthiah, Manisekar Kondal, Vasudevan Rajamohan, Mehmet A. Guler
Summary: The study investigated the changes in energy-absorption and deformation characteristics of thin-walled E-glass fiber reinforced composite conical frusta upon introduction of cutouts through quasi-static axial compression loading. Different semi-apical angled conical frusta with various shapes of cutouts were compressed to analyze the crush-force-efficiency, energy-absorption, and specific-energy-absorption characteristics. Finite element software was used to simulate the crush behavior and compare it with experimental results, with findings reported in the article.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Mechanics
M. Kathiresan, K. Manisekar
COMPOSITE STRUCTURES
(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)