Article
Mechanics
Sonia Braiek, Redouane Zitoune, Vijayan Krishnaraj, Ated BenKhalifa, Mohamed Faycal Ameur, Usama A. Khashaba, Mondher Zidi
Summary: This study experimentally investigates the effect of machining parameters and tool geometry on the drilling quality of filament wound hybrid composite tubes. The results show that the drilling of the filament wound layer generates a higher thrust force and has a higher surface roughness compared to the anti-corrosion layer. The delamination at the hole entry is predominant and increases with the increase in feed.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Xi Li, Yazhi Li, Fei Li, Zeng Huang, Hong Chen
Summary: This study focuses on the numerical analysis and experimental evaluation of failures and damages in the bolted joints of CFRP composite laminates under tensile loads. By establishing failure criteria and a mechanical model, the strength and damage of composite joints were accurately predicted. A new method was also proposed to improve the accuracy and efficiency of evaluating fracture angles.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Gregorio F. O. Ferreira, Jose Humberto S. Almeida, Marcelo L. Ribeiro, Antonio J. M. Ferreira, Volnei Tita
Summary: This study proposes a novel method to develop higher-order finite elements by considering progressive damage. The approach, based on Carrera's unified formulation, utilizes a damage model derived from continuum damage mechanics principles. The implemented User Element subroutine is capable of accurately and swiftly predicting progressive failure events and in-plane damage mechanisms for composite laminates under bending loadings, as observed in comparison to experimental results.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Aerospace
Minh Hoang Nguyen, Anthony M. Waas
Summary: This paper presents a finite element-based framework for modeling the probabilistic progressive failure of fiber-reinforced composite laminates with high fidelity and efficiency, including smart meshing strategy, novel mixed-mode law, and probabilistic modeling strategy.
Article
Mechanics
Johannes Reiner
Summary: This paper presents a generic strategy to generate macroscopic continuum damage models using non-local averaging, and calibrates the model with experimental data for specific carbon fiber-reinforced composites. The results show that non-local modeling enables more realistic simulation of damage, and suggest choosing a small enough averaging radius to avoid significant increase in computational cost.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Manufacturing
Zhibo Song, Shizhao Ming, Kaifan Du, Shaojun Feng, Caihua Zhou, Peng Hao, Shengli Xu, Bo Wang
Summary: Composite tubes are commonly used energy absorption devices, requiring multiple iteration calculations for crashworthiness design. The novel equivalent method, EMCA, significantly improves computational efficiency by predicting total energy based on limited calculations. Experimental results show that EMCA can improve computational efficiency by 62-86%.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Composites
Masoume Azizian, Mohammad Azizian, Babak Abazadeh, M. A. Mohtadi-Bonab
Summary: This paper employs a hybrid utilisation of the continuum damage mechanics approach and some novel techniques for progressive failure analysis of internally pressurised filament-wound composite tubes. The constructed numerical model in Abaqus software is validated with experimental failure evaluation and shows high accuracy and precision. Additionally, a novel strategy for optimisation of the stacking sequence of tubes under various stress ratios is proposed using the Taguchi approach, taking into account manufacturing winding angle restrictions.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Li Luo, Jingxuan Wang, Yundong Sha, Yanping Hao, Fengtong Zhao
Summary: This study thoroughly investigated the progressive damage process and failure modes of SiCf/TC4 composite shafts under single torsional loads. The damage process was found to be slow-varying under reverse torque loading, with fracture mostly occurring in the form of interface cracking; under forward loading, the damage process was fast-varying, with fracture mostly in the form of fibre fracture. Cross-scale models were proposed to verify the effectiveness of the progressive damage process.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
D. Campagna, A. Milazzo, I Benedetti, V Oliveri
Summary: This study presents a non-linear analysis method for considering damage initiation and evolution in variable angle tow composite plates under progressive loading. The model is based on first order shear deformation theory kinematics and non-linear strains in the von Karman sense. The constitutive relationships are formulated using continuum damage mechanics, allowing for in-plane damage initiation and evolution in each laminate layer. The Ritz polynomial expansion and minimization of the total potential energy provide the discrete solution equations, which are solved iteratively to capture damage evolution.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Rahul Singh Dhari, Nirav P. Patel, Hongxu Wang, Paul J. Hazell
Summary: Failure prediction modeling and optimization of composite structure under impact loading was conducted in the study, with fiber arrangement as a design variable and residual velocity as an objective function. The damage behavior of composites obtained through the model was validated with simulations and experiments, showing significant impact of fiber arrangement on residual velocity, penetration, energy absorption capacity, and ballistic limit of the plate.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Engineering, Mechanical
Felipe Ruivo Fuga, Mauricio Vicente Donadon
Summary: Efficient and reliable predictive modelling tools for damage tolerance analysis are crucial in the aerospace industry due to the potential of composite materials for design performance. Different approaches have been developed for interlaminar and intralaminar damage over the years. This study proposes a novel progressive damage model that addresses some shortcomings of current intralaminar Continuum Damage Mechanics (CDM) models, and compares the model predictions to experimental data through static and fatigue analysis.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Mechanics
Katarzyna Falkowicz
Summary: This study investigates the stability and failure analysis of thin-walled composite plate elements weakened by cut-out and subjected to axial compression. Experimental tests on real samples and numerical calculations using the finite element method were performed to investigate the failure behavior of carbon fiber reinforced polymer (CFRP) composite plates. The results showed a high agreement between the numerical analysis and experimental studies, confirming the effectiveness of the progressive failure analysis method.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Matej Gljuscic, Marina Franulovic, Borut Zuzek, Andrej Zerovnik
Summary: Despite its limitations in industrial applications, additive manufacturing excels in complex designs encountered in wearable technologies, prosthetics, implants, airfoils, and reverse engineering. However, research on multilayered additively manufactured composites is lacking in the literature. This study proposes a progressive damage model and validates it experimentally.
COMPOSITE STRUCTURES
(2022)
Article
Construction & Building Technology
Tagir Iskhakov, Jithender J. Timothy, Sven Plueckelmann, Rolf Breitenbuecher, Guenther Meschke
Summary: Tunnel linings installed in difficult geological conditions, such as Opalinus Clay and rocks containing anhydrite, can be protected from deterioration and failure by incorporating a compressible cementitious layer. The compaction potential of this layer can be improved by introducing soft inclusions or air bubbles in the cementitious mix. However, finding the optimal mix that provides both compaction potential and strength is important. Computational modeling can be used to design the compressible composite and predict its behavior based on material properties and volume fraction of the components. Experimental investigations are conducted to validate the model predictions.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Engineering, Civil
Chuanxiang Zheng, Zhenyu Wang, Liang Wang, Jinjie Lu, Jiao Lin, Yuchen Dai
Summary: The failure behavior of grid stiffeners under tension and flexural loadings is investigated through experimental and numerical studies. Three different typical layup schemes at the intersection were manufactured and tested. A 3D anisotropic damage model based on continuum damage mechanics is developed to model the progressive failure behaviors. The introduction of discontinuous plies at the intersection changes the failure mechanism and improves the mechanical performance of the grid structure, with the tensile and flexural strength improved by 21% and 23% respectively by properly introducing 25% of discontinuous plies. This work provides insights on the failure mechanisms of composite grid stiffeners, and the results can be used for optimization design of grid structures.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Roham Rafiee, Hadis Zehtabzadeh
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2020)
Article
Materials Science, Composites
Roham Rafiee, Sina Sotoudeh
Summary: This study introduces a novel approach for simulating delamination initiation under cyclic loading, based on hysteresis cohesive zone modeling and gradual degradation of interface properties. The numerical simulation results show good agreement with experimental data, validating the effectiveness of the proposed method.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2021)
Article
Materials Science, Composites
Roham Rafiee, Mostafa Sahraei
Summary: The study evaluated the influence of adding carbon nanotubes (CNTs) to laminated composites on delamination resistance through experimental and theoretical assessments. It was found that incorporating CNT as a novel technique can considerably improve the delamination toughness of laminated composites. The outputs of the modeling procedure showed good agreement with the conducted experimental study.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Roham Rafiee, Mohammad Reza Hashemi-Taheri
Summary: This article investigates the trailing edge failure of a commercial wind turbine blade, focusing on the impact of adhesive thickness and band width on the structural integrity of the blade. Through static analysis and sub-part modeling, the study examines the failure of adhesive joints under different conditions and extracts the proper dimensions of adhesive to withstand various conditions of the wind turbine blade.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Computer Science, Interdisciplinary Applications
Amin Ghorbanhossaini, Roham Rafiee, Andrei Pligovka, Marco Salerno
Summary: In this study, resin composites were fabricated using a standard matrix system for dental restorations, incorporating microsized fillers with nanopores. The mechanical properties of the composites were investigated through bending tests and modeling, and compared with commercial composites.
ENGINEERING WITH COMPUTERS
(2023)
Article
Computer Science, Interdisciplinary Applications
Reza Yazdanparast, Roham Rafiee
Summary: In this paper, three methodologies are proposed for determining the equivalent in-plane properties of square-shaped core honeycombs using the multi-scale homogenization technique. The proposed methods are compared with existing analytical and numerical methods to demonstrate their effectiveness.
ENGINEERING WITH COMPUTERS
(2023)
Article
Engineering, Multidisciplinary
Arman Khademi, Armin Yousefi, Mojtaba Haghighi-Yazdi, Majid Safarabadi, Roham Rafiee
Summary: This study aimed to model the long-term creep behavior of composite pipes considering moisture and impurities, and developed a high-level algorithm using Python script and finite element model to predict the long-term behavior of composite pipes. The results demonstrated that moisture reduces the lifetime of composite pipes, with a 2.6% percent error in estimating failure pressure compared to experimental data.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2021)
Article
Engineering, Civil
Harun Sepetcioglu, Necmettin Tarakcioglu, Roham Rafiee
Summary: In this study, the fatigue behavior of graphene nanoplatelets (GnPs) reinforced and non-reinforced basalt/epoxy composite pressure vessels (B-CPVs) under alternating internal pressure was experimentally investigated. The addition of a low content (0.25 wt%) of GnPs was found to improve the fatigue life of basalt/epoxy CPVs.
THIN-WALLED STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Roham Rafiee, Amirhesam Salehi
Summary: A novel recursive multi-scale modeling approach is developed to predict the burst pressure in filament wound composite pressure vessels. The modeling considers the micro, meso, and macro scales, and takes into account the imperfections in fiber arrangement. It starts from the micro scale, simulating fiber spacing and contiguity, and progresses to the meso scale to capture the influence of fiber-bundle undulation and crossovers. Finally, it analyzes the stress/strain distribution on each layer at the macro scale.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Roham Rafiee, Amirhesam Salehi
Summary: This study analyzes the influence of inescapable imperfections associated with fiber arrangement in the filament winding process on the burst pressure of a composite vessel through two-scale analysis and multi-scale modeling.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Composites
Roham Rafiee, Ali Ghamarzadeh
Summary: The main purpose of this research is to develop a model for investigating creep phenomenon in polymeric composites reinforced with randomly oriented short fibers. The creep phenomenon is first analyzed at the micro-scale in a representative volume element of a long-fiber composite using an implicit approach. Then, a macro-scale creep analysis is performed at the laminate level. The creep behavior of randomly oriented short fiber composites is obtained by integrating laminate analogy with creep modeling technique, and the results are compared with published experimental data.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Composites
Roham Rafiee, Amirhossein Rahimi
Summary: The main objective of this study is to investigate the mechanical degradation of fiber reinforced composites exposed to sunlight under natural conditions on a long-term basis. Experimental study and theoretical modeling are conducted to compare the results and evaluate the destructive influence of sunlight on the mechanical performance of polymeric composites through stochastic scenarios.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Materials Science, Composites
Roham Rafiee, Mohammad Naghi Arabian
Summary: This research focuses on investigating the influence of moisture absorption on the long-term creep behavior of GFRP pipes both experimentally and theoretically. The results show that moisture absorption has a significant impact on the creep behavior of GFRP pipes. Furthermore, a systematic modeling procedure is developed to evaluate the long-term wet-creep response of the GFRP pipes by linking the micro and macro scales.
POLYMER COMPOSITES
(2023)
Article
Engineering, Aerospace
Roham Rafiee, Touraj Farsadi, Majid Ahmadi Tehrani, Parsa Sharifi
Summary: The paper presents a systematic numerical design for optimizing composite wings under aerodynamic loading and evaluates their aeroelastic and structural performance. By utilizing the anisotropic features of composite materials, a method called aeroelastic tailoring is proposed. The methodology combines three different analysis tools: a commercial FE software, an in-house reduced order aeroelastic framework, and in-house linkage-learning genetic algorithms for optimization. The proposed methodology can be effectively applied to any arbitrary air vehicle's composite wing by changing input data.
INTERNATIONAL JOURNAL OF AERONAUTICAL AND SPACE SCIENCES
(2023)
Article
Multidisciplinary Sciences
Roham Rafiee, Amirali Eskandariyun, Claudio Larosa, Marco Salerno
Summary: In this study, a polymer composite containing microscale powder of nanoporous alumina filler was modeled and simulated using a computational multi-scale hierarchical approach. The presence of nanopores in the system was found to compensate for the absence of a bonding agent, suggesting a potential novel approach for composite materials in the future.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
