Article
Engineering, Multidisciplinary
Hannah Erika D. Macaspac, Eduardo R. Magdaluyo
Summary: The study evaluated the buckling propensity of prosthetic pylon tube materials through 3D simulation, finding that the critical buckling load increased with diameter and thickness. A carbon fiber-pineapple fiber reinforced composite material showed potential as an alternative with higher critical load values.
ENGINEERING RESEARCH EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Gabriele Cortis, Ilaria Mileti, Filippo Nalli, Eduardo Palermo, Luca Cortese
Summary: Total hip arthroplasty is a common surgical procedure to restore hip joint mobility, but it may lead to stress-shielding phenomenon. This study introduces an innovative prosthesis design utilizing Additive Manufacturing techniques and assesses structural integrity with a ductile damage numerical approach. Different prosthesis geometries were compared through Finite Element simulations, leading to the selection of a promising design to mitigate stress shielding while ensuring structural safety under various loading conditions.
MECHANICS OF MATERIALS
(2022)
Article
Computer Science, Interdisciplinary Applications
Han Zhou, Jihong Zhu, Chuang Wang, Yifei Zhang, Jiaqi Wang, Weihong Zhang
Summary: Introduces a concurrent optimization framework based on multiscale finite element method, for optimizing hierarchical structures with parameterized lattice. This framework eliminates the assumption of scale separation and achieves a balance between performance and computational cost through offline and online stages.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Chemistry, Physical
Vasja Plesec, Jani Humar, Polona Dobnik-Dubrovski, Gregor Harih
Summary: This study investigated the possibility of using inexpensive bio-based and bio-degradable PLA material in combination with Fused Deposition Modeling 3D-printing technology for prosthesis socket development. Numerical simulations and material tests were conducted to analyze the safety and stability of the 3D-printed PLA socket. The results showed that the 3D-printed PLA socket can withstand stress and deformation and provide the same stability for amputees under different gait conditions.
Article
Chemistry, Physical
Rashwan Alkentar, File Mate, Tamas Mankovits
Summary: The development of medical implants is a key focus in the biomedical field. This study investigated the effects of different lattice structures on implants and aimed to find the best unit cell design similar to human bone. Comparisons were made between laboratory tests and numerical simulations, which showed some deviation between the two.
Review
Computer Science, Interdisciplinary Applications
Jintao Wang, Jihong Zhu, Tao Liu, Yulei Wang, Han Zhou, Wei-Hong Zhang
Summary: This work develops a topological optimization framework for parametric lattice structure design with the use of the scale-dependent multiscale finite element method (MsFEM). By introducing two different design variables, the control parameters, as material consumption and configuration of the lattice cell, are optimized simultaneously. The accuracy and efficiency of the analysis are improved by using MsFEM with periodic boundary conditions for structures with strong periodicity and MsFEM with six nodes on each edge of the coarse element for structures with weak periodicity.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2023)
Article
Engineering, Civil
Ming Li, Hualin Fan
Summary: The paper investigates the free vibration behaviors of novel hierarchical Isogrid stiffened cylinders (HISCs) through experiments and simulations. A nondestructive vibration correlation technique (VCT) is proposed to evaluate composite properties of HISC affected by manufacturing process, redefining fiber volume fraction. The hierarchical structure's effect on fundamental frequency is studied, along with advantages over Isogrid stiffened cylinder (ISC) for optimal design reference.
THIN-WALLED STRUCTURES
(2021)
Article
Mechanics
Yanda Wang, Luchao Geng, Yanping Lian, Mengchuan Xu, Daining Fang
Summary: In this article, a new node assembly dual-material lattice design method is proposed to achieve three-dimensional experimental verification with tailorable coefficient of thermal expansion (CTE). Three different geometric layouts with experimentally demonstrated CTEs are presented based on the proposed design method and theoretical model. The achieved CTE of 0.05 ppm/degrees C represents a significant innovation and application potential.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Lipeng Sun, Yongjian Liu, Haitao Wang, Fengrong Shi, Jiang Liu, Lei Jiang
Summary: This study investigated the critical parameters affecting the elastic tensile stiffness of Perfobond rib connectors (PBLs) used in cable-stayed bridges. Experimental and finite element analysis were conducted to propose accurate equations for predicting the tensile stiffness of PBLs. The results showed that the tensile stiffness of PBLs increased with rib thickness, hole diameter, and concrete strength, but decreased with embedded depth. The width of the rib had no influence, and the transverse rebar diameter slightly increased the tensile stiffness. The proposed equations based on the spring model accurately predicted the tensile stiffness of PBLs.
ENGINEERING STRUCTURES
(2023)
Article
Chemistry, Physical
Zatul Faqihah Mohd Salaha, Muhammad Imam Ammarullah, Nik Nur Ain Azrin Abdullah, Aishah Umairah Abd Aziz, Hong-Seng Gan, Abdul Halim Abdullah, Mohammed Rafiq Abdul Kadir, Muhammad Hanif Ramlee
Summary: Total hip arthroplasty (THA) is one of the most successful surgical procedures in medicine. However, research has shown that the solid hip implant used in the procedure can cause cortical bone resorption. This study aimed to design a porous hip implant to improve osteointegration and revascularisation.
Article
Chemistry, Multidisciplinary
Thierry Decker, Slawomir Kedziora
Summary: This paper presents a new method for optimizing the thickness distribution of a functionally graded lattice structure. It reduces the number of optimization variables and is applicable to highly nonlinear models and arbitrary optimization goals. The method is capable of altering the local thickness of a lattice structure while optimizing its specific energy absorption at constant weight, and it shows significant improvement potential for certain lattice structures.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Multidisciplinary
Narendra S. Nanal, Scott T. Miller, Jesse D. Thomas, Lucy T. Zhang
Summary: This study presents a computational framework for simulating shell structures interacting with fluids using the immersed approach. The approach captures the complex movement and motion of thin structures and allows non-intrusive coupling of independent fluid and shell finite element solvers. The method projects the shell structure to create a volumetric structure, enabling accurate and realistic loading and geometry.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Polymer Science
Shu-Yu Jhou, Ching-Chi Hsu, Jui-Chia Yeh
Summary: This paper introduces a dynamic drop weight impact simulation for predicting the impact response of 3D printed polymeric sandwich structures. The study shows that the shape, number, and material stiffness of the lattice cores have a significant effect on their shock absorption characteristics, providing an effective simulation method for various industries.
Article
Engineering, Aerospace
Xavier M. Delgado, Craig G. Merrett
Summary: An isogrid is a lattice structure that is strong and lightweight, making it ideal for spacecraft. However, recent finite element analyses have shown that isogrids do not exhibit isotropic behavior. Truss and finite element analyses, as well as experimental tests, have been conducted on various isogrid specimens to determine their isotropy and the effect of geometric parameters. Unequal load distributions have been observed, indicating that isogrids are not isotropic.
Article
Materials Science, Multidisciplinary
Dejun Jia, Fanchun Li, Cong Zhang, Kang Liu, Yuan Zhang
Summary: A lightweight lattice plate was designed using topological optimization and finite element modeling, which can reduce the weight of the plate by about 40%. The stiffness of the plate can be significantly reduced by reducing the thickness in a small range. The application of lattice plate can improve the average stress of the skeleton by about 4% and reduce the stress shielding effect of the skeleton.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Computer Science, Interdisciplinary Applications
Fabricio Alves de Almeida, Ana Carolina Oliveira Santos, Anderson Paulo de Paiva, Guilherme Ferreira Gomes, Jose Henrique de Freitas Gomes
Summary: This study proposes a multivariate Taguchi loss function approach for modeling and optimizing manufacturing processes, with a focus on quality and process costs. The method utilizes design of experiments techniques, principal components analysis, and normal boundary intersection method. Applied to the flux-cored arc welding of stainless-steel cladding process, the method provides an optimal solution and reduces computational effort by 90%.
ENGINEERING WITH COMPUTERS
(2022)
Article
Materials Science, Composites
Lorena Cristina Miranda Barbosa, Gabriel Roberto Vieira Duque, Antonio Carlos Ancelotti Junior
Summary: This paper investigates the mechanical properties of a composite material reinforced by jute fibers and based on a thermoplastic matrix, and explores its sustainable application in the structural industry. The experimental results demonstrate that this composite material can be a cost-effective alternative for manufacturing more sustainable composites.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2022)
Article
Computer Science, Interdisciplinary Applications
Guilherme Antonio Oliver, Joao Luiz Junho Pereira, Matheus Brendon Francisco, Antonio Carlos Ancelotti Jr, Guilherme Ferreira Gomes
Summary: Composite structures are prone to sudden failures, with delamination being a common mode of failure due to fiber-matrix interface rupture. Structural Health Monitoring techniques, particularly damage indexes based on wavelet transform techniques, can effectively identify and locate delaminations. The proposed damage index in this study utilizes a weighted sum of discrete wavelet transform detail coefficients to improve accuracy, with the use of mixture design analysis and multiobjective optimization showing promising results.
ENGINEERING WITH COMPUTERS
(2022)
Article
Computer Science, Artificial Intelligence
Evandro Gabriel Magacho, Ariosto Bretanha Jorge, Guilherme Ferreira Gomes
Summary: Truss-type structures are widely used in engineering, but direct inspection techniques face difficulties in locating and identifying structural damage due to their large-scale nature. Therefore, structural health monitoring techniques based on optimization algorithms offer a promising and non-destructive solution. In this study, an inverse damage identification problem for large-scale lattice-type structures is solved using the SunFlower Optimization algorithm, which considers multiple damage sites and two objective functions. The inclusion of mode shapes in a multi-objective formulation improves the accuracy of damage identification. The multi-objective SFO algorithm outperforms NSGAII.
EVOLUTIONARY INTELLIGENCE
(2023)
Article
Materials Science, Multidisciplinary
Guilherme Antonio Oliver, Joao Luiz Junho Pereira, Matheus Brendon Francisco, Guilherme Ferreira Gomes
Summary: This study conducted a statistical analysis on the effects of damage characteristics on a specific damage metric obtained from the discrete wavelet transform. The results provide a basis for developing more optimized and sophisticated methods for damage identification in structural health monitoring. The numerical methodology was validated through experimental tests, and the analysis results showed the sensitivity of parameters and their interaction.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Review
Materials Science, Multidisciplinary
Matheus Brendon Francisco, Joao Luiz Junho Pereira, Guilherme Antonio Oliver, Lucas Ramon Roque da Silva, Sebastiao Simoes Cunha, Guilherme Ferreira Gomes
Summary: This manuscript reviews over 150 papers on energy absorption of auxetic structures, highlighting the importance of additive manufacturing and numerical analysis in samples manufacturing. It also discusses various cell models related to auxetic structures, providing additional guidelines for engineers and designers.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
Daouda Kane, Guilherme Gomes, Vanessa Macanhan, Antonio Ancelotti Jr
Summary: This study investigates the effect of ply drop-off on the tensile strength of tapered laminate composite structures. The results show that the position and angle orientation of the ply drop-off can influence the tensile strength. Design guidelines for the angle orientation and position of dropped plies are proposed.
ENGINEERING COMPUTATIONS
(2022)
Article
Thermodynamics
T. A. Z. de Souza, J. L. J. Pereira, M. B. Francisco, C. A. R. Sotomonte, B. Jun Ma, G. F. Gomes, C. J. R. Coronado
Summary: This study provides a detailed analysis of hydrogen production using Response Surface Methodology and Lichtenberg Algorithm, aiming to quickly optimize steam reforming cycles considering different feedstock compositions and other characteristics. Comparison with other optimization studies demonstrates that this new methodology offers a quick and consistent method for optimizing steam reforming and potentially other thermodynamic cycles.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2023)
Article
Materials Science, Composites
Daniel Brighenti Bortoluzzi, Camila Aparecida Diniz, Ronny Francis Ribeiro Jr, Matheus Brendon Francisco, Antonio Carlos Ancelotti Jr, Guilherme Ferreira Gomes
Summary: A great deal of research has shown that z-pins can significantly enhance the mechanical properties of carbon fiber composite laminates. This study investigates the modal responses of z-pinned composites using rectangular z-pin sizes and area density insertion design variables. The experimental results indicate an increase in the natural frequency and a reduction in vibration amplitude when compared to unpinned specimens. Furthermore, the study highlights the use of analysis of variance (ANOVA) and artificial neural networks (ANN) for analyzing and predicting the modal responses of z-pinned composites.
APPLIED COMPOSITE MATERIALS
(2023)
Article
Computer Science, Artificial Intelligence
Joao Luiz Junho Pereira, Benedict Jun Ma, Matheus Brendon Francisco, Ronny Francis Ribeiro Jr, Guilherme Ferreira Gomes
Summary: Feature selection is a valuable tool in understanding problems in data mining, improving patterns and reducing computational costs. This study introduces a new metaheuristic called binary sunflower optimization (BSFO), which shows promising results in terms of fitness value and computational costs. The improved version, IBSFO, is compared with eight other metaheuristics and performs better in terms of fitness value and execution time.
Article
Computer Science, Artificial Intelligence
Joao Luiz Junho Pereira, Guilherme Ferreira Gomes
Summary: In order to tackle challenging engineering problems, the state-of-the-art in multi-objective optimization is shifting towards using meta-heuristics and a posteriori decision-making methods. The Multi-objective Sunflower Optimization (MOSFO) algorithm, inspired by the phototropic life cycle of sunflowers, was created and validated in this work. MOSFO demonstrated significant convergence and coverage capabilities and outperformed other popular and recent algorithms in most of the test functions, making it a promising method for problems with multiple objectives.
Article
Materials Science, Characterization & Testing
Lucas Antonio de Oliveira, Guilherme Ferreira Gomes, Joao Luiz Junho Pereira, Matheus Brendon Francisco, Anthonin Demarbaix, Sebastiao Simoes Cunha Jr
Summary: Infrared thermography technique is used to detect damage in metallic and non-metallic materials, and it helps in determining the safety of mechanical structures. Vibrothermography combines vibration and infrared thermography to identify internal damages through temperature mapping. The current study focuses on identifying different research approaches for damage identification and characterization, evaluating heat generation mechanisms in damaged regions, and utilizing mathematical methods to enhance the efficiency of damage detection and characterization.
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2023)
Article
Engineering, Mechanical
Ronny Francis Ribeiro Junior, Fabricio Alves de Almeida, Ariosto Bretanha Jorge, Joao Luiz Junho Pereira, Matheus Brendon Francisco, Guilherme Ferreira Gomes
Summary: Fault diagnosis is crucial for maintenance industries to prevent catastrophic failures and save time and money. This paper proposes a model using uniaxial acceleration signals to cluster, identify, and diagnose six different failures in electric motors. Experiment results demonstrate the efficiency of the proposed method, with an average accuracy of 97.9%, especially in identifying bearing, unbalanced, and mechanical loss failures. The method can be used for early detection of fault conditions based on real electric motor experiments.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Hyan Candido Guedes, Joao Luiz Junho Pereira, Guilherme Ferreira Gomes
Summary: This study aims to develop and parametrically optimize a high-performance composite material using interpolation strategy, thickness variations, and the number of layers. Four different multi-objective optimizers were evaluated to minimize total mass and evaluate the Tsai-Wu failure criterion under different loading conditions. The MOPSO algorithm demonstrated superior robustness and significantly improved the optimal solution compared to the initial model.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2023)
Article
Engineering, Civil
Rhuan Jose Ribeiro Pereira, Fabricio Alves de Almeida, Guilherme Ferreira Gomes
Summary: This study investigates the influence of printing parameters on the mechanical properties of 3D printed parts and performs a multi-objective optimization on the experimental results. The Design of Experiments methodology is used to evaluate five essential parameters: layer thickness, printing speed, infill density, filling pattern, and printing material. Mechanical tests are conducted to obtain experimental curves, and the ANOVA method is applied to obtain a behavior equation and Pareto graphs. The multi-objective optimization improves mechanical properties, reduces printing time by 72.39%, and increases mass by 9.06%.
