Article
Engineering, Multidisciplinary
Xiawan Hua, Ryo Higuchi, Tomohiro Yokozeki
Summary: The mechanical behavior of tapered laminates without belt plies with different taper ratios and ply thickness under the loading-unloading tensile test was studied. The damage behavior of the specimens was observed through microscope imaging after the unloading process. The results show that tapered laminates utilizing thin-ply composites have excellent mechanical properties and damage-resistant capability, allowing for a wider range of taper ratios in the design of tapered composite structures and enabling lightweight.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Mechanics
A. Pupurs, M. Loukil, J. Varna
Summary: The study experimentally investigated the bending stiffness of carbon/epoxy and glass/epoxy cross-ply laminates with intralaminar cracks and local delaminations. The analysis showed that the bending stiffness decreased with increasing density of transverse cracks and delamination length.
MECHANICS OF COMPOSITE MATERIALS
(2021)
Article
Chemistry, Physical
Bharat Bhushan Mishra, Ajay Kumar, Jacek Zaburko, Barbara Sadowska-Buraczewska, Danuta Barnat-Hunek
Summary: This study investigates the free vibration response of angle ply laminates with uncertainties using various computational models, finding that soft computation models are efficient in reducing the number of trials and improving computational efficiency.
Article
Polymer Science
Donglin Gao, Zuguo Bao, Weijian Han, Xianpeng Wang, Shiyao Huang, Li Huang, Qiuren Chen, Hailong Zhao, Yahong Xu
Summary: In practical applications, the mechanical properties of carbon fiber-reinforced polymer (CFRP) under complex dynamic loadings are important for design and product development. This study investigated the static and dynamic tensile properties of CFRP with different stacking sequences and ply orientations. The results showed that the tensile strengths were sensitive to strain rate, while Young's modulus was not affected. The strain rate effect varied with stacking sequences and ply orientations, with cross-ply and quasi-isotropic-ply laminates exhibiting lower strain rate effects compared to unidirectional-ply laminates. The failure modes of CFRP laminates were influenced by the strain rate, indicating a mismatch between the fiber and matrix.
Article
Mechanics
Jaroslaw Gawryluk, Andrzej Teter
Summary: This study investigates the behavior of real short thin-walled laminated angle columns subjected to uniform shortening through numerical analysis and experiments. The obtained numerical and experimental results show very good agreement.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Costas D. Kalfountzos, George S. E. Bikakis, Efstathios E. Theotokoglou
Summary: This article investigates the postbuckling and secondary buckling response of simply supported and clamped rectangular fiber-metal laminates (FMLs) and glass-fiber reinforced composite plates subjected to uniaxial compression. A novel FEM procedure is proposed to locate the secondary buckling point, and the correlation between the secondary buckling load and the plate aspect ratio is established.
ENGINEERING STRUCTURES
(2022)
Article
Materials Science, Composites
A. Solis, E. Barbero, S. Sanchez-Saez
Summary: The study analyzed the influence of fibre-orientation on the progression of delamination using the Serial/Parallel Mixing Theory and a continuum damage model, and validated the model with experimental results. An increase in fibre angle resulted in loss of stiffness and strength, while the difference in delamination progression along the width of the beam highlighted the need for a three-dimensional representation.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Yanfeng Wang, Qi Wu
Summary: In this study, three different ply orientations of microscopic models were simulated using the finite element method. The results showed that ply orientation does not significantly affect temperature distribution, but it has a significant impact on the von Mises stress in the fiber closest to the interface between two stacked laminae. The von Mises stress within a unit cell displays a recurring pattern, and it decreases as the ply orientation angle increases. The study provides valuable insights into the mechanics of residual stresses at the microscopic level and identifies potential defect areas influenced by these stresses.
Article
Materials Science, Multidisciplinary
Antonio Greco
Summary: This study investigates the stiffness evolution of clustered composites and nanocomposites using FEM analysis. Proper modeling for fully dispersed composites and nanocomposites involves accounting for nanoparticle aspect ratio, volume fraction, and angle of orientation. Additionally, the FEM model proposed in this work considers the number and volume fraction of nanoparticles in the cluster. The calculated longitudinal modulus and other elastic constants of clustered composites using the proposed approach show significant differences compared to fully dispersed composites.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
Yi-Rong Luo, Robert Hewson, Matthew Santer
Summary: This article describes a design approach that takes into account manufacturing constraints for spatially optimised fibre-reinforced composites. The approach optimises local fibre orientation, fibre volume fraction and density-based topology to determine the optimal design. A continuity equation is used to constrain the fibre orientation and ensure continuous fibres within realistic volume fractions. Fibre paths are reconstructed using two scalar fields to ensure manufacturability, allowing for generation of printer toolpaths. The results demonstrate that this approach successfully guarantees manufacturability with minimal performance loss.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2023)
Article
Engineering, Civil
Karol Szklarek, Maria Kotelko, Miroslaw Ferdynus
Summary: This paper presents a parametric study on the crashworthiness performance of prismatic steel thin-walled frusta. The study investigates the influence of geometric parameters and foam filling on energy absorption and crashworthiness performance using Finite Element simulations. The results provide insights into the most effective configurations of frusta and suggest further research on crashworthiness indicators and optimization.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Environmental
Jiazhi Yang, Xuejun Long, Xiaonan Feng, Jun Wan
Summary: A novel composite material, kaolin/lanthanum carbonate (KLC), was studied for the simultaneous sorption of orthophosphate and phosphonate. It was found that orthophosphate and phosphonate competed for sorption on the surface of KLC. The maximum sorption capacities of both phosphorus species were achieved at pH 4.9, and the impact of ionic strength on sorption capacity was negligible. An artificial neural network (ANN) model was developed and successfully predicted the removal efficiency of orthophosphate and phosphonate.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Mechanics
Guillaume Broggi, Joel Cugnoni, Veronique Michaud
Summary: Three different J-integral formulations, which improve the existing approaches by using stereo-digital image correlation, are implemented and discussed to derive the experimental translaminar toughness of composites. A field fitting procedure and a crack tip extraction procedure are proposed to address noise-related issues and report the energy release rate as a function of the crack increment. A parametric study conducted on synthetic and experimental data reveals the suitability of the proposed J-integral methods for translaminar toughness evaluation.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Chemistry, Physical
Mohd Khairul Rabani Hashim, Mohd Shukry Abdul Majid, Mohd Ridzuan Mohd Jamir, Farizul Hafiz Kasim, Hassan A. Alshahrani, Mohd Azaman Md Deros, David Hui
Summary: This study investigated the impact response behaviors of PALF/carbon hybrid laminate composites for different ply orientations and stacking sequences. The results showed that the hybrid effect of PALF and carbon as reinforcements improved the overall impact properties of the laminates. The stacking sequence and ply orientation had an influence on the energy absorption capacity of the laminates.
Article
Mechanics
Haoqi Zhang, Shuai Wang, Ka Zhang, Jiang Wu, Aonan Li, Jie Liu, Dongmin Yang
Summary: This study presents a sequentially coupled optimisation method for 3D printing of continuous carbon fibre reinforced polymer composites, which includes both structural topology optimisation and fibre orientation optimisation. The study demonstrates the potential of manufacturing ultra-lightweight composite structures through 3D printing and the benefits of fibre orientation optimisation in lightweight design of composites with topology optimisation. Experimental results show that 3D printed composites with optimised fibre orientation achieved significantly higher strength and stiffness compared to Markforged (R) printed composites.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Lukasz Jedlinski, Jakub Gajewski
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2019)
Article
Engineering, Mechanical
Jakub Gajewski, David Valis
Summary: The study aims to assess how long engine operation time can be extended without oil change in discontinuous mode. Analysis of longitudinal oil sample data has enabled the study of long-term changes in particle and substance levels, supporting the validation of previous research. By combining reinforced decision trees with artificial neural networks, an effective tool has been developed for predicting the operation time of the technical system.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Chemistry, Physical
Jakub Gajewski, Przemyslaw Golewski, Tomasz Sadowski
Summary: This paper discusses the importance of adhesive bonding in civil and mechanical engineering, as well as the analysis of dual adhesive single-lap joints. The study presents the results of numerical modeling and the use of neural networks in analyzing the influence of different material parameters on the dual adhesive joint.
Article
Engineering, Multidisciplinary
Lukasz Jedlinski, Arkadiusz Syta, Jakub Gajewski, Jozef Jonak
Summary: This study conducted linear and nonlinear analyses on a commonly used cylindrical gear to detect the extent of tooth damage. Due to vibrations and disturbances in the test equipment, traditional vibration signal analysis methods failed to provide conclusive and satisfactory results. Therefore, nonlinear recurrence analysis was adopted to address the issue of determining the level of gear tooth damage.
Article
Environmental Sciences
Mariusz Jojczuk, Piotr Kaminski, Jakub Gajewski, Robert Karpinski, Przemyslaw Krakowski, Jozef Jonak, Adam Nogalski, Dariusz Gluchowski
Summary: The aim of this study was to evaluate the use of selected artificial intelligence methods for predicting the outcomes of head and neck injuries. The data of 6,824 consecutive cases of head and neck injuries treated in hospitals in the Lublin Province between 2006-2018 were retrospectively analyzed. The designed neural network achieved a predictive value of 80.7% for mortality, indicating its potential as a promising tool.
ANNALS OF AGRICULTURAL AND ENVIRONMENTAL MEDICINE
(2023)
Article
Engineering, Civil
Karol Szklarek, Maria Kotelko, Miroslaw Ferdynus
Summary: This paper presents a parametric study on the crashworthiness performance of prismatic steel thin-walled frusta. The study investigates the influence of geometric parameters and foam filling on energy absorption and crashworthiness performance using Finite Element simulations. The results provide insights into the most effective configurations of frusta and suggest further research on crashworthiness indicators and optimization.
THIN-WALLED STRUCTURES
(2022)
Article
Chemistry, Physical
Michal Rogala, Jakub Gajewski
Summary: This study focuses on thin-walled structures with axial force and their role as passive energy absorbers through progressive harmonic crushing. The energy absorbers made of AA-6063-T6 aluminum alloy were tested experimentally using an INSTRON 9350 HES bench, and numerically analyzed using Abaqus software. The number and diameter of drilled holes, located 30 mm away from the base, were the variable parameters. The results show that the hole diameter has a significant effect on the stroke efficiency indicator and mean crushing force.
Article
Geosciences, Multidisciplinary
Jozef Jonak, Ivan Kuric, Pawel Drozdziel, Jakub Gajewski, Milan Saga
ACTA MONTANISTICA SLOVACA
(2020)
Article
Chemistry, Physical
Michal Rogala, Jakub Gajewski, Miroslaw Ferdynus
Article
Engineering, Multidisciplinary
David Valis, Marie Forbelska, Zdenek Vintr, Jakub Gajewski
Proceedings Paper
Engineering, Industrial
D. Valis, J. Gajewski, K. Hasilova, M. Forbelska, J. Jonak
2019 IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL ENGINEERING AND ENGINEERING MANAGEMENT (IEEM)
(2019)
Proceedings Paper
Computer Science, Interdisciplinary Applications
Karol Szklarek, Jakub Gajewski, David Valis
III INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN ENGINEERING SCIENCE (CMES 18)
(2019)
Proceedings Paper
Computer Science, Interdisciplinary Applications
Patrycja Kepa, Jakub Gajewski
III INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN ENGINEERING SCIENCE (CMES 18)
(2019)