Article
Materials Science, Multidisciplinary
Julia Bach, Andre T. Zeuner, Thomas Wanski, Sarah C. L. Fischer, Patrick Herwig, Martina Zimmermann
Summary: This study investigates the influence of dross geometry on the fatigue behavior of AISI 304 during laser cutting. Different dross geometries were produced by varying laser cutting parameters, and four characteristic dross geometries were identified. Fatigue tests revealed that the fatigue behavior is dependent on the dross geometries due to their different notch effects. Moreover, the surface relief and dross properties of the cut edge depend on process parameters such as gas pressure and feed rate.
Article
Materials Science, Multidisciplinary
Muhamad Nur Rohman, Jeng-Rong Ho, Pi-Cheng Tung, Chin-Te Lin, Chih-Kuang Lin
Summary: In this study, the prediction and optimization of dross formation in laser cutting of electrical steel sheet in different environments were achieved using a deep neural network (DNN) and an improved grey wolf optimizer (I-GWO). The cutting environment, laser power, pulse frequency, and cutting speed were found to have a significant influence on dross formation, with less dross formation observed in the oil environment. The DNN model demonstrated high accuracy and effectiveness, outperforming other artificial intelligence methods in terms of statistical criteria.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Computer Science, Interdisciplinary Applications
Nebojsa Denic, Bogdan Cirkovic, Vesna Stevanovic, Malilsa Stevanovic, Dalibor Petkovic
Summary: This study optimized the plasma arc cutting process by considering dross formation. The combination of thickness and current was found to have the highest influence on dross formation rate and cutting weights. An adaptive neural fuzzy inference system was employed to classify input parameters and achieve optimization.
ADVANCES IN ENGINEERING SOFTWARE
(2022)
Article
Chemistry, Multidisciplinary
Kaori Nagai, Kazuki Shimizu
Summary: This study conducted concrete cutting experiments using a portable fibre laser, which showed similar cutting effectiveness to CO2 lasers. High-strength and low-strength concrete had almost identical cutting results, but the post-cutting situations varied. The research suggests laser concrete cutting as a solution for noise and dust related construction issues.
APPLIED SCIENCES-BASEL
(2021)
Article
Automation & Control Systems
Seyedeh Fatemeh Nabavi, Mohammad Hossein Farshidianfar, Anooshiravan Farshidianfar, Saeed Marandi
Summary: Dross formation in the laser beam cutting process was modeled in this study using analytical and empirical models. The results showed that the diameter of the dross is mainly influenced by gas-based processing parameters.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Anitesh Kumar Singh, Kalinga Simant Bal, Abhishek Rudra Pal, Dipanjan Dey, Asimava Roy Choudhury
Summary: This study demonstrates that by using an additional nozzle and parametric optimization, the dross height during laser cutting of Ti-6Al-4 V alloy can be significantly reduced. The modified setup with a secondary gas-flow nozzle along with the coaxial nozzle is more effective in reducing dross height and obtaining smoother cut surfaces compared to the conventional setup.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Polymer Science
Alessandro Abena, Sein Leung Soo, Sabbah Ataya, Hany Hassanin, Mahmoud Ahmed El-Sayed, Mahmoud Ahmadein, Naser A. Alsaleh, Mohamed M. Z. Ahmed, Khamis Essa
Summary: This study conducted comprehensive experimental research using the design of experiments and analysis of variance (ANOVA) to investigate the effects of machining process parameters on chip formation mechanisms, machining forces, workpiece surface integrity, and damage in cutting unidirectional CFRP. The study identified the impact of chip formation mechanisms on fibre orientation and tool cutting angle, affecting fibre bounceback and damage depth. An analytical model based on response surface analysis was developed to predict machining forces, damage, surface roughness, and bounceback. ANOVA results indicated that fibre orientation had the most significant influence on CFRP machining. Optimized cutting parameters were determined to improve surface quality and reduce forces for different fibre angles.
Article
Materials Science, Multidisciplinary
Kota Morimoto, Atsushi Yagi, Naoto Kai, Yasuhiro Okamoto, Akira Okada, Hiroaki Ishiguro, Ryohei Ito, Akihiko Sugiyama, Hiroshi Okawa
Summary: This study explores the cutting characteristics of a fiber laser beam divided into two beams by a roof axicon lens. The results indicate that the twin spot process can reduce dross height on the low intensity side during cutting.
JOURNAL OF LASER APPLICATIONS
(2022)
Article
Materials Science, Multidisciplinary
A. Mahrle, T. Wanski, A. T. Zeuner, P. Herwig, M. Zimmermann
Summary: The variable susceptibility to dross formation or cast-to-cast variations in solid-state laser fusion cutting of 2 mm stainless steel sheets was investigated. The study found that the phenomenon of dross formation correlates with the surface tension and viscosity of the melt. Cutting experiments showed that different batches of material exhibited variations in processing window and cut edge topography, emphasizing the need to consider the real composition of the materials being cut.
JOURNAL OF LASER APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Atsushi Yagi, Seigo Kadonaga, Yasuhiro Okamoto, Hiroaki Ishiguro, Ryohei Ito, Akihiko Sugiyama, Hiroshi Okawa, Rio Fujita, Akira Okada
Summary: In fiber laser cutting of steel with nitrogen assist gas, adjusting the position of the laser beam, pressure, and flow direction of the assist gas can control the formation of dross height and achieve the desired cutting quality.
JOURNAL OF LASER APPLICATIONS
(2021)
Article
Engineering, Multidisciplinary
C. Leone, E. Mingione, S. Genna
Summary: The study investigates laser cutting of Carbon Fibre Reinforced Plastics (CFRP) using high pulse power and short pulse duration, achieving cutting of 1.3 mm-thick sheets with narrow kerfs and limited Heat Affected Zone (HAZ).
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Manufacturing
Amal Charles, Ahmed Elkaseer, Umberto Paggi, Lore Thijs, Veit Hagenmeyer, Steffen Scholz
Summary: The study investigates the challenges of down-facing surfaces in metal parts produced by LPBF, focusing on residual stresses and overheating as primary causes for poor surface finish and dimensional accuracy. Design of Experiments is used to establish quadratic regression equations for predicting quality marks, with a discussion on thermomechanical processes and the reasons behind observed physical phenomena. The research confirms the feasibility of the developed models in predicting process outcomes, highlighting the impact of Volumetric Energy Density on surface roughness and dimensional error.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Naoto Kai, Yasuhiro Okamoto, Akira Okada, Hiroaki Ishiguro, Ryohei Ito, Akihiko Sugiyama, Hiroshi Okawa, Rio Fujita
Summary: The research showed that the square top-hat mode in fiber laser cutting could reduce the amount of dross produced during cutting, by distributing energy more uniformly on the cutting surface, resulting in a smaller dross height on the steel plate.
JOURNAL OF LASER APPLICATIONS
(2021)
Article
Engineering, Manufacturing
Amal Charles, Mohamad Bayat, Ahmed Elkaseer, Lore Thijs, Jesper Henri Hattel, Steffen Scholz
Summary: This study fundamentally elucidates the driving phenomenon behind dross formation in metallic component printing using Laser Powder Bed Fusion (L-PBF), and explains the reasons for the differences in dross domain size with high and low laser energy densities. Additionally, the study explains the observed deep internal grooves and near-surface porosity within the dross domain, which can affect mechanical properties.
ADDITIVE MANUFACTURING
(2022)
Article
Mechanics
F. Cepero-Mejias, V. A. Phadnis, K. Kerrigan, J. L. Curiel-Sosa
Summary: The study uses FE models to virtually assess a composite machining process, developing an original FE approach to emulate chip formation in machining of CFRP laminates. Composite damage initiation modes are evaluated via hybrid Puck-Hashin criteria, with mechanical properties of damaged elements degraded linearly. A novel strain-based element deletion criterion is applied to simulate chip release process reliably.
COMPOSITE STRUCTURES
(2021)
Article
Oncology
Emma Polonio-Alcala, Sonia Palomeras, Daniel Torres-Oteros, Joana Relat, Marta Planas, Lidia Feliu, Joaquim Ciurana, Santiago Ruiz-Martinez, Teresa Puig
Article
Chemistry, Physical
Javier Vazquez-Armendariz, Raquel Tejeda-Alejandre, Aida Rodriguez-Garcia, Yadira I. Vega-Cantu, Christian Mendoza-Buenrostro, Ciro A. Rodriguez
Article
Polymer Science
Enric Casanova-Batlle, Antonio J. Guerra, Joaquim Ciurana
Summary: Autologous treatment is the gold standard for vascular grafts, while Direct Ink Writing technology is increasingly utilized for biomedical purposes, allowing customization of each application for treating pathologies within dynamic systems.
Review
Chemistry, Analytical
David Angelats Lobo, Paola Ginestra, Elisabetta Ceretti, Teresa Puig Miquel, Joaquim Ciurana
Summary: Three-dimensional printing technologies can fabricate complex parts with accurate geometry and less production time, and can be applied to biomedical applications through direct or indirect bioprinting approaches. Scaffolds are commonly used for cell culture, but direct bioprinting may offer a more efficient way to mimic cell interactions.
Article
Materials Science, Multidisciplinary
Mariana Nunez-Nava, Elisa Vazquez, Wendy Ortega-Lara, Ciro A. Rodriguez, Erika Garcia-Lopez
Summary: The study evaluated the manufacturing process and degradation behavior of AZ31 magnesium coronary stents, finding that dip coated stents with PCL and TiO2 showed slower degradation rates compared to uncoated stents. Micro-pores and lamination were observed on coated stents after degradation, while uncoated stents exhibited notches and irregular surfaces.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Chemistry, Physical
Josue Garcia-Avila, Ciro A. Rodriguez, Adriana Vargas-Martinez, Erick Ramirez-Cedillo, J. Israel Martinez-Lopez
Summary: This study proposes an affordable manufacturing strategy for producing conductive layers with 6 x 6 matrix micropatterns of RTV-2 silicone rubber and Single-Walled Carbon Nanotubes (SWCNT). A novel mold with two cavities and two different micropatterns was designed and tested using Low-Force Stereolithography-based additive manufacturing (AM). The evaluation results showed that the resulting multilayer material exhibits high flexibility and high conductivity.
Article
Chemistry, Physical
Luis D. Cedeno-Viveros, Ciro A. Rodriguez, Victor Segura-Ibarra, Elisa Vazquez, Erika Garcia-Lopez
Summary: A novel manufacturing approach was employed to fabricate metallic scaffolds, and their performance was evaluated through multiple testing methods. The results demonstrated that the fabricated scaffolds exhibited favorable properties, similar to cortical bone. This new manufacturing method shows promising potential in bone tissue engineering applications.
Article
Oncology
Emma Polonio-Alcala, Marc Rabionet, Santiago Ruiz-Martinez, Sonia Palomeras, Rut Porta, Carmen Vasquez-Dongo, Joaquim Bosch-Barrera, Teresa Puig, Joaquim Ciurana
Summary: This study evaluated the use of PCL-ES scaffolds for culturing LCSC population in EGFR-mutated lung adenocarcinoma models, showing higher drug resistance and upregulation of genes and proteins related to stemness. The non-expression of CD133 was associated with disease progression and distant metastasis in EGFR-mutated non-small cell lung cancer patients.
Article
Polymer Science
Mario R. Moreno-Guerra, Oscar Martinez-Romero, Luis Manuel Palacios-Pineda, Daniel Olvera-Trejo, Jose A. Diaz-Elizondo, Eduardo Flores-Villalba, Jorge V. L. da Silva, Alex Elias-Zuniga, Ciro A. Rodriguez
Summary: In this article, a new formulation for real-time simulation is developed combining the strain energy density of the Spring Mass Model (SMM) with the equivalent representation of the Strain Energy Density Function (SEDF). The proposed model, called Equivalent Energy Spring Model (EESM), accurately predicts the mechanical behavior of soft tissues in real-time.
Article
Chemistry, Physical
Luis H. Olivas-Alanis, Antonio Abraham Fraga-Martinez, Erika Garcia-Lopez, Omar Lopez-Botello, Elisa Vazquez-Lepe, Enrique Cuan-Urquizo, Ciro A. Rodriguez
Summary: The development of additive manufacturing processes has allowed for the production of complex and smart structures. This study investigated the mechanical behavior of different lattice structures through experimental and computational methods. The results highlighted the significant impact of cell shape, size, and orientation on the mechanical properties of the materials.
Article
Polymer Science
Josue Garcia-Avila, Diego de Jesus Torres Serrato, Ciro A. Rodriguez, Adriana Vargas Martinez, Erick Ramirez Cedillo, J. Israel Martinez-Lopez
Summary: This paper explores the fabrication of flexible nanocomposites using polydimethylsiloxane (PDMS) and single-walled carbon nanotubes (SWCNTs), and generates prediction models for the mechanical properties of these materials using neural networks.
Article
Chemistry, Analytical
Juan Enrique Perez-Cortez, Victor Hugo Sanchez-Rodriguez, Salvador Gallegos-Martinez, Cristina Chuck-Hernandez, Ciro A. Rodriguez, Mario Moises Alvarez, Grissel Trujillo-de Santiago, Elisa Vazquez-Lepe, J. Israel Martinez-Lopez
Summary: Currently, light-based bioprinter manufacturing technology is expensive and not widely adopted due to the high cost of bioinks and lack of information regarding parameter selection. This paper presents a retrofitting and assessment of a low-cost light-based 3D printing system for tissue engineering. The study includes a manufacturability test and a successful case study using previously seeded hydrogel with live cells. The results show promising viability, elongation, and alignment of the 3D bioprinted structures, demonstrating the potential of low-cost equipment for creating high-resolution structures and in vitro models.
Article
Robotics
Gabriel E. Navas-Reascos, David Romero, Ciro A. Rodriguez, Federico Guedea, Johan Stahre
Summary: With the increasing intelligence of products and assets, the demand for extensive wiring and wire harnesses is growing. However, the current wire harness assembly processes are complex and manual, which leads to ergonomic problems for assembly workers. This paper proposes the use of collaborative robots to improve work ergonomics and reduce the ergonomic risks in wire harness assembly processes. Through a case study, it is proven that the integration of a cobot significantly reduces non-ergonomic postures and achieves acceptable ergonomic values.
Review
Engineering, Manufacturing
Javier Vazquez-Armendariz, Luis H. Olivas-Alanis, Tobias Mahan, Ciro A. Rodriguez, Michael Groeber, Stephen Niezgoda, Jonathan M. Morris, Hany Emam, Roman Skoracki, Jian Cao, Beth Ripley, Joseph Iaquinto, Glenn Daehn, David Dean
Summary: Currently, POCM is mainly performed at advanced medical centers for the production of 3D printed anatomic models and surgical guides. It is highly important to ensure safe and effective POCM for personalized interventions in cardiac, trauma, cancer resection/radiosurgery, and neurological surgery. Patient awareness has increased the demand for personalized procedure planning, surgical guides, and implantable devices, which can be achieved through workflows that incorporate MM, HAM, and ICME. This article discusses a preliminary design and testing of a workflow for personalized mandibular graft fixation hardware.
INTEGRATING MATERIALS AND MANUFACTURING INNOVATION
(2023)
Article
Engineering, Biomedical
Marc Rabionet, Emma Polonio-Alcala, Joana Relat, Marc Yeste, Jennifer Sims-Mourtada, April M. Kloxin, Marta Planas, Lidia Feliu, Joaquim Ciurana, Teresa Puig
Summary: Research has found a potential novel target for TNBC treatment by focusing on breast cancer stem cells, using three-dimensional scaffolds to maintain stemness and alter cell signaling pathways. Additionally, inhibition of fatty acid synthase was shown to reduce stem cell population, overcoming the expansion seen in 3D culture.
MATERIALS TODAY BIO
(2021)
