Article
Geosciences, Multidisciplinary
Matthew Deutsch, Kadri Dagdelen, Thys Johnson
Summary: This paper introduces MineFlow, an open-source C++ library that provides efficient and flexible precedence schemes and a simplified pseudoflow-based solver. Through a computational comparison with five commercial packages, MineFlow consistently computes identical results in a shorter time. These improvements are achieved by using implicit precedence schemes and making slight modifications to the conventional pseudoflow algorithm. Additionally, a compact notation for the pseudoflow algorithm is presented to assist educators in teaching ultimate pit optimization.
NATURAL RESOURCES RESEARCH
(2022)
Article
Engineering, Manufacturing
Jordan Garcia, Robert Harper, Y. Charles Lu
Summary: This paper investigates the mechanical properties of fiber-reinforced polymer composites fabricated by traditional manufacturing techniques and additive manufacturing (3D printing) techniques. The study finds significant discrepancies and anisotropies in the mechanical properties of 3D-printed composites. The orientation of the filaments has a strong influence on the mechanical responses of the parts. The 3D-printed parts exhibit inferior properties compared to those made by conventional manufacturing. The paper also explores the use of theoretical modeling to predict the mechanical responses and optimize the 3D printing process.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Biomedical
Ariel Hernan Curiale, Agustin Bernardo, Rodrigo Cardenas, German Mato
Summary: This paper introduces an open-source application CardIAc as an alternative to commercial software for left ventricle myocardial strain quantification. It provides a useful extension for myocardial strain analysis that promotes easy modification and adjustment to different motion tracking strategies for improved accuracy. The software is intended for research use and allows users to tailor the program's performance to their scientific or clinical requirements.
INTERNATIONAL JOURNAL OF COMPUTER ASSISTED RADIOLOGY AND SURGERY
(2021)
Article
Agronomy
Abdur Rahim Safi, Poolad Karimi, Marloes Mul, Abebe Chukalla, Charlotte de Fraiture
Summary: This paper introduces a standard approach using open-source remote sensing data to diagnose reasons behind crop water productivity (WP) variations, and demonstrates the feasibility and practical usefulness of the diagnostic framework through a case study.
AGRICULTURAL WATER MANAGEMENT
(2022)
Article
Nanoscience & Nanotechnology
Yuzhong Miao, Meini Yuan, Zhiqiang Fan, Xidong Wang, Zhaocan Li, Xiaosheng Zhou, Honglin Wang
Summary: Ti/Al3Ti Heterogeneous Structures with different fractions of residual Al were fabricated by adjusting the hot-pressing temperature, and their grain boundary distribution, mechanical properties, and failure modes were analyzed. The addition of residual Al significantly improved the elongation of Ti/Al3Ti/Al HS by promoting strain flow and stabilizing shear strain. Furthermore, the grain refinement of the TC4 layer enhanced the tensile strength and work-hardening capability. The localized characterizations provided valuable insights for the technics-properties design of Ti/Al3Ti HS.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Computer Science, Software Engineering
Mimi Luo, Jiayu Qin, Gang Mei
Summary: Numerous software packages implementing the SPH method have been developed for analyzing scientific and engineering problems. However, very few packages have considered both efficiency and readability. To address this, we have designed and developed juSPH, an open-source package of parallel SPH based on Julia. We have described juSPH in terms of methodology, software architecture, and functionalities, and validated its accuracy and evaluated its efficiency through a dambreak experiment. Furthermore, the modular structure of juSPH ensures code readability and facilitates further development.
Article
Biophysics
Krishna Pedaprolu, Spencer E. Szczesny
Summary: Tendon overuse is a major risk factor for tendinopathy, which can lead to tissue degeneration. The specific mechanisms linking tendon fatigue damage with tissue degeneration are still unclear. Researchers have developed a novel, low-cost, load-controlled bioreactor to study fatigue-induced tendon degeneration in a more physiologically relevant and cost-effective manner.
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Thermodynamics
Yue Liu, Ju Dong, Terrence R. Tiersch, Qinglin Wu, William T. Monroe
Summary: With the increasing recognition of open scientific hardware, rapid prototyping technologies like 3-D printing are becoming more widely available for fields such as cryobiology and cryopreservation. Understanding the mechanical properties of 3-D printing materials at cryogenic temperatures is crucial for material selection and printing optimization. This study aims to explore the feasibility of developing a 3-D printed device for evaluating material behaviors at cryogenic temperatures.
Review
Chemistry, Multidisciplinary
Zhichao Pan, Gang Dong, Chi Shang, Ruihao Li, Tengyang Gao, Luchun Lin, Huicong Duan, Xiaohui Li, Jie Bai, Yilin Lai, Wenfeng Wu, Jia Shi, Junyang Liu, Wenjing Hong
Summary: Characterizing the charge transport of single-molecule junctions is crucial for fundamental research and development in the field of single-molecule electronic devices. However, interpreting the data obtained from single-molecule break junction technique can be challenging, leading to misunderstandings and reproducibility issues. To address this, a user-friendly all-in-one data analysis tool called XMe Code is presented in this work, offering comprehensive analysis and transparency in single-molecule electronics.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
L. Summey, J. Zhang, A. K. Landauer, J. Sergay, J. Yang, A. Daul, J. Tao, J. Park, A. Mcghee, C. Franck
Summary: This article introduces a micro-tensile impact device for soft materials and in vitro cellular biomechanics investigations, which provides high spatial and temporal resolution volumetric strain field measurements, non-destructive testing and gripping of low elastic modulus materials, and programmable strain rates. The reliability and applicability of the device are validated through experiments.
EXPERIMENTAL MECHANICS
(2023)
Article
Construction & Building Technology
Zhifang Dong, Jie Dai, Mingke Deng
Summary: Textile reinforced mortar (TRM) is a compatible alternative to fiber reinforced polymer (FRP) intervention. The study investigated the coupling effect of seismic strain rate and short polyvinyl alcohol (PVA) fibers on the mechanical properties of carbon TRM. Tensile samples were designed to examine the relationships between strain rate, volume content of PVA fibers, grid number, and matrix type. Results showed that crack and peak strength can be enhanced with strain rates ranging from 10(-5) to 10(-1) s(-1), confirming the strain-rate sensitivity. Short PVA fibers and reinforced textile grids effectively improved crack and peak strength under static and seismic strain rates. A quantitative model was proposed to estimate the tensile strength of TRM under static and dynamic strain rates based on strain rate and short fibers index.
STRUCTURAL CONCRETE
(2023)
Article
Nanoscience & Nanotechnology
Hui Tao, Huizhong Li, Li Wang, Yixuan Che, Weiwei He, Huixia Li, Rui Zhou, Xiaopeng Liang
Summary: This study investigated the effect of small-strain forging on the microstructure and mechanical properties of a Ti-48Al-2Cr-2Nb alloy prepared by selective electron beam melting (SEBM). It was found that small-strain forging reduced the fraction of coarse grains and promoted the formation of fine sub-grains and alpha 2/gamma lamellar colonies. This led to an increase in tensile strength and ductility. Additionally, the anisotropy of tensile properties was reduced after small-strain forging. The results suggest that small-strain forging is an effective post-treatment method for improving the mechanical properties of SEBM prepared TiAl alloys at high temperatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Characterization & Testing
Rainer Schwab, Anton Harter
Summary: This study addresses two issues in extracting flow curve from nominal stresses and strains in standard tensile testing. It provides exact analytical solutions for true stresses and strains, considering elastic volume changes, and uses a new macroscopic analytical approach to determine the real material behavior in the Luders region. Both approaches are verified through experiments and simulations with good agreement.
Article
Engineering, Electrical & Electronic
Qingfang Zhang, Qianyu Chen, Jitao Zhang, Wenxiang Lu, Pei Zhang, Zirui Qin, Lingzhi Cao, Genquan Han
Summary: Researchers propose a new idea of utilizing group-IV GeSn alloys for short-wave infrared light sources compatible with CMOS, which can be transformed into direct bandgap alloy and integrated on the Si platform at low cost. More than 7.1% Sn content or strain engineering is used to achieve direct bandgap GeSn semiconductors, enhancing the luminous efficiency of GeSn light-emitting devices.
IEEE PHOTONICS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Mohammad M. Kaykha, Mohammad R. Dashtbayazi
Summary: The constrained studded pressing (CSP) method was modified to produce ultra-fine-grained copper sheets, resulting in improved uniformity of the distribution of effective plastic strain. The modified-CSP process showed higher strain capability and greater tensile properties compared to CSP and constrained groove pressing (CGP). The microstructure of the copper sheets produced by modified-CSP exhibited decreased grain size and the presence of twins bands with increasing plastic strain.
Article
Engineering, Manufacturing
Chris Esposito, Chiara Cosenza, Salvatore Gerbino, Massimo Martorelli, Pasquale Franciosa
Summary: The precise control of part-to-part gaps is a major challenge in the assembly process of aircraft skin panels. The current practice of manual measurement and adjustment is time and cost ineffective. This study proposes a new methodology using in-line measurement systems and physics-based simulations to predict the part-to-part gap, reducing the need for multiple quality loops.
INTERNATIONAL JOURNAL OF INTERACTIVE DESIGN AND MANUFACTURING - IJIDEM
(2022)
Article
Engineering, Mechanical
Michel Azar, Marzio Grasso, Timothy Rose, Owen Carless, Chris StLeger-Harris, Carl Lawson
Summary: This article presents a combined experimental and numerical approach to analyze the failure of a heave damper hydraulic seal for racing car. The combination of evidence collected from numerical simulation and observation of surface damages on the seals proved that the cause of failure was insufficient lubrication during high frequency, short stroke applications. A new seal design requiring further study and testing has been proposed.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Chemistry, Physical
Pietro Ausiello, Eleonora Bolli, Saulius Kaciulis, Antonio Gloria, Antonio Lanzotti, Massimo Martorelli, Alessio Mezzi, Roberto Montanari, Maria Richetta, Alessandra Varone
Summary: Titanium and its alloys are commonly used in commercial dental devices. This study investigated the surface morphology and chemical composition of different commercial dental implants through scanning electron microscopy and X-ray photoelectron spectroscopy. The results revealed common features and differences among the implants, as well as the presence of metal oxides on their surfaces.
SURFACE AND INTERFACE ANALYSIS
(2023)
Article
Materials Science, Composites
Marzio Grasso, Yigeng Xu
Summary: This paper investigates the failure mechanisms of woven composites through experimental analysis. The results show that it is difficult to identify the initiation of delamination under low velocity impact. A preliminary discussion is presented regarding the nature of delamination propagation in woven composites.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Materials Science, Composites
Veronica Marchante Rodriguez, Marzio Grasso, Yifan Zhao, Haochen Liu, Kailun Deng, Andrew Roberts, Gareth James Appleby-Thomas
Summary: The present research focuses on the failure analysis of composite panels impacted at a high velocity and angle. Carbon-fibre panels with and without external Kevlar layers were used in impact tests with different energy levels. The effects of mass and contact area on damage were examined using sharp and smooth gravels. Optical microscopy and thermography analyses were conducted to evaluate internal and surface damage. The results indicate that sharp impactors created more damage, but the presence of a Kevlar layer increased penetration limit and reduced damage level in the panels.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Mechanics
Marzio Grasso, Yuanli Bai, James Brighton, Owen Carless, Chris StLeger-Harris
Summary: This article compares three plasticity models, BW, von Mises, and Drucker Prager, to predict failure modes in double-lap metallic bolted joints under shear loading. The validation of the double-lap bolted joint finite element model against literature data demonstrates the applicability of the BW ductile fracture model in predicting bolt joint failure. The effects of geometrical parameters, preload, and stress triaxiality on failure modes are investigated using Taguchi Design. The force-displacement response among the three models differs up to 20% during shear failure, and a different prediction of failure modes (shear out vs. net section) under the same loading and geometry conditions is observed.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Mechanical
Wentao Xu, Olivier Le Roux de Bretagne, Marzio Grasso, Matthew F. Harrison, Owen Carless, Chris StLeger-Harris
Summary: This manuscript proposes a new methodology for predicting the fatigue state of the connecting rod in automotive and motorsport applications. The method is based on individual engine speed damage estimation and the Palmgren-Miner linear damage rule. It utilizes track data, engine multibody simulation, engine combustion simulation, and finite element analysis to estimate the stress amplitude, damage from S-N curve, and cumulative damage. A connecting rod case study is used to demonstrate the suitability and accuracy of the approach in predicting fatigue life.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2023)
Article
Engineering, Aerospace
Amit Ramji, Marzio Grasso, James Chase, Hasher Maqbool, Michal Krypciak, Veronica Merchante, James Brighton
Summary: This paper presents a finite element modelling strategy to study the structural response of aircraft tyres under different load conditions. The model successfully simulates the interaction between the tyre and the ground, considering various rolling movements. The results are validated by comparing with experimental data, showing good agreement in stiffness.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2023)
Article
Polymer Science
Francesco Gucci, Marzio Grasso, Stefano Russo, Glenn J. T. Leighton, Christopher Shaw, James Brighton
Summary: In this study, a blend of PEO, PSF, and LiTFSi was prepared with different PEO-PSf weight ratios and EO/Li ratios. The samples were characterized and their mechanical and electrical properties were evaluated. The PEO-PSf 70-30 EO/Li = 30/1 configuration showed a good balance between electrical conductivity and Young's modulus.
Article
Polymer Science
Francesco Gucci, Marzio Grasso, Christopher Shaw, Glenn Leighton, Veronica Marchante Rodriguez, James Brighton
Summary: This study investigates the mechanical and ionic conductivity properties of Polyethylene oxide (PEO) blends using polysulfone (PSf) and Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). The results show that the addition of LiTFSI improves the mechanical strength and ductility of PEO, and the PEO-PSf blends exhibit good ionic conductivity at room temperature.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2023)
Proceedings Paper
Engineering, Multidisciplinary
Massimo Martorelli, Vito Gallicchio, Antonio Gloria, Antonio Lanzotti
Summary: This study evaluated the impact resistance of 3D printed PETG and HIPS under different printing parameters, and found that printing temperature is the most significant factor affecting the impact resistance.
DESIGN TOOLS AND METHODS IN INDUSTRIAL ENGINEERING II, ADM 2021
(2022)
Proceedings Paper
Engineering, Multidisciplinary
Chiara de Crescenzo, Maria Richetta, Massimo Martorelli, Antonio Gloria, Antonio Lanzotti
Summary: Titanium alloys, such as Ti6Al4V, have been widely used in the design of biomedical implants. 3D porous devices with controlled geometry and architecture are promising for avoiding adverse effects on bone caused by stress shielding and implant loosening. This research focuses on the design of solid-lattice hybrid structures using a two-step process of classical and lattice topology optimization. The study found that the selected strategy for material distribution and geometric features had an impact on the functional and structural performances of the hybrid structures.
DESIGN TOOLS AND METHODS IN INDUSTRIAL ENGINEERING II, ADM 2021
(2022)
Article
Dentistry, Oral Surgery & Medicine
Joao Paulo Mendes Tribst, Dayana Campanelli de Morais, Jefferson David Melo de Matos, Guilherme da Rocha Scalzer Lopes, Amanda Maria de Oliveira Dal Piva, Alexandre Luiz Souto Borges, Marco Antonio Bottino, Antonio Lanzotti, Massimo Martorelli, Pietro Ausiello
Summary: This study evaluated the influence of distal implants angulation and framework material on the stress concentration of an All-on-4 full-arch prosthesis. The results showed that distal implants angled in 45 degrees with a 6-mm cantilever arm had the lowest stress peaks, but distal implants angled in 45 degrees with a 10-mm cantilever arm showed the highest stress concentration when considering a PEEK framework.
Proceedings Paper
Polymer Science
Pierpaolo Fucile, Teresa Russo, Roberto De Santis, Massimo Martorelli, Michelina Catauro, Antonio Gloria
Summary: Additive manufacturing technologies enable the direct fabrication of 3D scaffolds for tissue regeneration with improved properties. By utilizing design strategies and 3D fiber deposition technique, advanced scaffolds with different lay-down patterns and tailored mechanical and biological properties can be developed. The surface modification of 3D poly(epsilon-caprolactone) scaffolds (i.e., aminolysis) is assessed for its effects on the mechanical and biological performances of the designed scaffolds.
MACROMOLECULAR SYMPOSIA
(2021)
Proceedings Paper
Polymer Science
Roberto De Santis, Teresa Russo, Pierpaolo Fucile, Massimo Martorelli, Michelina Catauro, Antonio Gloria
Summary: The aim of the research is to develop 3D porous and light-activated composite structures with optimized functional properties, with preliminary mechanical and biological tests carried out to meet the demand for using nondegradable scaffolds and mesenchymal stem cells in regenerative medicine.
MACROMOLECULAR SYMPOSIA
(2021)
