Thème :
TOPOLOGY OPTIMIZATION OF A 41CR4 STEEL CONNECTING ROD FOR A DEUTZ F4L912 TRACTOR ENGINE USING THE SIMP METHOD
Présentation :
The current research presents a novel approach involving design enhancement and topology optimization analysis of the Deutz F4L912 tractor engine connecting rod. Aiming to significantly decrease mass while preserving structural integrity under tensile loads by implementing a streamlined workflow utilizing FreeCAD, Gmsh, PrePoMax/CalculiX, and a Python-driven SIMP (Solid Isotropic Material with Penalization) loop. The optimized rod exhibits a projected 20% mass reduction while retaining similar structural performance, as confirmed by compliance, stress distribution, and mass savings analyses. This study provides manufacturers with a cost-effective methodology for improving mechanical component design, enabling substantial resource savings via mass minimization.
Thème :
Leveraging Predictive Analytics in Educational Platforms: A Case Study with the ZTAP Application
Présentation :
The digitalization of education has generated vast amounts of student data, creating new opportunities for analytical insight. The ZTAP application, an educational management tool, ser ves as a rich ecosystem for collecting real-time data on student engagement. This paper addresses the challenge of proactively identifying at-risk students, a task that is often time-consuming for educators. We present the "Student Success Predictor," a novel feature integrated into ZTAP that utilizes a weighted,multi-factor algorithm to analyze key student engagement metrics. The system provides educators with a clear, color-coded dashboard that visualizes the predicted performance of each student, enabling them to identify and support struggling individuals.
Thème :
Steel and Alloys, Fluid Mechanics and Tribology
Présentation :
This special edition focuses on materials engineering topics central to mechanical engineering and is dedicated to analysing the behaviourof structural materials, their processing methods, tribological properties, and the use of computational procedures for designing fluid systems. Chapter 1: Properties and Processing Technologies of Steel and Alloys.This chapter explores the applied aspects of steel and alloy development and processing, including microstructural and mechanical characteristics analysis. The part covers advanced high-performance processing techniques with wide applications in construction and machinery.Chapter 2: Mechanics of Materials and Tribology.The second chapter is devoted to the results of the investigation of the mechanical behaviour of materials under various loading conditions. In addition, the tribology section focuses on surface interactions -friction, wear, etc.-that are critical for component longevity in machine design. Integrating mechanics of materials and tribology gives insights into material selection and design optimisation in real-world engineering systems.Chapter 3: Fluid Mechanics.The final chapter presents examples of applications of fluid mechanics computational procedures in engineering analysis and design of fluid systems. Topics include fluid statics and dynamics, continuity and momentum equations, laminar and turbulent flow, and boundary layer theory. Practical examples are provided in the context of engineering systems such as pipelines, turbines, pumps, and aerodynamic structures.This edition aims to equip readers with a well-rounded understanding of the nature of some key engineering solutions and principles driving innovation across multiple sectors of modern industry
Thème :
A New Approach to Evaluating Friction and Wear Behavior of α-β Phase of AA6061 and CuZn37Pb2 under Different Testing Conditions
Présentation :
Wear is a persistent industrial problem caused by the interaction of many interlocking and complex elements. CuZn37Pb2 and AA 6061 are particularly prone to wear due to their numerous industrial applications. To address this problem and contribute to the scientific literature, a comprehensive experimental investigation was conducted to understand and analyze the impact of these interconnected factors. This research developed a dry and lubricated horizontal lathe wear test apparatus. Various parameters, including contact temperature, wear loss, wear rate, and friction coefficient, were compared across different initial surface roughness levels, loads, sliding speeds, wear track diameters, and track widths. Experiments were performed at torques ranging from 25 to 100 N, speeds of 0.30, 0.40, and 0.50 m/s, and wear track diameters of 4, 6, 8, and 10 mm. SEM-EDS, XRD, and optical microscopes were used to examine each sample's worn surfaces and wear tracks. The morphological structure of the sample and the type of test have distinct impacts on the tribological response of the surfaces, each of which interacts uniquely, with influence varying depending on the tribological parameters. Generally, secondary phases (AA 6061) can lead to improved wear resistance due to their harder and more wear-resistant nature compared to the primary aluminum matrix. Conversely, the alpha phase of CuZn37Pb2 is harder and stronger than the beta phase and thus has better wear resistance properties. The error in wear rate calculations is 58.6% in both tests. The findings indicate that the tribological response in ideal laboratory conditions differs from that in actual field environments. This research provided significant insights into understanding and analyzing wear by addressing the largest number of characteristics previously unexplored. Additionally, the findings revealed that while completely eliminating wear is challenging, it can be significantly reduced. Laboratory wear experiments can be extrapolated to field wear tests, offering prototypes for industrial challenges and linking academic research with industry issues.
Thème :
The Effect of Glass and Palm Fibers on the Mechanical and Thermal Properties of Compressed Earth Blocks (CEB) Stabilized with Cement
Présentation :
Modern research is focused on the discovery of new compounds that meet the requirements of modern construction. An example of low energy consumption is that buildings consume between 20% and 40% of energy. In this research, the effect of fiber addition on the properties of compacted earth bricks composed of clay and sand and fixed with cement is studied. Fiberglass or palm are used in different proportions (0% and 0.4%). This is done by studying the change in mechanical and thermal properties. The study focuses on clarifying the role of fiber type and the amount of compressive force applied to the soil. To change the properties of bricks. This is studied using experimental methods and systematization criteria. The results showed a decrease in density by 9.1%, with a decrease in water absorption by 8%, an increase in brick hardness by 42.7%, and a decrease in thermal conductivity by 22.2%. These results show that the addition of fiber improves mechanical and thermal properties. Which reduces energy consumption. The results are important because they explain the changes that occur in the earth block when palm fibers and glass are added and how they are used to improve earthen buildings.
Thème :
The impact of fibres reinforcement on the thermal characteristics of lime-stabilised compressed earth blocks
Présentation :
In civil engineering, the use of fibers in construction has spread recently, because of their many benefits in terms of increasing the cohesion of buildings and their thermal insulation. In addition to having several good physical and mechanical properties. Thermal insulation has become an important thing in the field of construction. Because it is linked to increasing the lifespan of buildings and predicting their thermal behavior. It includes increasing energy efficiency and reducing its costs. Fibers are used to increase thermal insulation, because it creates voids inside the structures that are within its content, and thus impedes the transfer of heat, regardless of the type of transfer by convection, radiation, or conductivity. This study aims to determine the amount of thermal insulation in compressed earth bricks with dimensions of 20 × 10 × 10 cm3, to which palm fibers and glass are added in different proportions: 0%, 0.1%, 0.2%, 0.3%, 0.4% and 0.5%.In earthen bricks composed of soil, sand and lime. The study includes the physical, mechanical and thermal properties of these bricks. We focus on thermal insulation in the best samples in terms of hardness. Laboratory samples were taken according to standard experiments in university laboratories. Preliminary results showed a decrease in bulk density between 6% and 8.34%, an increase in mechanical stresses between 42.85% and 45.45%, and an increase in thermal insulation between 26% and 29%. These results give us an overview of the impact of using fibers in construction in terms of increasing weight bearing and predicting the amount of thermal insulation.
Thème :
Use of iron oxide nanomaterials as adsorbents for wastewater treatment
Présentation :
The dissemination of chemical components into the environment might provoke harm to human health, animal species and the ecosystem. In order to reduce the negative effects of those pollutants, physico-chemical treatment procedures, namely the adsorption technique has been implemented. This study seeks to synthesize manufactured nanomaterials throughout a co-precipitation process such as nanoparticles (Ferrihydrite (Fh)) and nanocomposite magnetic iron (magnetite / activated carbon) capable of adsorbing certain inorganic species (heavy metals) such as hexavalent chromiumCr (VI). The prepared supports were characterized by IRTF analysis. The influence of the various experimental parameters (the initial concentration and the contact time) have been studied. Various isothermal models have been applied, namely Langmuir, Freundlich, Temkin and BET. The study of those absorption isotherms has shown that Langmuir’s model describes better Cr (VI) adsorption. It has been also noticed that the adsorption process on the Fh follows a pseudo 2nd order kinetics for the hexavalent chromium. The experimental results have proved that equilibrium is reached after 15 minutes with a better yield of 99.511% and a maximum retention capacity of 40.9157 mg / g
Thème :
Renewable energies for sustainable development
Présentation :
Electrical energy is an important component of human life, especially in rural areas and far from energy sources. In Algeria, the use of renewable energies has recently spread in rural areas, because the use of these energies achieves sustainable development and preserves the environment. In this research, we will conduct a comparison of energy production using the method of using fuels and using the method of using solar panels in terms of energy efficiency and production cost. This research aims to combine the citizen, the environment and the economy. We use scientific methods and laboratory equipment for experiments. Preliminary results show that traditional energies produce the largest electricity, but they pollute the environment and have the highest cost of equipment. This is what further reinforces our trend towards the use of renewable energies.
Thème :
Change in the physical properties of concrete when adding fibers
Présentation :
Concrete is a material consisting of mixing cement, gravel and sand with a certain proportion of water. It is characterized by hardness, durability and high ability to resist climatic factors. The addition of fibers to concrete has become a topic of interest for researchers because the fibers increase the strength of concrete and improve its resistance to fire and thermal insulation. In this context, we will conduct a study on homemade concrete bricks that focuses on the effect of adding plant fibers (palm leaf fibres), synthetic fibers (glass fibres), and animal fibers (camel hair). We run tests on these bricks to find out the hardness, density and speed of the sound, we study thermal behavior by knowing the thermal conductivity. and we know the amount of hardness by knowing the value of the stresses required to break the samples. Therefore, the results showed that adding variable percentages between 0% to 0.5% of these fibers changes some physical properties such as density(2%-12%), sound transmission speed within samples(7%-15%), the amount of applied stresses(12%-45%) and thermal conductivity(4%-11%).The results of these experiments give us a general idea of the effect of adding these fibers to concrete.
Thème :
Numerical Study on Dimensions and Orientation Effect of Semi-Elliptical Cracks in PE100 Pipelines
Présentation :
The through-thickness crack or surface crack in PE100 pipes subjected to internal pressure represents a serious risk to the structural integrity of HDPE pipes, which has attracted wide attention in modern industry. Although experimental research offers reliable predictions of surface crack influence on pipes, the relatively high cost hinders its application. The numerical simulation, as a cost-effective alternative, has been widely applied to assess stress displacement and strain to the entire pipe structure. This is the initial approach adopted in recent decades. This article provides simulations tests of an uncracked pipe and cracked PE100 pipe under different internal pressure values, with varying each time the dimensions of the crack with 1 mm rate for minor and major radius and 0. 5mm rates for the largest contour radius, using ANSYS MECHANICAL STRUCTURAL STATIC for simulation.
Thème :
Lack of Penetration of Welded Pipe and Stress Behavior
Présentation :
Use of too low a welding current, the practical use of too slow a
travel speed, and an incorrect torch angle, in common are the most
effects can cause penetration defects In this methodological study, we
will do some analyses of stresses concentration on welding throat area
on Pipe manufactured by API 5l X52 material and carefully compare
necessary results between a good welded pipe and another one lacked
from penetration; for that we typically apply five different pressures to
naturally limit the desired results, this numerical study reasonably requires
using SOLIDWORKS for ultimate conception and launch simulation with
ANSYS after importing the specific geometry.
Thème :
Simulation of Scratch and Dent Defects in Gas Pipelines
Présentation :
The safe, efficient means of transportation of petroleum crude oil and natural gas are pipelines. Wherever the pipeline crosses, it is always exposed to the risk of damage, and in particular of damage caused by contact with a foreign body. This research aims to illustrate the harmfulness of defects caused by external attacks, such as scratches, the dents and the combination of the two defects on the conduct of an intended gas transport pipe at the same time. The criteria for the three cases have changed and simulation was done with the calculation tool Ansys. With constant internal pressure and changing the geometry of the defect (scratch, dent and a mixture of the two defects), the result shows that the stresses near the failures are high adding to the important displacements and deformations, which could cause damage or pipeline rupture.
Thème :
Tests on aluminum parts welded with different orientations using FSW
Présentation :
The most promising alternative to traditional methods (arc welding, riveting, etc) is considered to include friction stir welding (FSW) among assembly processes. It is known as a process for welding materials in the solid-state, thus removing defects relating to the solidification process and material addition. For the montage of aluminum alloys used in the aeronautical industry, FSW welding is especially interesting. It has always been a challenge of how to weld in mechanical engineering. The concern of the engineer was to find methods to make welding easy to identify. The aim of the current research is to study the effects of the use of FSW. The analysis of several research specimens welded using the FSW process technology using a 6060 T5 aluminum alloy will be of interest to us. We have tested nine aluminum parts in this analysis: three longitudinally welded, three transversally welded, and three are separated (not welded). The three applied tests are the tensile test, the hardness of Vickers and the X-ray. Ultimately the outcomes of all experience are examined for the evaluation of material characteristics and for the consistency of the Welding process Friction Stir Welding.
Thème :
Comparative Study On Hdpe Pipes
Présentation :
For a good transport of water as well the safety by means of a pipeline and the way to using them we must have a good structure and choose the right geometry, without forget that they are exposed to cracking, erosion and humidity by environment. It is essential to monitor continuously the pressure of the canalizations over the entire length, because of pressure drop can occur on a part of the pipe that allows us to detect leaks, trigger and corrective measures (water flow stop at the pumping stations). Through this simple experience we will design new structures and geometry of pipe to improve their performance. For this purpose we have found it is necessary to use the internal pressure PE100 while using the SOLIDWORKS code for conception and ANSYS design calculation code for the simulation after changing the geometry of the tube section.
Thème :
Modélisation D’une Fissure Dans Un Pipeline Sous Pression Interne.
Présentation :
La Modélisation de la croissance des fissures dans le matériau d’un pipeline sous la pression d’un fluide dans la zone affectée thermiquement (ZAT) est un sujet très complexe. Les principales lois d’influence du rapport de contrainte sur le taux de croissance des fissures de fatigue dans la zone affectée par la chaleur ont pu définir deux types d’orientations de la fissure, les différentes zones de contraintes maximales et les déplacements des nœuds, ainsi que le phénomène de déformation de la fracture. On a supposé une Pression de fonctionnement comme une charge, tenant compte des propriétés mécaniques du matériau, donnant la possibilité de créer une distribution de matière permettant de montrer la forme de déformation finale de la fissure.
Thème :
Etude de la résistance des pipelines en PE sous pression interne
Présentation :
Pour un bon transport de gaz ainsi que la sécurité par le biais d'un pipeline, moyen utilisé, ce dernier doit avoir une bonne fiabilité et une résistance à la déformation, comme il ne faut pas oublier que les pipelines sont exposés au fissuration, à l'érosion et à l'humidité dans un milieu ambiant. Il est indispensable de surveiller en permanence la pression du pipeline sur toute sa longueur, car une chute de pression peut surgir sur une partie de gazoduc qui nous permet de détecter les fuites et de déclencher des mesures correctives (arrêt du flux de gaz au niveau des stations de pompage). A travers cette expérience simple, nous allons faire une étude comparative entre les 3 matériaux utilisés à la construction des tubes de gaz afin d'améliorer les performances de ces derniers. Nous avons testé deux différentes valeurs de la pression correspondant à chaque pipe (PE80 et X65). A cet effet nous avons jugés nécessaire d'utiliser le PE80, PE100 et le API X65 sous pression interne tout en utilisant le code SOLIDWORKS pour la conception et le code de calcul ANSYS pour la simulation après avoir comparer les résultats obtenus.