Kazem reza kashyzadeh

Peoples' Friendship University of Russia | rudn · Transport

The movement of sediment particles in rivers significantly hinders the development of hydropower plants across sediment-laden rivers. There are plenty of hard particles, such as feldspar and quartz. Particularly at high- and medium-head hydropower facilities, the abrasive impact of these particles causes wear hydro turbines. Production losses and m...

The main aim of the present research is to improve the static tensile strength of Carbon/Kevlar/Epoxy hybrid composite by adding different nanoparticles. To this end, two well-known nanoparticles namely Nano-Silica and Nano-Graphene were considered. Also, the total percentage of adding nanoparticle reinforcing elements to the hybrid composite was c...

This research investigates the effectiveness of various vibration data acquisition techniques coupled with different machine learning models for detecting anomalies and classifying them. To this end, synthetic vibration data was generated for techniques such as Eddy Current Proximity Transducers (ECPT), Accelerometer Sensor (AS), Blade Tip Timing (...

Application of Kaplan turbines is widespread in low-water-head and large-capacity hydropower plants. An understanding of the failure mechanism of Kaplan Turbines is a key factor to provide useful solutions for their prevention or early treatment and to guarantee their workability. The long-term performance of Kaplan turbines depends on many factors...

Online-monitoring systems are used to monitor the health of power plant equipment. In this regard, by installing various sensors on equipment, the values of important parameters are monitored online from the engineering control room. Typically, this monitoring is carried out by experts or alarm monitors under critical conditions. Meanwhile, one of...

A new computer program was developed to predict service life of polymer-reinforced concrete under fatigue-corrosion working conditions. In this way, polymer concrete is immersed in sea water (for a certain period of time). Then it is subjected to cyclic compressive loading. The magnitude of this loading can be either elastic or plastic in the defor...

Vibration measurement is one of the most efficient methods in detecting faults in rotating systems. To achieve this goal, anomalies in vibration data must be correctly detected. In this regard, there are various anomaly detection algorithms, but using all of them is not practical in the industry because the industry data is very complex and big dat...

The existence of a strong and regular maintenance program in large industries such as power plants plays a vital role in preventing significant and irreparable damages to the system. In this article, the authors tried to evaluate the accuracy of one of the well-known methods, i.e., One-Class Support Vector Machine (SVM) technique, in the field of i...

To tackle the complex challenges inherent in gas turbine fault diagnosis, this study uses powerful machine learning (ML) tools. For this purpose, an advanced Temporal Convolutional Network (TCN)–Autoencoder model was presented to detect anomalies in vibration data. By synergizing TCN capabilities and Multi-Head Attention (MHA) mechanisms, this mode...

The main purpose of this article is to investigate the static properties, e.g., ultimate tensile strength and elastic modulus, of polylactic acid samples that are made by 3D printing method. To this end, laboratory results of tensile tests were collected for different manufacturing parameters. Furthermore, various data-driven methods were used to m...

Symmetric data play an effective role in the risk assessment process, and, therefore, integrating symmetrical information using Failure Mode and Effects Analysis (FMEA) is essential in implementing projects with big data. This proactive approach helps to quickly identify risks and take measures to address them. However, this task is always time-con...

This study introduces an Enhanced Autoregressive Integrated Moving Average (E-ARIMA) model for anomaly detection in time-series data, using vibrations monitored by CA 202 accelerometers at the Kirkuk Gas Power Plant as a case study. The objective is to overcome the limitations of traditional ARIMA models in analyzing the non-linear and dynamic natu...

Kaplan turbines are widely used in low-water-head and large-capacity hydropower plants. The design of such systems is based on long-term performance. Nevertheless, many failures are reported in the industry, which lead to economic losses for the purpose of major repairs or replacement of a part of the system. Therefore, it is very important to know...

Slurry erosion is a serious issue and the primary concern for slurry handling machinery because it results in costly failures, downtime, and material replacement costs. Slurry particle sizes are one of the important characteristics that affect slurry erosion, including slurry qualities, service conditions, and material attributes. The present resea...

Presently, old gas turbines are used in the industry of some developing countries without high tech, which face many problems in the field of thermal efficiency and output power. Typically, turbines operate in the temperature range of 1200 to 1500 degrees Celsius. Many studies have been done to increase the efficiency of such systems. The results s...

The requirements for the quality and accuracy of manufactured products are constantly increasing. Reliability, durability, and accuracy of machine operation largely depend on the quality of surface treatment. Study on the cutting process, in particular milling, makes it possible to find out the operating conditions of the cutting tool, determine th...

Functionally Graded Materials (FGMs) are designed and ultimately manufactured for specific functions and applications. In this way, the properties of this new material are far better than the properties of each component alone. One of the most important capabilities of these advanced materials is to use them in the construction of spaceship walls a...

One of the most important goals of creating first-generation composite materials, i.e., polymer composite, has been to make a material with a high strength-to-density ratio compared to metals. However, this material cannot be used everywhere, especially in the space industry. Later, in order to improve the mechanical properties of composites, metal...

The present research estimates fatigue life of a type-IV CNG composite cylinder of a road automobile that serves as a super-acute part from a safety perspective. This component is subjected to cyclic internal pressure due to filling and emptying the cylinder. To this end, the mechanical and fatigue properties of different materials were determined...

A cheap, clean, and renewable source of energy is hydropower. Quick starting, stopping, and load changes are intrinsic capabilities of hydropower plants, providing operational flexibility and assisting in enhancing the reliability of the power system. On the other hand, the most effective option for addressing peak demand is hydroelectric plants. I...

The main purpose of this article is to know about the super-critical component (i.e., steering knuckle) of steering and suspension systems in a passenger car. In this regard, the material of knuckle and its geometry were discussed. In the following, the duties of this part in the car were studied. Finally, the appearance and functional signs of fai...

The main focus of this context is on the industrial application of the Resistance Spot Welding (RSW) in the manufacturing of the car body. After welding, different inspection methods, including Non-Destructive Tests (NDTs) and Destructive Tests (DTs) are used in the car body production line. Scientists and industrialists believe that RSW defects ca...

In this article, the authors tried to investigate various problems in the production of industrial parts by casting method, especially mechanical parts in automobile. At first, a list of all the parts in the car that are produced by casting method was prepared. Then, different casting methods were compared with each other and according to various f...

Wagon component failures that occur during service life can be reduced by applying appropriate geometric changes and using optimization techniques. Therefore, crucial changes are being studied to improve design and performance in structures such as connecting parts, braking systems, suspension, and transmission systems. The wing holders also have a...

The primary objective of this study is to assess the fatigue resistance of cement concrete when exposed to corrosive environments. To achieve this, experimental results from high-cycle fatigue (HCF) and low-cycle fatigue (LCF) tests conducted on cement concrete samples subjected to various corrosive conditions were used. Various data-driven techniq...

Large engineering structures made of various materials, including concrete (e.g., bridges, dams, buildings, and multilevel car parks), steel (e.g., power towers, ships, and wind turbines), or others, are often subjected to severe vibration, dynamic, and cyclic loads, which lead to crack initiation, crack growth, and finally structural failure. One...

Slurry erosion is a serious issue and the primary concern for slurry handling machinery because it results in costly failures, downtime, and material replacement costs. Slurry particle sizes are one of the important characteristics affect slurry erosion, including slurry qualities, service conditions, and material attributes. The present research a...

In the present study, the authors have attempted to present a novel approach for the prediction, analysis, and optimization of the Friction Stir Welding (FSW) process based on the Deep Neural Network (DNN) model. To obtain the DNN structure with high accuracy, the most focus has been on the number of hidden layers and the activation functions. The...

In this work, a new program named FVD-MBD (Full Vehicle Driving-Multi Body Dynamic) for extracting the time histories of the forces and moments on the vehicle components due to various road irregularities, such as urban asphalt, suburban asphalt, highway, dirt, rock, etc., as well as driving maneuvers like acceleration, braking, driving on a straig...

The first goal of the current study is to estimate the fatigue life of the middle steel piles of an integrated bridge installed in water and subject to the impact of sea waves. In the following, the authors have tried to improve the service life of this critical part of the bridge, which is also the main purpose of the study. To this end, conventio...

Welcome to the world of marine structures, as this fascinating compilation of cutting-edge research unfolds before your eyes. Prepare to dive deep into the fascinating realm of failure analysis, where mysteries are unraveled, and solutions emerge to repair and safeguard against future calamities [1]. This remarkable edition delves into a myriad of...

In this study, the authors first attempted to evaluate the efficiency of available systems for natural gas quality analysis using various examples. For this purpose, a model for such gas analysis systems was designed and the structural reliability of these systems were calculated. In the following , the main shortcomings of the existing methods for...

During the spot welding process, it is always possible to be made defects, and the most important reasons for defects can be due to incorrect settings of current, force, and time. In other words, at different time intervals depending on the working conditions of the welding machine (i.e., both manual and robotic machines), such as the erosion of th...

In the present study, the experimental data of a shot-peened (TiB + TiC)/Ti–6Al–4V composite with two volume fractions of 5 and 8% for TiB + TiC reinforcements were used to develop a neural network based on the deep learning technique. In this regard, the distributions of hardness and residual stresses through the depth of the materials as the prop...

In this paper, the authors have attempted to provide an empirical relationship between the fatigue behavior of three-sheet spot-welded joint and the chemical composition of low carbon steel. To this end, the application of this joint in the automotive industry was considered and laboratory samples were prepared based on the actual specifications in...

The new generation presented for CNG fuel tanks of vehicles (type-IV) is made entirely of composites. The reason for that is to prevent the sudden explosion of metal tanks and to use the advantage of gas leakage in composite materials. Previous research has shown that type-IV CNG fuel tanks also have challenges such as variable wall thickness in ou...

The authors presented a new methodology based on a Hybrid Multi Body Dynamics (MBD)-Finite Element (FE)-Data Mining (DM) techniques, namely H-MBD-FE-DM (in short HMFD). The obtained results show that by employing HMFD and adjusting the vehicle wheel angles by its prediction, the service time of the steering knuckle as the most critical part of the...

Kaplan turbines, as one of the well-known hydraulic turbines, are generally utilized worldwide for low-head and high-flow conditions. Any failure in each of the turbine components can result in long-term downtime and high repair costs. In a particular case, if other parts are damaged due to the impact of the broken blades (e.g., the main shaft of t...

Dear Colleagues, Mathematical modeling is often considered an art in formulating and solving equations rather than a science and is highly dependent on the experience and knowledge of the researchers involved. It requires both a good understanding of the nature of the process and familiarity with existing models and methods. In some practical case...

The main aim of this pre-research is to know the different aspects of cancer treatment by radiation therapy. For this purpose, a small team consisting of medical, technology, and engineering disciplines was gathered. After understanding the function of this treatment as well as the process of prescribing it for the patient and other factors, the fu...

This paper emphasizes the significance of Industrial Vibration Detection (IVD) techniques in improving the monitoring and maintenance of Combined Cycle Power Plants (CCPPs). Vibration has a significant impact on the performance of turbines and generators, resulting in increased maintenance, decreased efficiency, and catastrophic failure. The paper...

The primary purpose of this research is to determine the acceptable way of corrosion control of aluminum and its alloys. To this end, the authors have attempted to make a critical review on the techniques of corrosion control in different industries. The mechanism of aluminum corrosion was also described. Moreover, the effect of different corrosive...

In this paper milling operation of Al6061-T6 was performed in a dry condition. The effects of cutting parameters on cutting forces and moments in different directions and around various axes were studied. By applying Taguchi technique and performing experiments, it was shown that cutting force was significantly affected by feed rate followed by rot...

The current article examines the impact of bolt manufacturing methods on the performance of bolted fasteners. Moreover, the article also emphasizes the importance of considering the static and fatigue strength of bolts in bolted connection design. Therefore, the authors have attempted to compare the performance of bolts produced by different machin...

Cavitation in Kaplan turbines leads to flow instability, vibrations, surface damage, and reduce the machine performance. Therefore, this paper investigates the factors leading to cavitation in Kaplan turbine and presents practical solutions for it. Thermal-sprayed coatings are frequently applied due to their high wear resistance, cost effectiveness...

This article discusses the destructive phenomenon of fatigue in metals and its factors, such as surface roughness and cracks. The article highlights the importance of inducing Compressive Residual Stress (CRS) on the surface to prevent or delay fatigue failure. The most used technique for creating CRS is Shot Peening (SP) treatment involving throwi...

Kaplan turbines are widely used in low-water-head and large-capacity hydropower plants. The design of such systems is based on long-term performance. Nevertheless, many failures are reported in the industry, which lead to economic losses for the purpose of major repairs or replacement of a part of the system. Therefore, it is very important to know...

Journal of Design Against Fatigue, with an editorial board recognized in the field, is now accepting papers. First round decision in two months. No Article Publishing Charge until April 2024. Your accepted paper will be published online quickly and indexed by Google Scholar. https://lnkd.in/gze_d7yr

Magnesium is the eighth-most abundant element in the world and its alloys have a widespread application in various industries such as electronic and transport (i.e., air, land, and sea) engineering, due to their significant mechanical properties, excellent machinability, high strength to weight ratios, and low cost. Although monolithic Mg metal is...

Various classification of aluminum alloys is one of the most common applied materials in transportation industries due to the specific mechanical and material properties. Body of vehicles, including cars, ships, and airplanes, are constantly exposed to different cyclic loads that lead to surface damage and finally, fatigue failure occurs by crack g...

This article presents the static performance of composite steering knuckle due to drive on an equivalent road, including different types of roughness and maneuvers. To achieve this purpose, the driving of a full-vehicle model was simulated using the multi-body dynamics (MBD) method, and the imposed loads on connection points of the steering knuckle...

Petrochemical components, especially superheater internal parts, work under very harsh conditions and in destructive environments, such as proximity to the high temperature caused by the fire, surrounded by corrosive gases, effects of hydrogen released by burning gas or incomplete burning. All these factors along with loading factors and other dest...

This paper presents time-domain procedure to evaluate High-Cycle Fatigue (HCF) life of industrial components with complicated geometries and subjected to multi-input random loading conditions. To this end, the authors discuss some well-known equivalent stress criteria which can consider the orientation of critical plane changes with the time in non...

The main aim of the present study is to improve the High-Cycle Fatigue (HCF) life of automotive safety components subjected to multi-input random non-proportional loading. A case study was conducted on the automotive knuckle as one of the high-critical mechanical components of the suspension and steering systems. The steering knuckle is subjected t...

This research estimates the high-cycle fatigue (HCF) life of integrated concrete bridge installed on water due to temperature changes. To this end, CATIA software was used to geometrically model of a real-scale bridge. Next, thermal–structural coupling analysis was performed by finite element (FE) simulation in ANSYS WORKBENCH software. The compari...

One of the major challenges in the manufacturing parts, especially metals, is turning with good/excellent surface quality, which has a significant effect on the fatigue strength of the industrial components. Selecting incorrect or unsuitable values of machining parameters leads to vibration instability in the cutting tool and as a result, excessive...

For the safe and economical construction of embankment dams, the mechanical behaviour of the rockfill materials used in the dam's shell must be analyzed. The characterization of rockfill materials with specified shear strength is difficult and expensive due to the presence of particles greater than 500 mm in diameter. This work investigates the fea...

This study is provided in different parts, in which the first section introduces various types of oil storage tanks and their components. The second part looks at the common defects in oil storage tanks and their causes. The third part collects various topics, including design, construction, technical inspection, and repair standards. The next sect...

The main aim of the present research is to study vibration behavior of an integrated concrete bridge with H-shaped steel piles. To this end, the authors have attempted to obtain natural frequencies and shape modes of the structure by using modal analysis. Therefore, a real-scale bridge with full details were modeled in CATIA software. Next, finite...

In the design stage of construction projects, determining the soil permeability coefficient is one of the most important steps in assessing groundwater, infiltration, runoff, and drainage. In this study, various kernel-function-based Gaussian process regression models were developed to estimate the soil permeability coefficient, based on six input...

The flanged, barbell and rectangular squat reinforced concrete (RC) walls are broadly used in low-rise commercial and highway under and overpasses. The shear strength of squat walls is the major design consideration because of their smaller aspect ratio. Most of the current design codes or available published literature provide separate sets of she...

Reverse engineering is conducted based on the analysis of an already existing product. The results of such an analysis can be used to improve the functioning of the product or develop new organizational, economic, information technology, and other solutions that increase the efficiency of the entire business system, in particular 3D printed product...

A typical vehicle body contains many 3-sheet spot-welded connections with different sheet thicknesses. In addition, the use of dissimilar electrode geometries is extremely common in the automotive industry. These two factors lead to an asymmetric spot weld with asymmetric residual stress distribution and heat-affected zone. This asymmetry has consi...

The main aim of the present paper is to assess the fatigue lifetime of ductile cast iron knuckles as one of the critical components of an automotive steering system. To this end, a real driving path, including various maneuvers, such as acceleration, braking, cornering, and moving on various types of road roughness, was considered. Different load h...

In the present research, the authors have attempted to examine the compressive strength of conventional concrete, which is made using different aggregate sizes and geometries considering various curing temperatures. To this end, different aggregate geometries (rounded and angular) were utilized in various aggregate sizes (10, 20, and 30 mm) to prep...

In the present research, the authors have attempted to examine the compressive strength of conventional concrete, which is made using different aggregate sizes and geometries considering various curing temperatures. To this end, different aggregate geometries (rounded and angular) were utilized in various aggregate sizes (10, 20, and 30 mm) to prep...

The vibration phenomena which occur in rotary machines, such as power plants, can result in catastrophic consequences. Any failure in any power plant section can result in extended downtime and high repair expenses. Vibration is one of the most common causes of power plant failure. The above-mentioned issues can be avoided using high-accuracy vibra...

The main purpose of the present research is to investigate the shunting phenomenon in a three-sheet RSW joint using finite element simulation. To this end, a three-sheet resistance spot welding joint was simulated as an electrical-thermal-mechanical coupling problem. To validate the presented simulation, the finite element results were compared wit...

In this study, deep learning approach was utilized for fatigue behavior prediction, analysis, and optimization of the coated AISI 1045 mild carbon steel with galvanization, hardened chromium, and nickel materials with different thicknesses of 13 and 19 µm were used for coatings and afterward fatigue behavior of related specimens were achieved via r...

Bipolar Plates (BPPs) are the most crucial component of the Polymer Electrolyte Membrane (PEM) fuel cell system. To improve fuel cell stack performance and lifetime, corrosion resistance and Interfacial Contact Resistance (ICR) enhancement are two essential factors for metallic BPPs. One of the most effective methods to achieve this purpose is addi...

In the current research, the authors have attempted to improve the mechanical properties and creep behavior of the magnesium alloy Mg–9Al–1Zn (AZ91) in three different stress levels. To this end, the present study investigated experimentally the addition effects of different values of yttrium oxide nanoparticles to the AZ91. In this regard, weight...

The current research is conducted to investigate the experimental and numerical study of crushing behavior and buckling modes of thin-walled truncated conical shells with or without cutouts and discontinuities under axial loading. In this regard, Instron 8802 servohydraulic machine is used to perform the experiments. Additionally, the buckling mode...

In the present study, the authors attempted to predict the fatigue lifetime of a real-scale integral concrete bridge with H-shaped steel piles resulting from working and environmental conditions. In this regard, various types of nonproportional variable amplitude loads were applied on the bridge, such as temperature variations and sea waves clash....

Offshore platforms have had diverse applications in the marine industry, for example, oil or gas platforms can provide facilities to store the oil and gas before transporting those to refineries. Offshore wind turbines are another well-known use of the offshore platform for generating power. As platforms encounter various strong forces from water a...

In the present study, failure strength of the type-IV CNG fuel tank under burst pressure test in both constant and variable thicknesses was analized using finite element simulation. Afterward, optimal fiber twist angle was optimized to achieve maximum resistance to burst pressure in both models. To this end, the test specifications stated in NECE R...

The paper analyzes standard algorithms and software based on them to determine the optimal routes for cargo transfer in road transport systems. It was found that one of the urgent issues related to routing is to find a solution to the optimization problem by several efficiency criteria, including the reduction of computational procedures. As a resu...

Severe plastic deformation methods like shot peening (SP) are known as efficient surface treatments and grain refining processes which afford more effective properties in metallic materials. In the current research, a comprehensive study was carried out on SP of AISI 316 L steel. It included 42 different SP treatments with a wide range of Almen int...

Dear Colleagues, Marine structures are engineering facilities which are carefully designed, constructed, and installed in seaside zones/oceans for the exploitation of different marine resources. In general, these structures have three categories: fixed, mobile, and floating offshore platforms. However, they can be divided into different groups bas...

One of the remarkable phenomena in recent years is the growing trend of globalization. Iran is also seeking to join the World Trade Organization (WTO) to expand non-oil exports and presence in global markets, and is currently a member of the organization's oversight body. Handmade industries such as hand woven carpet are one of the important trades...