Today, conventional machining with chip or machining without chip machining manufacturing methods is used to bring to the desired dimensions sizes the machines and equipment used in the industry. However, non-traditional manufacturing methods are used in cases where traditional machining manufacturing methods are inadequate. Cutting with water jet which is one of the non-traditional manufacturing methods is commonly used in several fields of industry. Unlike traditional manufacturing methods such as turning and milling, not using of a physical cutting tool is among the advantages of the method. Abrasive water jet manufacturing method was started to be applied by adding abrasive particles in the water jet. Apart from the superior properties of the method, possible damages occur in the water jet nozzle due to processes such as cutting or drilling by applying high pressure. Erosion-corrosion is the leading damage among these damages. In this study, the erosion-corrosion in the nozzle caused by high-pressure water and abrasive during the abrasive water jet cutting process was simulated in the computer environment. In this paper, the erosion rate in the nozzle was calculated as 6,90E-06[Formula: see text]kg/m2[Formula: see text]s. This value was converted as 0,30[Formula: see text]mm (27,09[Formula: see text]mm for yearly) via developed software for 100[Formula: see text]h.

In this study, corrosion behaviors of materials used in diffusion units and equipment used in juice clarification steps and tubes in evaporators at Ankara Sugar Factory were investigated in terms of juice production and juice clarification processes as well as juice medium at evaporation stages. The measurements have been performed by comparing steel types used in these units and alternative types of steels that can also be used during the study. For this purpose, pH and Brix (Bx, refractometric dry matter) values of raw juice, thin juice and juice taken from evaporator have been measured during 2009-2010, 2010-2011, and 2011-2012 campaign periods of Ankara Sugar Factory. In addition to these measurements, traditional weight loss and electrochemical tests such as Linear Polarization Resistance (LP), Tafel Extrapolation (TP), Electrochemical Impedance Spectroscopy (EIS) were performed to measure and compare the corrosion rate of the metals used in different juice mediums. The metals included in the study were AISI 316L, AISI 304L grade stainless steel, St 37.2 grade carbon steel and nickel-coated St 37.2. The highest and the lowest corrosion rates were recorded for raw juice and thin juice, respectively. St 37.2 steel had the fastest corrosion rate, whereas the stainless steel AISI 316L has the slowest corrosion rate. However, AISI 316L shows only slightly higher corrosion resistance compared to the corrosion resistance of AISI 304L in different juices. Therefore, AISI 304L steel, which is cheaper than AISI 316L, can be selected as a substation of St 37.2 steel.

In this study, the reason for erosion-corrosion of drinking or mains water in the faucet was investigated by computational fluid dynamics. Pipes used in homes, the service sector, and industry are responsible for transporting different types of fluids from one place to another. Considering the faucet design, the SolidWorks program was used for 3D studies. In-faucet flow analyses were performed using Ansys Fluent, a computational fluid dynamics program based on the finite volume method. In the analyses, lime particles were chosen. At the end of the analysis, the amount of erosion in the faucet was obtained.

Viruses are the leading infectious diseases. Viruses spread very fast and has a mortal risk to people with chronic diseases. Different methods are being sought to protect against the virus. In this study, the effect of face mask used against Covid-19 and other infections were investigated using finite element analysis. The effects of droplets formed because of cough or sneezing on the masked and without masked human model were analyzed. The human model without mask has a negative effective on the human face. The risk of infection is higher on the unmasked human model than on the masked human model.

In this study, a new Kirschner wire (K-wire) design was performed to fix bone fractures in orthopedic surgery. The numerical analyses were completed based on the finite element method (FEM), using Deform-3D software. In this kind of numerical analyses using the FEM, friction, material model, the load and boundary conditions must be defined correctly. It has been seen that the new design is more advantageous in terms of implant failure or stability of fracture fixation. In addition, a good compatibility was found between the experimental results and the finite element analysis (FEA) results. This confirmed the accuracy of the finite element model. Therefore, this finite element model can be used reliably in drilling processes. We believe that with the use of new design investigated may have the role on the patients taking away from recurrent anesthesia and orthopaedic surgical risk.