The axial compressor considers the main component and plays a significant role in highspeed engines and it is subjected to different loads during the operations conditions. In this work, the simulation of the mechanical performance of the axial compressor under various loads was achieved. The simulation of the axial compressor (semi-open impeller type) was achieved with SOLIDWORKS 2016 while the structural numerical analysis was performed with ANSYS 2020 with three different materials which were (stainless steel, titanium, carbon fiber) to study the effect of different force values (5000, 10000, 15000) N on the mechanical performance of the axial compressor and to compare the behavior of modern material such as carbon fiber, which has been recently in the manufacturing of mechanical parts due to its significant properties like a high strengthweight ratio, with the other traditional materials. The output results were directional deformation, overall deformation, highest stress, highest shear stress and maximum strain. The results revealed that the carbon fiber showed the highest deformation more than the other two materials because of the type of failure that happened under loads such as delamination and cracks which may cause sudden failure for the compressor.

Gas turbine has been used in many modern applications such as electric power plants and airplane engines. Turbine propellers are usually under high load and high temperature therefore; it is necessary to study their behavior under loads before catastrophic failure. This work aims to investigate numerically the behavior of gas turbine propeller fabricated of three materials that were stainless steel, E-glass fiber and carbon fiber under various loads (2000, 4000, 6000) N to get the total deformation, maximum strain. Maximum stress and shear stress. The simulation was achieved using solidwork 2016 and the analysis was done using ANSYS 2020. The results showed that stainless steel showed less deformation than the other two materials.

No abstract

Resistance spot welding (RSW) is considered as predominant welding technique that is used in the manufacturing of modern automobile structure. The automobile structure is made of high strength steel which is preferred by the car industry companies due to its high strength-weight ratio. This work presents an optimization method for RSW of high-strength low-alloy steel DOCOL 500 LA. Tensile test and microstructure analysis for base material (BM) were carried out to get the mechanical properties of BM and to specify the rolling direction. Taguchi method, high efficiency technique, was applied using Minitab19 software to achieve the optimization process. Tensile shear test was carried out to evaluate the strength of welding nugget, absorbed energy and failure mode. The results showed that the optimum parameters were 8,800 A for the current, 30 cycles for the welding time and 2,230 N for the electrode force and two types of failure modes could be observed which were interfacial and full pullout mode.