Crimson Publishers-Mechanical Engineering

 Influence of Abrasive Water Jet Turning Operating Parameters on Surface Roughness of ABS and PLA 3D Printed Parts Materials by Fuat Kartal* in Crimson Publishers Abstract In this study, PLA and ABS materials produced by 3D printing with 14mm diameter and 300mm length were processed by turning with abrasive water jet machining. The effect of processing parameters with abrasive water jet on the surface roughness was investigated. The processing parameters are nozzle feed rate (60-210mm/min), abrasive flow rate (150-225g/min), chuck turning speed and nozzle distance. Experimental studies have shown that the increase in nozzle feed rate (from 50 to 200mm/min), abrasive flow rate (from 150 to 225g/min) and nozzle distance (from 3 to 9mm) results in average surface roughness values increased by 26%, 35% and 19%, respectively. It was concluded that the increase in the rotation speed of the mirror (from 75RPM to 225RPM) resulted in a 17% decrease. https://crimsonpublishers.com/eme/pd...

 Brief Review of the Evolution and Nature of the Universe by Leonard S Kisslinger* in Crimson Publishers Abstract: First there is a review of the Cosmic Microwave Background (CMBR) estimate of ordinary matter, dark matter and dark energy in the universe. Then there is a review of the evolution of the universe with two important cosmological events reviewed. https://crimsonpublishers.com/eme/pdf/EME.000591.pdf For More open access journals in  Crimson Publishers please click on link:  https://crimsonpublishers.com

 Overview on Reverse Engineering by Amit Rakshit* in Crimson Publishers Opinion: Reverse engineering sometimes known as a back engineering which is a process in which machines, aircraft, architectural structures and additional goods are deconstructed to extract design information from them. Reverse engineering involves deconstructing human being components of larger products. Reverse engineering process enables you to settle on how a part was designed so that you can restructure it. Companies over and over again use this move towards when purchasing a replacement part from an original equipment manufacturer is not an alternative. The reverse engineering process is named as such because it involves working backward through the original design process. Therefore, the confront is to gain a working knowledge of the original design. https://crimsonpublishers.com/eme/pdf/EME.000590.pdf For More open access journals in  Crimson Publishers please click on link:  https://crim...

 Seismic Resistance of Turbine Equipment of Powerful Nuclear Power Plants by Serhii Palkov* and Ihor Palkov in Crimson Publishers Abstract: The paper considers the methods of the design analysis of the seismic resistance for the components of operating nuclear power plants in at three-dimensional setting using the finite element method. An algorithm to confirm the seismic resistance of equipment by a calculation method is proposed, and the limits of its application are determined. A mathematical model of the equipment is developed, and an example of the determination of natural frequencies and stresses for a three-dimensional structure is given. Two main types of calculation were used–static and dynamic. The seismic resistance of the equipment was estimated on the example of the K-1000-60/1500 steam turbine condenser and calculated at a seismic intensity of 6 points on the MSK-64 seismic intensity scale. In the course of solving this problem, results of the stress distribution...