International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 02 | Feb -2017
p-ISSN: 2395-0072
www.irjet.net
THICKNESS OPTIMIZATION OF THICK WALLED CIRCULAR CYLINDER BY HEAT TREATMENT AJAY VIJAY PATIL1, Dr M. A. KAMOJI2 1M.Tech
Student(Design Engineering), KLE. Dr. M.S Sheshgiri College of Engineering and Technology, Belgaum, Karnataka, India 2Professor, Department of Mechanical Engineering, KLE. Dr. M.S Sheshgiri College of Engineering and Technology, Belgaum, Karnataka, India
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Abstract - The hydraulic cylinder are used in chemical
industry, military and nuclear power plants, petroleum industries and heavy equipment structures. The cylinder (without heat treatment) is subjected to internal pressure and the internal pressure is incremented in terms of 10MPa till stress equals yield point stress. The thickness of cylinder is determined by using Lame’s equation. Further cylinder is subjected to internal pressures in ANSYS APDL 12.0.v. The ANSYS results are compared with analytical results having percentage error less than 2%. The cylinder (with heat treatment) is subjected to internal pressures in ANSYS and pressures are increment in 10MPa till stresses equal yield point stress. The ANSYS results of cylinder (with heat treatment) are compared with ANSYS results of cylinder (without heat treatment). Further the thickness is reduced by 5mm and subjected to internal pressures, the pressure is incremented in 10MPa in ANSYS. The results obtained are compared with cylinder (without heat treatment). Further cylinder (with heat treatment) with thickness reduced is subjected to modal analysis (analytically and numerical). The analytical natural frequencies are compared with numerical natural frequencies with percentage error less than 3%. The working frequencies obtained and compared with analytical and numerical frequencies, the working frequencies are very low hence there is no resonance condition. Key words:- Single acting cylinder, heat treatment, Thickness, Mechanical vibrations etc
loading conditions. The figure 1 shows the single acting hydraulic cylinder.
Fig -1: Single acting cylinder The numbers of theories for prediction of natural frequencies are developed for cylinders. The working conditions of cylinder have different natural frequency according to their usage fields. The large size cylinders require higher force and moment inputs, work generally in lower frequencies and small size cylinder used in sensitive applications fields like testing and measurements systems have higher working frequencies. To study the effect of thickness reduced on heat treated cylinder.
1.1 Heat Treatment on Cylinder Hardening heat treatment [8] is carried on steels to improve mechanical properties and ductility. The carbon content in medium carbon steel is 45%. Heat treatment is based on iron carbon diagram and heat treated temperature ranges are 8000C to 8500C. The improved yield strength is 490MPa and hardness 235HB. The figure 2 shows the iron carbon diagram.
1. INTRODUCTION The main component of hydraulic system is the cylinder and cylinders are widely used in petroleum, chemical industries and heavy construction equipments. The cylinder is called thick walled when the ratio of bore diameter to thickness is less than 10. Thick walled cylinders are subjected to high internal pressures which may be cyclic or constant loading condition. The conventional elastic analysis of cylinder subjected to internal pressure is carried out. In order to make full use of loading conditions the radial and hoop stress should be within yield strength of material and ensure safety at such Š 2017, IRJET
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Impact Factor value: 5.181
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Fig -2: Heat treating temperatures for carbon steels ISO 9001:2008 Certified Journal
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