International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
ANALYSIS AND OPTIMIZATION OF STRUCTURAL INTEGRITY OF WELDED JOINT SANAP PRASAD S.[1], LAWANDE MAHESH B.[2], THORAT RAJENDRA R.[3], PATARE RUSHIKESH S.[4], PATHAN FARHAN A.[5] Student of B.E. Mechanical, G .H. Raisoni C.O.E.M., Chas, Ahmednagar[1],[2],[3],[4] Assistant professor, G. H. Raisoni C.O.E.M., Chas, Ahmednagar [5] ----------------------------------------------------------------***--------------------------------------------------------------2. FINITE ELEMENT ANALYSIS Abstract - Structural integrity includes tasks in many areas, such as failure analysis, structural analysis , nondestructive testing, corrosion, fatigue and creep analysis, metallurgy and materials, fracture mechanics, fatigue life assessment, development of repairing technologies, welding metallurgy, structural monitoring and instrumentation etc. Arc welding is a type of welding, in which the power supplies to create an electric arc between the base material to melt the metals at the welding zone and an electrode. The present analysis has been carried out on the welding parameters to achieve good quality of Arc welding. It has been explained in experiment, important of different welding parameters such as Different type of electrodes, Weld Current and Electrode Size on Mechanical properties of welded joint. Three dimensional FE model has been developed to simulate the arc welding process and validated by experimental results.
2.1. Thermo - Mechanical Analysis In the mechanical analysis, the basic equations are the geometric compatibility equations, equilibrium equations and constitutive stress–strain relations. The change in the temperature distribution contributes to the deformation of the body through influences the material properties and thermal strains.
2.2. Calculation for Temperature The temperature is being required for the Finite Element Analysis, so the temperature is calculated theoretically by using the formula of heat input. …….. (a) Where, Q m CP T
Keywords: Arc welding, Butt weld, Current, Electrodes, Structural integrity, etc.
1. INTRODUCTION Arc welding process is widely being used in industry for sheet joining purposes. There are wide applications of welding made of carbon steel such as Fencing or Railing done in Ghats, shipbuilding, bridge structure, pressure vessels etc. are subjected to various stresses such as compressive, tensile and thermal stresses etc. Structural integrity of large engineering structures gives a unique challenge in the production of safe and cost-effective means of analysis, rehabilitation and inspection Objectives of this research is to determine structural strength of welded structures, obtain results by FEA method and to obtain the good quality welding.
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= heat input = mass = specific heat = temperature ……… (b)
Where, I V T
= current (amp) = voltage (v) = time (sec)
………. From (a) & (b) ……….. (c) Hence, by using above formula eq. (c) the temperature for each plate is calculated to get the simulation in finite element analysis and temperature for each plate is as follows: Temp for E6013 Specimen
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