ISSN: 2319-8753 International Journal of Innovative Research in Science, Engineering and Technology (An ISO 3297: 2007 Certified Organization) Vol. 3, Issue 8, August 2014 DOI: 10.15680/IJIRSET.2014.0308026 Copyright to IJIRSET www.ijirset.com 15252 Study of Stresses and Loads on Double Shear Lug Joint By Varying Material Combinations B.Vijaya Kumar 1 , F.Anand Raju 2 , S.Sunil Kumar Reddy 3 PG Student, Department of Mechanical Engineering, SITEK, Puttur, Andhra Pradesh, India 1 . Professor, Department of Mechanical Engineering, SITEK, Puttur, Andhra Pradesh,India 2 . Head of Department, Department of Mechanical Engineering, SITEK, Puttur, Andhra Pradesh, India 3 . ABSTRACT: Attachment lug joints are commonly used in aerospace and mechanical structures. Lug joints are generally used to connect major structure components for transfer of loads and they often subjected to repeated load spectra. Lug and pin joints have been designed based on theoretical strength of materials models. In this study, geometry was determined and analysed using theoretical Strength of material calculations. The ultimate loads and allowable stresses by using different materials (Inconel718, Waspaloy, Stellite6, 2024T351 plate, 7075T651 plate, Mg Bronze, 4130 steel) in the current lug joint geometry are caliculated by strength of material calculations. From calculations we determined the allowable limiting loads for those different materials in the double shear lug joint. It is suggested the highest allowable limiting load of a double shear lug joint by using different materials in the geometry under allowable stresses. KEYWORDS: Lug joint, limiting load, Inconel718, Waspaloy, Stellite6, 2024T351 plate, 7075T651 plate, Mg Bronze, 4130 steel. I. INTRODUCTION Lugs are connector type elements used as structural supports for pin connections. Prior to the 1950’s, lugs were overdesigned as weight and space were not design driving factors. With the tightening of weight, cost, and space requirements in the aerospace industry, a more precise method of lug analysis was required. Early aerospace lug analysis, developed in the 1950’s at Lockheed Aircraft Corporation by F.P. Cozzone, M.A... Melcon, and F.M Hoblit and summarized in Reference 2 and 3, addressed prior anticonservative assumptions, such as incomplete evaluation of the effect of stress concentration and pin adequacy with respect to bending. This work provided to analyse axial and transverse components for various material combinations of Inconel718, Waspaloy, Stellite6, 2024T351 plate, 7075T651 plate, Mg Bronze, 4130 steel in lug-link-bush-pin geometry to determined bearing stress &bearing load of lug joints ,bush bearing stress and bush bearing load ,shear stress , bending stress and bending load of pin .By considering all allowable loads in the lug-link-bush-pin geometry, hence predicted the allowable limiting of lug-link- bush-pin for different material combinations. From the predicted allowable limiting loads for different material combinations in lug-link-bush-pin geometry, choosing the maximum allowable limiting load combination to bear the loads without failure in the geometry