The present work describes the structural analysis performed on a preloaded bolted joint configuration. The joint modeled was comprised of two L-shaped structures connected together using a single bolt. Each L-shaped structure involved a vertical flat segment (or shell wall) welded to a horizontal segment (or flange) and the structural shape under Uniaxial tension load , loaded at upper end and fixed support from other end, Steel bolted joint has been used. Experimental investigation was carried out on bolted joint to determine the influence of several factors on the bolted-joint response. The factors considered included bolt preloaded , washer-surface size, washer material(steel or brass) . Joint response is reported in terms of displacements, gap opening, and surface strains or stress by using strain gages technique to measure and to distribute strains on joint surface. The experimental results were compared with analytical results by using finite element structure analysis technique (F.E) i.e. using (ANSYS) program. Results have been presented that the maximum principle stresses by FEM analysis are less than actual stresses (≤10%). the strength of bolted joint increase by using hard steel washer 30mm . The standard preload 75% from proof strength for bolt material is the optimum value . Most of the factors studied were determined to have minimal effect; however, the washer surface size affected the response significantly.
Keywords: Flanged bolted joint , Finite Element Method , ANSYS.