The Fracture Mechanic On The Spot Welded Joint

Hamzah , Syamsulrizal (2009) The Fracture Mechanic On The Spot Welded Joint. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

My Projek Sarjana Muda (PSM) is regarding a study and analyze problem those related the fracture mechanic on the spot welded joint. This project enables me to collect all the relevant information about spot welded concept and the application of spot welded. This study presents the fracture of the spot weld, sheets thickness and stresses on the the spot-weld joints to predict the maximum stress and location of the weakest spot-welds at the specimen of spot welded joint. A simple model was used to illustrate the technique of spot-weld stress analysis. Finite element model and analysis were carried out utilizing the finite element analysis commercial codes. MSC nastran patran analysis was carried out to predict the stress state along the weld direction. It can be seen from the results that the predicted life greatly influence the sheet thickness, nugget diameter and loading conditions of the model. Acquired results were shown the predicted life for the nugget and the two sheets around the circumference of the spot-weld at which angle the worst damage occurs. The spotwelding fracture analysis techniques are awfully essential for automotive structure design.

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