Many methods exist for bringing together similar or dissimilar structural materials, in terms of the joining technique utilized. Conventional mechanical joints, such as bolted, pinned or riveted are preferred due to their simplicity and the dis-assembly ability that they offer for joining metal or composite materials. However, when a mechanical joint is loaded, local damage is induced at the fastener holes due to stress concentrations. This fact leads to the structural degradation of a joint and jeopardizes the structural integrity of the assembly structure. Many methods exist for bringing together similar or dissimilar structural materials, in terms of the joining technique utilized. Conventional mechanical joints, such as bolted, pinned or riveted are preferred due to their simplicity and the dis-assembly ability that they offer for joining metal or composite materials. However, when a mechanical joint is loaded, local damage is induced at the fastener holes due to stress concentrations. This fact leads to the structural degradation of a joint and jeopardizes the structural integrity of the assembly structure. Threaded bolts are widely used in engineering to hold two or more parts together. The failure of the threaded bolts can lead to the catastrophic failure of the structures. Determination of ultimate bearing load and prediction of damage evolution for threaded bolt are critical to evaluate the integrity and safety of most engineering systems. The design of bolted joints is heavily based on experiments now a day’s most studies have been focused on the ultimate bearing strength of the bolted joints. Investigated the bearing strength and failure process for double lap bolted joints under a static tensile load. Showed that the bearing strength of the bolted joint is largely depending on the clamping force. Improved numerical analysis methods are needed to reduce the expensive and time-consuming experiments.