Optimalization of combined weld and bolt connection to increase tensile strength of plate

The research objective to be achieved is to analyze the influence of strong currents (100, 120, 140, 160) Ampere, the model position number (2, 3, 4) bolt in the direction of the weld longitudinal and transverse as well as determine the best model of weld and bolt connection combination as an effort to increase tensile strength plate. The method used is to form specimens of welded connections (longitudinal and transverse) with various types of bolt position model. The manufacturing process produces a connection position 2 bolts model (Horizontal, Vertical, Slant A and Slant B), and the position of 3 bolts with the model (ΔA, ΔB, ΔC and ΔD) and position 4 bolts with the model (Square, rhombus, parallelogram A and parallelogram B). Welding treatment is done through a longitudinal direction, transverse direction and combinations (Longitudinal + transversal) with vary of strong currents. The testing process of tensile test produces output value of load, extension, tensile strain, maximum tensile and the time used. The phenomenon of the test results showedthe best the connection of weld and bolt combination. Results of tensile test results in improved strength through the addition of a (2, 3, 4) bolt from the various models and position 4 bolts models parallelogram Bhas the highest tensile strength of and weld connection combination direction (Longitudinal + transversal) with a strong current of 120 Amperes has highest tensile strength of and connection combinations of welding direction transversal to position of 3 bolts models triangleD in a strong current of 140 Ampere has the highest tensile strength values of compared to the 2 bolts models of slant A of and position for 4 bolt model parallelogramB of .Position 3 bolts models triangle D in weld connection combination direction transverse with a strong current of 140 Ampere showed the value of the highest maximum tensile strength as a results of tensile test and the best connection.