抄録
This paper deals with the stress concentration analysis of weld reinforcements under tensile load, and the optimum weld condition for decreasing the stress concentration factor (SCF).
SCF was systematically calculated using a numerical analysis with various geometrical parameters. The stress field induced by a distributed force on a segment in an infinite plate was used as a fundamental solution to solove this problem. In the calculated range of the geometrical parameters, SCF and the optimum weld condition were found to be as follows.
(1) SCF is almost constant when a flank angle θ is over 60°, when h/t is over 0.2, or when w/t is over 1.0; where h is the height of the reinforcement, w is the width of the reinforcement, t is the thickness of the plate.
(2) SCF is almost proportional to the square root of t/ρ, where ρ is the radius of the notch.
(3) In pulse arc welding, the best welding condition for decreasing SCF is the one to controll θ except ρ.
