Theoretical Analysis Connected with the Strength of Fillet Welded Joint

Abstract

The present paper deals with the strength of fillet welded joint. Theoretical evaluation of the strength based on the theory of localized necking is presented and compared with the experimental results. In the theoretical analysis, Mises plastic potential and Henckys stress-strain relation are adopted. The theoretical results agree well with the test results.
The results obtained are as follows.
1) The yield strength of fillet welded joint can be evaluated with no regard for workhardcning of materials, but the maximum strength is affected by the rate of workhardening.
2) The yield strength is not affected by the size of the fillet weld, but the maximum strength decreases with an incresae of fillet size.
3) The yield strength and the maximum strength incresae with an increase of the fillet angle θf
4) The yield strength and the maximum strength are represented as a function of the penetration angle θp, and they increase with an increase of the penetration anlge θp.