A STUDY ON OCCURRENCE CONDITION OF BRITTLE FRACTURE AT BEAM END FLANGE BASED ON FRACTURE MECHANICS

-Application of cleavage fracture stress based on local fracture criterion-

Abstract

The cleavage fracture stress _pσ_c based on local fracture criterion is applied for evaluation index to grasp conditions of brittle fracture in previous studies[15]-[17].

In this paper, it is verified that the possibility of application of cleavage fracture stress to grasp conditions of brittle fracture of beam end flanges at beam to column joints which have complicated stress conditions. In conclusion, 1) _pσ_c is serviceable evaluation index to grasp conditions of brittle fracture of beam end flange. 2) Height of fillet=5mm detail is effective to buffer the stress and strain concentration around the scallop and the non-welded edge of submerged arc weld.