表面切欠を有する厚板の溶接接合部の破断延性に関する研究

概要

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This study conducts a tensile test and elastoplastic analysis of surface-notched welded joints composed of thick plate to evaluate the fracture ductility by the fracture criteria of crack opening displacement (COD). Eight test specimens were prepared. Experimental parameters are notch width, notch depth and notch position. COD and overall strain were measured as deformation properties. Critical fracture value (δ_c) increases as the equivalent through-thickness notch size (a_<eq>) increases. However, δ_c is smaller for specimens with surface notch than for those with side notches. The relationships between the COD which is non-dimensionlized by a_<eq> and overall strain(ε_∞) can be approximately expressed in one formula. Using the gradient of the straight line thus obtained, fracture ductility of welded joints is evaluated.
一般社団法人日本建築学会の論文
1993-03-20