Stress Distributions in Brazed Single-Lap Joints Under Tensile Loading

Abstract The most common method for characterizing the strength of brazed joints is uniaxial tension testing single lap (SLJs). Standard interpretations depend on assumption that average shear stress at failure key metric in determining joint strength. However, it evident from geometry distributions must be inhomogeneous with lag type concentrations ends overlap regions. Eccentric loading causes rotation and bending stresses amplify result geometric nonlinearity. Unfortunately, details normal braze needed to understand have not been presented. Thus, finite element analysis was used quantify these using 2D elastic elasto-plastic models monolithic stainless steel SLJs. Bending acting were determined over a wide range ratios applied stresses. For all conditions, are highly concentrated narrow region peak exceeding Variations ratio found fully explain experimental data. Common based incorrect. Implications testing, interpretation, design discussed.