Stress Concentration Factors for Simple Tubular K Joints

In plane bending on one brace only

K image
$$ \beta = \frac{d}{D} $$
$$ \alpha = \frac{2L}{D} $$
$$ \gamma = \frac{D}{2T} $$
$$ \tau = \frac{t}{T} $$
Location Equation Short chord correction
Chord crown $1.45 \beta \tau^{0.85}\gamma^{1-0.68 \beta}\left(\sin\left(\theta\right)\right)^{0.7}$ None
Brace crown $1+0.65 \beta \tau^{0.4}\gamma^{1.09-0.77\beta}\left(\sin\left(\theta\right)\right)^{0.06\gamma-1.16}$ None

Note that all geometric parameters and the resulting SCF’s relate to the loaded brace.