Column Calculation
Column insertion stress, buckling, guide bushing, thread and lock bolt strength.
📊 Results
Max stress @ upper insertionMPa(120~150)
Max stress @ lower insertionMPa(120~150)
Bushing specific pressurekgf/cm²<25
Thread bending stressMPa<100
Thread crushing stressMPa<120
Lock bolt tensile stressMPa<100~120
Lock-bolt max loadkN
Lock-bolt mean stressMPa
Lock-bolt fatigue SF×≥1.2
Slenderness ratio λ—
Euler limit λ₁—
Critical buckling load / columnkN
Buckling safety factor×≥3.0
📌 Note
Column bears nominal force shared by n columns. Insertion σ = P/(n·A). Bushing p = P·e/H1 / (d·L), one-sided loading ×2. Lock bolt thrust = (0.15~0.18)·P.
Buckling: λ = H₁/i, i=d/4; λ₁=π√(E/σs). λ>λ₁ Euler Fcr=π²EI/(μH₁)²; else σcr=σs−σs·λ²/λ₁² and Fcr=σcr·A.
Lock bolt: Fpre=λ·Flock, Fmax=Fpre+C·Flock. σa=(σmax−σmin)/2. Goodman σa/σSa+σm/σs≤1.
🗺️ Schematic
Column / frame