Static component strength
30.1
Eqn. 1
| Static component strength | σSK | = | MPa |
| Plastic Support Number | npl | = | ||||
| Yield strength | Rp 0,2 | = | MPa | |||
| Anisotropy factor | KA | = |
Calc 1
Static component strength89
The plastic support number npl > 1 enables the utilization of load-bearing reserves that a component has after exceeding the elastic limit load (onset of yielding at the critical point) up to the fully plastic load-bearing capacity.
A prerequisite for npl is a non-uniform stress distribution. npl is limited by reaching the fully plastic load capacity or the locally tolerable elongation.
For constant stress in the cross-section, npl = 1.
For ductile materials with a low fracture elongation A < 6%, npl = 1.
Rm [MPa] < 600 | Rm [MPa] > 600 ... < 900 | Rm [MPa] > 900 ... < 1200 | Rm [MPa] > 1200 | |
|---|---|---|---|---|
KA | 0.9 | 0.86 | 0.83 | 0.8 |
Tbl. 1 anisotropy factor steel | ||||
Applies to rolled & wrought steel materials. 89
89
Rennert, R. et al / Rechnerischer Festigkeitsnachweis für Maschinenbauteile / VDMA / Frankfurt / Main / 2012 / 6. Auflage