Stress cross sections of metric threads
27.4
The stress area of a screw connection is calculated from the nominal diameter D of the bolt, the pitch P of the thread and the number of bolts.85
Eqn. 1
| Stress area | AS | = | mm2 |
| Number | n | = | ||||
| Nominal diameter | d | = | mm | |||
| Pitch | P | = | mm |
Calc 1
Stress area AS for threads
Example I The calculated stress area must be greater than 111 mm 2. This is achieved using 2 bolts with a nominal diameter of M10 and a pitch of 1.25 mm.
Example II The calculated stress area must be greater than 111 mm 2. This is achieved using 3 bolts with a nominal diameter of M8 and a pitch of 1 mm.
Fig. 1
Nominal diameters, pitches for metric threads and associated stress cross sections
85
… / Tabellenbuch Metall / Europa Lehrmittel / … / 1994 / 39. Auflage