MERGE_FAILURE_BOLT
Contact and tied interfaces
*MERGE_FAILURE_BOLT
mfid, $T_{fail}$, $S_{fail}$, $n_T$, $n_S$
mfid, $T_{fail}$, $S_{fail}$, $n_T$, $n_S$
Parameter definition
Variable
Description
mfid
Merge failure command ID
$T_{fail}$
Tensile failure force
$S_{fail}$
Shear failure force
$n_T$
Tensile failure exponent
$n_S$
Shear failure exponent
Description
This command specifies failure of a blind hole bolt MERGE interface. Failure is initiated when:
$\left( \frac{T}{T_{fail}} \right)^{n_T} + \left( \frac{S}{S_{fail}} \right)^{n_S} \geq 1$
where $T$ and $S$ are the total tensile and shear forces in the bolt-hole interface.
The command can also be used to predict failure of nut-bolt MERGE interfaces, but then only the tensile failure criterion will be active.
