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Proper Modeling for Expansion Joint in C2
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howmansito
Petroleum
THERE IS ANY WAY TO CALCULATE THE BENDING STIFF OR THE TORSION STIFF (IN.LB/DEG) OF A RUBBER EXPANSION JOINT???, IN CATALOGS ONLY SHOWS ALLOWABLE MOVEMENTS (IN or DEG), GENERAL SPRING RATE (LB/IN), AXIAL SPRING RATE (LB/IN) AND ROTATIONAL SPRING RATE (LB/DEG), THANKS REGARD.
The simple answer to your question is, there is no way.
The only realstic route to obtain proper results for a typicl rubber EJ would be with a calibrated test rig.
There are many reasons for this, for example, the longitudinal rotational spring rate of this kind of EJ is a fuction of axial compression. It is not a constant value as would be found in a metallic unit.
However, in most cases, for the normal range of imposed movements, the forces and moments developed by a rubber EJ are so small as to be insignificant.
The only realstic route to obtain proper results for a typicl rubber EJ would be with a calibrated test rig.
There are many reasons for this, for example, the longitudinal rotational spring rate of this kind of EJ is a fuction of axial compression. It is not a constant value as would be found in a metallic unit.
However, in most cases, for the normal range of imposed movements, the forces and moments developed by a rubber EJ are so small as to be insignificant.
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