Effect of dynamic loading on round eye slings
I’ve been looking for info on this but haven’t found anything quite discussing what I’m trying to find.
Is there any merit to the concern that dynamic shock-loading of a round sling (continuous polyester jacketed) can damage the core without apparent damage to the sling exterior that would be seen in routine inspection? I found some mfg guidance once that discussed de-rating round slings based on hook speed (ie they considered fast hook a dynamic loading scenario and called for I believe 50% de-rating), but not this specifically.
Ie if a sling has been used in a non-standard operating environment where it was subject to repeated heavy shock loads, but displays no apparent signs of damage, is the sling stiff safe to use? This question is entirely theoretical and I’m looking for a technical explanation, not ‘if in doubt throw it out’ which in real safety terms is probably the wise move.
thanks