In general, the interesting properties of real ropes are not well-modeled by simulation. Dirt, abrasion, water, stress concentrations, and other real factors will dramatically impact the results you get out in the real world. That's why these things are experimentally verified and ropes used in safety-critical applications (are supposed to) have huge safety margins, regular monitoring, and ideally regular replacement. Use the manufacturer numbers for real ropes.

But if you just want to simulate ropes, there's a few models out there from academics going "let's try and model this difficult system more accurately". Take a look at stuff like imc-der [0] and ridgerunner [1].

[0] https://github.com/QuantuMope/imc-der

[1] https://jasoncantarella.com/wordpress/software/ridgerunner/