Steel wire cables - zip line cable and via ferrata cable

 In my test series with cyclic bending I tested two types of wire cable:

1. compressed 12 mm zip line cable

2. 15 mm via ferrata cable.

Here are the results:

12 mm Zip Line Cable (compressed)

It is comparable with the 10 mm 7x19 cable (wire core). Under similar bending angle they react similar.

 

 

The breaking load after 1000 cycles (33 kN) is about 1/4 of the normal breaking load.

 In the video you see this chart:

 

It shows a principle: For a long time nothing happens, but once a damage occours the detoriation grows rapidly.

15 mm Via ferrata Cable

 This cable was a big surprise. It has a fiber core. And it reacts similar to the 10 mm fiber core cable. After 3000 cycles both cables had similar (severe) damage.

The breaking load after 300 cycles was very low with 13 kN.