arresting cable 2

JACEK1

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Hello

Based on the same fragment as the one that was posted a few minutes ago, I would like to ask you another question about the arresting cable.

Does abrasion testing of an arresting cable really consist in using test panels in order to cut a new 3-mm (l / 8-inch) diameter, 300 mm (12-inch) long cold-rolled steel rod? In my opinion, the steel rod is the arresting cable.

What do you think?

4.6.1 Abrasion of arresting cable (composition L only). Three 250 by 150 by 3 mm (10 by 6 by 1/8 inch) test panels should be prepared as specified in 4.5.3. Each panel shall be conditioned by running 50 cycles in the cable abrasion tester stated herein before the determination of the abrasion of the arresting cable. Each panel will be used to cut a new 3-mm (l / 8-inch) diameter, 300 mm (12-inch) long cold-rolled steel rod. The diameter of each rod shall be measured before the nearest 0.0025 mm (0.1 mil) in this place which will come in contact with the test panel. The rod shall be held in a jig in the test apparatus as shown on figure 1. After completion of the 200 cycles in the abrasion machine, the rod shall be removed from the jig and the diameter of the rod shall be measured to the nearest 0.0025 mm (1 roil) in the same ten places. The difference in thickness in each of the places shall be computed. The wear of each rod shall be the average of these values. The average of the wear of the three rods should be computed, and this value shall be used to determine conformance.

Thank you.
 
J

J&K Tutoring

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My reading of your two posts about arresting cable is that the cable is being tested to see how it will wear as it is dragged repeatedly across the carrier deck. Testing a full cable introduces extra variables, so individual strands are tested. To represent field conditions, bits of steel, painted with the deck paint, are used to rub the test rods. It is confusing that they used the word "cut", but further reading indicates they are not expecting the rods to be completely severed- they should only get (slightly) smaller.
 

JACEK1

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Maybe they should have used "wear out" instead.
 
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