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Inspecting Standing Rigging
noexpert wrote:
Are solid stainless steel rods any less vulnerable? What alloy is used for major standing rigging; there must be some less prone to chloride/stress attack, or? I worked with some higher than 316 plus extra titanium alloy(32?) for seawater boiler; it was a much better choice than regular 316. I am not sure if this alloy is being offered in steel rope shape. Any one knows more about it? thanks Just a suspicion, but it seems to me that the problem here is a result of the swaging process itself. When the swage is squeezed, there should be uneven compression which would cause the material to yield unevenly - leading to rather high localized stress concentrations. In-service vibration, over time, should lead to exactly the kind of cracks described by GBM. FWIW, for highly stressed aircraft cables, the terminals (ends) are *Rolled* rather than squoze... Richard |
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