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- W2910267546 abstract "Predicting the service life of high-strength fiber ropes in CBOS (cyclic bend-over-sheave) fatigue has been the subject of many recent studies. Accurate lifetime prediction is critical to reduce risk of premature failure and to maximize the economic benefit of these advanced materials. Many predictive formulas have been developed for specific rope materials and/or designs, based on curve fits to large data sets. However, in too many cases, little work is done to tie the curve fit parameters to physical phenomenon. Alternatively, it is also possible to develop predictive parameters based on rope and sheave physical interactions. One simple first-order damage parameter that has been described previously is the NSP or Normalized Sheave Pressure. This factor, a combination of rope tension T and sheaveto-rope diameter ratio D:d, has proven useful in rough scaling exercises, e.g. estimating the influence of sheave diameter and load over a limited range. However, careful experimental studies on small diameter ropes have shown this model to be a scaling approximation at best.Many fiber ropes fail in CBOS primarily through progressive abrasion wear between and among fibers. The present study proposes a damage parameter to model these ropes specifically, developed using simple abrasion assumptions. Damage is modeled as a product of pressure and movement, with individual pressure terms combined after separate analysis, e.g. internal pressure, external pressure, etc. The resulting damage parameter is similar to the NSP, with additional terms involving D:d. The new parameter is shown to more closely correlate with existing experimental data at two different sheave sizes. A major limitation of the model is reliance on experimentally derived constants. The goal of further model development is to minimize the use of such constants, to better understand the physical mechanisms of damage development and ultimate failure. Further limitations of the model are discussed, and suggestions for additional study are presented." @default.
- W2910267546 created "2019-01-25" @default.
- W2910267546 creator A5022837157 @default.
- W2910267546 date "2018-10-01" @default.
- W2910267546 modified "2023-09-26" @default.
- W2910267546 title "Predictive Damage Parameter for Fiber Ropes in CBOS Fatigue" @default.
- W2910267546 cites W2013238681 @default.
- W2910267546 cites W2125103813 @default.
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- W2910267546 doi "https://doi.org/10.1109/oceans.2018.8604698" @default.
- W2910267546 hasPublicationYear "2018" @default.
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