Abstract
Owing to the good mechanical properties of braided structures, regular braided ropes are increasingly being used in various fields, including marine exploration, aloft work, recreation activities, and oil prospecting. However, under certain severe conditions, they could break, a situation that is absolutely undesired. Thus, predicting their stress distribution and strain-force characteristics when they are subjected to different tensile loads is a pre-requisite for their application. Therefore, in this study, a mathematical model for ropes with regular braided structures is developed, and based on the model, this study reveals that uneven stress distributions in the different strands of regular braided ropes generate different stress distributions and strain-force characteristics in each of the strands. Additionally, the uneven stress distributions in the different strands also induce mechanical failure more readily. Finally, to ensure the reliability of braided ropes in different applications, different strand parameters are compared.
Highlights
Rope braiding possibly dates as far back as 28,000 years ago
Even though each basic structure consists of four basic units, only two different types of stress distributions are identified in counter-clockwise and clockwise strands
By dividing ropes into basic loops consisting of four different units, a regular-braided rope mathematical model that can be applied to mono-filaments is proposed
Summary
Rope braiding possibly dates as far back as 28,000 years ago. Two sets of braiding strands are each moved in the clockwise and counterclockwise directions such that they interlace with each other.[1] Three types of braided structures exist, these are: diamond, regular, and Hercules braided structures. Most common are regular braided structures, which can be produced with circular braiding machines.[2] Even though they are simple, the tensile properties and internal stress characteristics of their constituent strands are not. The degree of complexity exhibited depends on the specific architecture of the braiding strands as well as many other braiding parameters
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