We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
The effects of mechanical degradation on the quasi static and dynamic stiffness of polyester yarns
Summary
Researchers examined how different levels of mechanical degradation affect the quasi-static and dynamic stiffness of polyester yarns used in offshore mooring ropes, providing data to better predict performance and failure of these critical marine structures.
Polyester fibers are the most used in the manufacture of ropes for mooring systems and offshore operation, thus being constantly subjected to different situations. Such requests are implicated in a variety of load conditions, and their effects must be studied. This work presents data referring to an experimental study on the behavior of the quasi-static and dynamic stiffness of polyester yarns considering different mechanical levels of degradation and use. The study is performed with five different types of multifilament samples, these were extracted from a virgin spool and sub-ropes tested for tension and fatigue. The experimental procedure is carried out through an initial characterization where the linear density, the Yarn Break Load - YBL and the linear tenacity of the samples are determined. Continuing with the experimental tests, a procedure standardized by ISO 18962-2 is then carried out, consisting of three quasi-static stages and three dynamic stages, where the data acquired in the tests allow the determination of a dimensionless stiffness value. The results showed an increase in the quasi-static stiffness, tending to a plateau, and a linear increase in the dynamic stiffness, but with somewhat similar behavior between the samples. The results related to the total quasi-static stiffness also show that the specimens extracted from sub-ropes that underwent fatigue present greater total non-dimensionalized stiffness, this is indicative of the mechanical fatigue procedure as an improvement of the specimens, giving them greater stiffness, and consequently greater stresses rupture, a behavior that should be explored in future studies.
Sign in to start a discussion.
More Papers Like This
Changes in Mechanical Properties of Fabrics Made of Standard and Recycled Polyester Yarns Due to Aging
This study compared how standard and recycled polyester fabrics age mechanically, finding that recycled polyester performs comparably to virgin polyester without developing additional surface cracking that could increase fiber shedding. Knowing whether recycled synthetic textiles shed more or fewer microplastic fibers during use and washing is important for evaluating the environmental trade-offs of textile recycling programs.
A quantitative residual stiffness model for carbon fiber reinforced polymer tendons
Not relevant to microplastics — this engineering study models residual stiffness degradation in carbon fiber-reinforced polymer tendons under fatigue loading, relevant to civil infrastructure but with no connection to microplastic research.
Influence of Aging on the Physical Properties of Knitted Polymeric Materials
Researchers exposed knitted polyester fabrics made from both conventional and recycled yarns to natural weathering and measured changes in their physical properties. They found that aging reduced fabric thickness, strength, and stretch, with recycled materials showing the largest decreases in strength and elongation. The findings suggest that as synthetic clothing wears down over time, it may release more microfibers into the environment.
Alternative Rope Materials in Towed Fishing Gear to Reduce Plastic Waste, A Comparative Study of Mechanical Properties and Tolerance Against Wear and Tear
Researchers compared the wear tolerance of 14 different rope materials in demersal fisheries, including conventional synthetic polymers and biodegradable alternatives, to identify lower-plastic options that can reduce fishing gear-derived plastic waste.
Image-based finite element modelling of fibre dynamics in polyester staple spun yarns
Researchers built a detailed computer model of how individual fibers move and stress inside a polyester yarn, using X-ray imaging to capture the yarn's actual 3D structure. Beyond improving textile engineering, this model offers a new tool for understanding how microplastic fibers break off from fabrics during everyday use.