Estimation of the Longitudinal Elasticity Modulus of Braided Synthetic Fiber Rope Utilizing Classical Laminate Theory with the Unit N/tex

Sry, Vannei; Mizutani, Yoshihiro; Endo, Gen; Suzuki, Yoshiro; Todoroki, Akira

doi:10.3390/app8071096

Cited by 7 publications

(8 citation statements)

References 15 publications

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“…Based on these structural algorithms, the Figure Eight is more secure and stable than the Bowline, as Table 2 indicates. Further, each knots' ability to absorb energy and reduce impact forces is linked to its sinuosity, concatenation and crossing number (Martin et al, 2015;Sry et al, 2018). Energy absorption, of course, is related to the linear modulus of elasticity for ropes, so "elastic" knots are more important in rescue and rope-access contexts where low stretch or static lines are employed (Sry et al, 2018).…”

Section: Bowline and Figure Eightmentioning

confidence: 99%

“…Further, each knots' ability to absorb energy and reduce impact forces is linked to its sinuosity, concatenation and crossing number (Martin et al, 2015;Sry et al, 2018). Energy absorption, of course, is related to the linear modulus of elasticity for ropes, so "elastic" knots are more important in rescue and rope-access contexts where low stretch or static lines are employed (Sry et al, 2018). The Figure Eight Loop is more "elastic" than the Bowline (Audoly, 2007).…”

Section: Bowline and Figure Eightmentioning

confidence: 99%

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An Analytical Review of Figure Eight Loops and Bowlines as Harness Tie-in and Anchoring Knots

Chisnall¹

2021

International Journal of Mountaineering and Climbing

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Emniyet kemerinde kullanılan sekizli düğümleri ve standart bulin düğümünün güçlü ve zayıf yönleri nitel detaylar ve nicel verilerle analiz edilmiştir. Emniyet noktaları uygulamaları da kısaca tartışılmıştır. Düğüm sonlarına atılan backup-ek güvenlik-düğümlerinin çeşitlerine de özellikle yer verildi. Ayrıca hata sebepleri, düğüm hataları, kazalar, gereksiz davranış ve teknikler ve uygulamaların çeşitli standartları incelendi. Bu düğümler, mukavemet, halkaların esneklik fonksiyonu ve atış yöntemi ile yapısal bütünlük açılarından karşılaştırıldı. Güvenlik konusu bükülme ve kuvvetin yön değiştirmesi durumlarına göre nitel özellikleri ve bağıl konumları, biçimlerinden ve büyüklüklerinden ayrı olarak ele alınarak analiz edilmiştir.

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Section: Bowline and Figure Eightmentioning

confidence: 99%

Section: Bowline and Figure Eightmentioning

confidence: 99%

An Analytical Review of Figure Eight Loops and Bowlines as Harness Tie-in and Anchoring Knots

Chisnall¹

2021

International Journal of Mountaineering and Climbing

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“…PR is called auxetics. A negative Poisson’s ratio enables the stiffness and resistance to be actively increased to respond to external stress action loads [ 25 , 26 , 27 , 28 ].

…”

Section: Introductionmentioning

confidence: 99%

Braided Fabrication of a Fiber Bragg Grating Sensor

Lee

2020

Sensors

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Our objective was to construct textile braiding manufacturing methods to facilitate high precision and accurate measurements using optical fiber Bragg grating sensors for various structures. We aimed to combine three-dimensional (3D) braiding processing with the optical Bragg grating sensor’s accurate metrology. Outside the limits of the sensor’s epoxy attachment methods, the textile braiding method can diversify the scope of application. The braiding process can be used to design a 3D fabric module process for multiple objective mechanical fiber arrangements and material characteristics. Optical stress–strain response conditions were explored through the optimization of design elements between the Bragg grating sensor and the braiding. Here, Bragg grating sensors were located 75% away from the fiber center. The sensor core structure was helical with a 1.54 cm pitch, and a polyurethane synthetic yarn was braided together with the sensor using a weaving machine. From the prototype results, a negative Poisson’s ratio resulted in a curled braided Bragg grating sensor. The number of polyurethane strands was studied to determine the role of wrap angle in the braiding. The 12-strands condition showed an increase in double stress–strain response rate at a Poisson’s ratio of 1.3%, and the 16-strands condition was found to have noise affecting the sensor at a Poisson’s ratio of 1.5%. The findings suggested the application of braiding fabrication to the Bragg grating sensor could help to develop a new monitoring sensor.

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“…In view of that, rope is considered one of the most used braided products in various technical applications. It is a load-bearing structure used to support tensile loads, however it is very flexible in bending [10,22]. The mechanical properties of ropes are highly affected by their construction, braiding method, yarns type, linear density, braid angle, directional fiber volume fraction, and pre- and post-production heat and treatments [22–24].…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the interaction between braiding structural parameters and their effects on ropes mechanical properties

Hamouda

Aly

Elshakankery

2020

Journal of Industrial Textiles

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Braided rope configuration and properties are the main key factors to consider on choosing it for various industrial applications. Rope's structure is characterized by high axial tensile strength combined with flexibility. The mechanical properties of ropes are greatly influenced by braiding process settings which have crucial effects on their functional performance. In this study, 27 types of braided polyester ropes were produced and divided into three groups according to their structural parameters and braiding settings, which include take-up and tension rates, yarn count, braid pattern, number of spindles and carriers' settings. The effects of changing these parameters on braid angle, repeat length, linear density, and mechanical properties such as tensile stress, strain and tensile modulus were investigated. Statistical analysis was conducted to evaluate the results using multiple regression analysis, F-test, surface and contour plots to illustrate the relation and the interaction between variables that have significant effects on the ropes' properties and to assess their performance. The results indicated that increasing the take-up rate leads to increase the ropes' braid angle. Whereas, increasing the tension leads to obtain ropes of low linear density with high stress and modulus. Ropes of lower strain were attained by increasing the take-up and decreasing the tension rates. Furthermore, the rope sample produced with pattern 2/2 using the high take-up and medium tension rate achieved the highest mechanical properties of high stress, modulus with low strain among all rope samples in the three groups.

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Estimation of the Longitudinal Elasticity Modulus of Braided Synthetic Fiber Rope Utilizing Classical Laminate Theory with the Unit N/tex

Cited by 7 publications

References 15 publications

An Analytical Review of Figure Eight Loops and Bowlines as Harness Tie-in and Anchoring Knots

An Analytical Review of Figure Eight Loops and Bowlines as Harness Tie-in and Anchoring Knots

Braided Fabrication of a Fiber Bragg Grating Sensor

An experimental study on the interaction between braiding structural parameters and their effects on ropes mechanical properties

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