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| Davies, Peter; Durville, Damien; Vu, Thanh Do. |
| Twist may be introduced accidentally into braided ropes during operations at sea, and it is important to know how this will affect both rope integrity and safety coefficients. This paper describes the use of simulation tools to evaluate how twisting can change the tensile properties of braided ropes. The case of a 300 kN break load 12 strand braided HMPE rope is examined. An original numerical modelling approach is presented, and results are compared with results from tensile tests performed on ropes with different levels of twist. A drop in strength of around 4% per turn per meter, and an increase in elongation, were observed as the number of turns per meter increased, corresponding to progressive removal of the load-bearing capacity of half the braided... |
| Tipo: Text |
Palavras-chave: Torsion; Rope; Braid; Numerical model. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00346/45696/45354.pdf |
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| Aktas,Ayfer; Tuncer,M. Cudi; Yildirim,Ayse; Nergiz,Yusuf; Akkus,Murat. |
| In this study, we evaluated the ultrastructural findings of testis with systemic administration of different doses of melatonin during ischemic period in a rat model of testicular torsion/detorsion (T/D). Testis ischemia-reperfusion (I/R) injury was induced by torsion of the left testis, with a 720 degrees twisting of the spermatic cord so as to produce a total occlusion of testis for 2.5 hours. Subsequently, the same testis was then detorsioned. According to surgical procedure in each group, unilateral orchiectomies were performed for histopathologic examination. The groups were labelled as control group, torsion group (T), torsion and detorsion group (T/D), torsion-detorsion and melatonin group (T/D+20,50 and 100 mg/kg melatonin). For the histological... |
| Tipo: Journal article |
Palavras-chave: Testis; Torsion; Detorsion; Spraque-Dawley rat; Melatonin. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000100001 |
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