|
|
|
|
| |
|
|
| Zangiácomo,André L.; Christoforo,André L.; Lahr,Francisco A. R.. |
| ABSTRACT This research aimed at estimating both longitudinal (E) and shear (G) elasticity moduli of round structural-sized beams made of Pinus caribaea timber, verifying thus the validity of the G = E/ 20 relationship established by the Brazilian standard ABNT NBR 7190: 1997 (Designing of Wooden Structures). We tested twenty pieces of green wood with average length, diameter and conicity of 750 cm, 30 cm and 4%, respectively. Two static bending tests were applied at three points of each piece, being nondestructive and using different distances between supports. In the first trial, the length and diameter relationship (L/ d) was set as being equal to 24; yet in the second test, it was set at 12. The elasticity moduli were estimated by a successive use of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stiffness; Bending; Beam theory; Least square. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000300566 |
| |
|
|
| Davies, Peter; Francois, M; Lacotte, Nicolas; Vu, Thanh Do; Durville, Damien. |
| Repeated bending over sheaves is one of the main causes of failure of synthetic fibre ropes used in marine operations. There are few published results available and even fewer models allowing lifetime to be estimated. A large new set of data from cyclic bend over sheave (CBOS) tests on 250 kN break load braided HMPE synthetic ropes is presented first, both tests to failure and interrupted tests followed by residual strength measurements. These data are analysed in order to propose an empirical lifetime model. This is identified using constant load tests, then evaluated for variable load sequences. A methodology to include rope lifetime prediction in handling system design is then discussed. |
| Tipo: Text |
Palavras-chave: Fibre rope; Bending; Sheave; Abrasion; Fatigue. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00251/36215/34775.pdf |
| |
|
|
| HONGO, Akio; DEVEE, Enkhee; TOUKURA, Yuji; ARO ARO, Juan Marcos; HIRATA, Masahiro. |
| The biting force used by sheep was investigated in order to clarify the effect of bending and shearing properties of leaf blade sections of orchardgrass (Dactylis glomerata). Five, 10, 15, 20 or 25 leaf blade sections per loadcell from basal and middle parts were offered to sheep. The three-dimensional biting forces were digitally recorded at 0.006-second intervals using the threedimensional loadcell. DM weight per mean biting force (benefit/cost ratio) was not significantly different among any treatments, and its grand mean was 16.7±1.1 mg-DM/N. There was a significant correlation between bending strength and shearing strength, strongly suggesting that sheep may recognize chewing ease of leaf blade sections through sensing bending strength prior to... |
|
Palavras-chave: Bending; Biting force; Orchardgrass; Shearing; Sheep; 曲げ; バイト強度; オーチャードグラス; せん断; ヒツジ. |
| Ano: 2009 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2646 |
| |
|
|
|
