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Pascal Fossat, Madhurima Kothakota, Mohamed Ichchou and Olivier Bareille
This work addresses the dynamic modeling of a negative stiffness absorber consisting of an assembly of curved beams. Design rules are derived from the orders of magnitude of stiffness and elastic energy stored by the negative stiffness elements. Although...
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Stian H. Sørum, Nuno Fonseca, Michael Kent and Rui Pedro Faria
Fibre ropes offer beneficial properties for mooring of floating offshore wind turbines (FOWTs). However, the mooring line?s stiffness is both load-history and load-rate dependent. A quasi-static stiffness is observed for slow loading, with a higher stiff...
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Kazimierz A. Orlowski, Przemyslaw Dudek, Daniel Chuchala, Wojciech Blacharski and Tomasz Przybylinski
Cutting wood with circular saws is a popular machining operation in the woodworking and furniture industries. In the latter sliding table saws (panel saws) are commonly used for cutting of medium density fiberboards (MDF), high density fiberboards (HDF),...
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Zhifei Ji, Tuanjie Li, Min Lin
Pág. 101 - 111
In this work, the kinematics and stiffness of a planar tensegrity parallel mechanism are investigated. The analytical solutions to the forward and reverse kinematics were found using an energy method. The singular configurations and workspaces were detai...
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Ruchi Shah, Marina W. Samuel and Jongsang Son
The aim of this review was to provide an overview of the recent findings on the acute and chronic effects of static stretching on joint behaviors and neuromuscular responses and to discuss the overall effects of acute and chronic static stretching on sel...
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Jozef Gocál, Josef Vican, Jaroslav Odrobinák, Richard Hlinka, Franti?ek Bahleda and Agnieszka Wdowiak-Postulak
In addition to traditional building materials, such as steel and concrete, wood has been gaining increasing prominence in recent years. In the past, the use of wood was limited due to its susceptibility to damage by fungi, insects, and temperature. These...
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Mingming Zhao and Jinchen Ji
This paper studies the dynamic response of a wind turbine gearbox under different excitation conditions. The proposed 4 degree-of-freedom (DOF) dynamic model takes into account the key factors such as the time-varying mesh stiffness, bearing stiffness, d...
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Joran van Blokland, Stergios Adamopoulos and Sheikh Ali Ahmed
Previous studies have shown that thermally modified wood (TMW) performs well in outdoor, above-ground conditions in terms of resistance to wood-decaying fungi. Yet, little is known about the development of defects such as checks and the corresponding mec...
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Bora Pulatsu, Semih Gonen and Paulo B. Lourenço
Unreinforced masonry structures are susceptible to man-made hazards such as impact and blast loading. However, the literature on this subject mainly focuses on masonry wall behavior, and there is a knowledge gap about the behavior of masonry arches under...
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Lars Vabbersgaard Andersen, Thomas Lykke Andersen and Lance Manuel
Monopiles are the most common type of foundation used for bottom-fixed offshore wind turbines. This investigation concerns the influence of uncertainty related to soil–structure interaction models used to represent monopile–soil systems. The ...
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Lars Vabbersgaard Andersen, Thomas Lykke Andersen and Lance Manuel
Monopiles are the most common type of foundation used for bottom-fixed offshore wind turbines. This investigation concerns the influence of uncertainty related to soil–structure interaction models used to represent monopile–soil systems. The ...
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Lars Vabbersgaard Andersen, Thomas Lykke Andersen and Lance Manuel
Monopiles are the most common type of foundation used for bottom-fixed offshore wind turbines. This investigation concerns the influence of uncertainty related to soil?structure interaction models used to represent monopile?soil systems. The system respo...
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Ricardo Faustino Teles,Cláudio Henrique Soares Del Menezzi,Frederico de Souza,Mário Rabelo de Souza
Pág. DOI: 10.12 - 6830.v02n0
The paper aimed at evaluating the interrelationship between three nondestructive methods to predict the stiffness of a tropical hardwood (Sextonia rubra). Lumber material from Sextonia rubra was collected, ripped and planned and boards were then nondestr...
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Sheikh Ali Ahmed, Stergios Adamopoulos, Junqiu Li and Janka Kovacikova
Change of relative humidity (RH) in surrounding environment can greatly affect the physical and mechanical properties of wood-based panels. Commercially produced acetylated medium density fiberboard (MDF), Medite Tricoya®, was used in this study to predi...
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Sayed Mohamad Soleimani and Sajjad Sayyar Roudsari
During dynamic events (such as impact forces), structures fail to absorb the incoming energy and catastrophic collapse may occur. Impact and quasi-static tests were carried out on reinforced concrete beams with and without externally bounded sprayed and ...
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Dinh-Phuc Tran, Hung-I Lu and Chih-Kuang Lin
The objective of this study is to investigate the effect of long-term static bending on the conductive characteristics of indium tin oxide (ITO) thin film in flexible optoelectronics. Two types of substrate are considered, namely ITO on polyethylene naph...
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Xun Zhang, Qiankun Liu, Weiwei Xiao, Fan Yu, Liming Cai and Lianzhi Song
In this investigation, a U-shaped connection (U-C) was introduced for a prefabricated steel plate shear wall with beam-only connections. This design replaces a portion of shear bolts with tension bolts to enhance bolt efficiency and reduce the overall bo...
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Oleg Kabantsev and Mikhail Kovalev
The article presents experimental tests carried out to investigate the effect of crack width (0.4, 0.8, 1.5, and 3.0 mm) on the behavior of anchor bolts under static and dynamic loading. Ultimate loads for anchors reached 220 kN depending on the anchor t...
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Yanan Wang, Keyuan Li, Baijie Qiao, Zhixian Shen and Xuefeng Chen
The internal gear is part of the planetary and epicyclic gear pairs in the transmission system of the helicopter. Gear tooth wear is one of the most usual gear failures. This paper establishes an analytical model to evaluate the influence of tooth wear o...
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Xiaoyuan Zheng, Cheng Zhang, Yifang Lou, Guangming Xue and Hongbai Bai
Active vibration control shows excellent performance in vibration isolation. In this work, the finite element model of a toothed electromagnetic spring (TES) is established using ANSYS Maxwell software. Subsequently, a static characteristic experiment of...
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