Research results will be different when the boundary condition is changed. In this work, the finite element model of the linear rolling guide of the NC machine tool is established. Then the natural frequencies and the corresponding vibration modals of the linear rolling guide model are obtained with two different boundary conditions. One boundary condition is that the movable joint surface of t...

Fatigue crack growth during the service life of aging aircraft is a critical issue and monitoring of such cracks in structural hotspots is the goal of this research. This paper presents a procedure for classification and detection of cracks generated in bolted joints which are used at numerous locations in aircraft structures. Single lap bolted joints were equipped with surface mounted piezoele...

In order to study the mechanical behavior of corroded bolt-sphere joints and predict bearing capacity in a corrosive environment, bolt-sphere-connection bolt-sphere-joint specimens with differing degrees corrosion were obtained by accelerated corrosion. The tensile properties connections members tested, respectively, effects different on bolted spherical studied. Finally, numerical simulation w...

Abstract A detailed finite element (FE) model of M20 bolted joint is established. Using the FE model, loosening processes under different transverse vibration amplitude are simulated. The results show that there exists a critical amplitude. When smaller than amplitude, will not loosen. it larger is, faster loosens. Based on clamping force, nut rotation angle, bolt torsion deformation and slip t...

Bolted joints are generally used to connect two or more mechanical structures due their ease of assembly and disassembly for maintenance. However, the problem vibration is one main challenges when tightness bolted insufficient, causing failures such as looseness resulting in disconnection. Looseness most common cause dynamically loaded joint structure failure. This study tested a simple bolt ob...

Due to the commonly eccentric connection on only one angle leg (bolted or welded), additional bending moments are acting member under compression axial force, leading a complex load-carrying behaviour with flexural and/or torsional buckling phenomena. Furthermore, type and size of rotational restraints at member's ends (provided by adjacent structure) significantly influence capacity these memb...