Dynamic Behaviour of Single Lap-Jointed Cantilevered Beams

Abstract

The aim of this study is to predict the dynamic behaviour of single lap-jointed cantilevered beams theoretically and to validate the predictions via experimental tests. The ABAQUS finite element analysis (FEA) software was used to predict the natural frequencies, mode shapes and frequency response functions (FRFs) of lap-jointed beams. The LMS (Leuven Measurement System) CADA-X dynamic test software and the LMS-DIFA Scadas II 48 channel data acquisition hardware were used in experimental measurement of the dynamic response of the lap-jointed beams. It is shown that the natural frequencies of the single lap-jointed cantilevered beams from experiment are lower than those predicted using FEA. It is also found that the measued FRFs are close to the predicted FRFs for the first two modes of vibration of the single lap-jointed cantilevered beam. Above the second mode of vibration, there is considerable discrepancy between the measured and predicted FRFs.

Coefficient of Variation and Its Application to Strength Prediction of Adhesively Bonded Joints

“…With many adhesive joints, it is known that there is significant plastic deformation of the adherends prior to the adhesive failure [5]. It is also known that adherend plasticity considerably increases the adhesive strains, leading to failure of the joint.…”

“…Therefore, in the reliability-based adhesively bonded joints design, multivariate functions, which contain several random variables may be met frequently [3][4][5]. In general, the statistical parameters of the multivariate functions may be found by using the statistical parameters of each random variable.…”

Vibration Measurements of Clinched Joints

“…Some relative new joining techniques have drawn more attention in recent years because they can join lightweight materials that are dissimilar, coated and hard to weld with conventional spot welding [1][2][3][4]. Clinching has been developed rapidly into a new branch of mechanical joining techniques [5,6].…”

Application of Finite Element Analysis in Sheet Material Joining

“…A series of the free vibration analyses were carried out for various random values of the geometrical parameters and the through-the-thickness material composition so that a suitable ANN model could be trained successfully. The ABAQUS FEA software was used by He (He, 2009) to predict the natural frequencies, mode shapes and frequency response functions (FRFs) of adhesively lap-jointed beams. In the case of forced vibration of the single lap-jointed cantilevered beam, some typical points on the free edge were chosen for response points because they can better represent the dynamical characteristic of the beams.…”