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Eccentricity, load path

It is important to realise that the bonded joint design may only ensure that the joint is capable of withstanding the external loads assumed in the design. Further on, in the case of certain configurations with highly eccentric load paths, such as lap and strap joints, it... [Pg.459]

In practice, it is desirable to avoid the application of tensile loads to an adhesive system. Tensile strengths of most substrates are typically much higher than those of the adhesive therefore, failure of the bonded structure will occur predominantly within the adhesive during use. Although tensile loads are avoided in adhesive design, they nevertheless do occur due to bending of the substrates and to eccentric loading paths applied to the joint. It is, therefore, necessary to evaluate the tensile properties of structural adhesives. [Pg.410]

One distinctive and challenging feature of a single lap joint is its eccentric load path, which leads to the geometric nonlinearity that requires the load update. Goland and Reissner (1944)... [Pg.607]

Closed form solutions. Structural adhesive joints are generally designed to be loaded in shear so that treatments of joint analyses are confined essentially to the transfer of load by shear, with some consideration of the transverse normal stresses induced by eccentricities in the load path. In the simplest case the adhesive and the adherends are assumed to behave elastically. The most refined analyses attempt to model the situation when the adhesive yields so that the adhesive and, eventually, the adherends behave plastically as the imposed load is raised. Closed-form analyses are difficult to apply to other than simple geometrical configurations, while a major difficulty with the elasto-plastic model is how to characterise the adhesive. [Pg.125]

The joint configuration is a single-lap joint with adherends of equal thickness t. Note that the bending moment due to the load path eccentricity is not taken into account. Joint rotation due to bending of the adherends is also neglected. [Pg.475]

Volkersen s theory is incomplete because it does not account for bending of the adherends from the eccentricity of the loading path. Predictions based on Volkersen s work would seem more valid for double-lap joints where bending is minimized. [Pg.429]

Adhesive shear stresses originate because of different axial deformations of the adherends whereas peel stresses primarily develop due to eccentricity in the load path, as is the case for unstabilized single-lap shear joint configurations. Considerable local stress concentrations near discontinuities in the substrate, the adhesive bond or the FRP strengthening material are the major common attribute for both shear and peel stresses, as illustrated in Fig. 10.1. [Pg.257]

Fig. 5 explains how the eccentricity in load path, between the bottom face of the upper splice plate and its centroid, creates a moment as shear loads are transferred that can be balanced only by normal (peel) stresses developed in the adhesive. Note that this effect exists even if there is no primary eccentricity in load path of the type found in single-lap and single-strap bonded joints, for which the corresponding phenomena are explained later. In both cases, peel stresses peak at the edge of the overlap and decay to negligibility away from any discontinuities, oscillating as they do to satisfy the requirement that there is no net vertical force on either splice plate. [Pg.732]

Effect of overlap length on strength of bonded joints (with no eccentricities in load path)... [Pg.739]

Figure 6.11 Schematic representation of how the eccentricity of the loading path in a single lap joint gives rise to bending moments and how deformation of the substrates upon loading may reduce these bending moments. Figure 6.11 Schematic representation of how the eccentricity of the loading path in a single lap joint gives rise to bending moments and how deformation of the substrates upon loading may reduce these bending moments.
Figure 6.14 Schematic representation showing interlaminar failure of fibre composite substrates arising from the transverse (out-of-plane) tensile stresses, o-ii, which occur due to the eccentricity of the loading path, and the relatively poor transverse strength of fibre composites. Figure 6.14 Schematic representation showing interlaminar failure of fibre composite substrates arising from the transverse (out-of-plane) tensile stresses, o-ii, which occur due to the eccentricity of the loading path, and the relatively poor transverse strength of fibre composites.
Comparing the two solutions by use of polar journal displacement paths under the same load pattern, the result from Hahn shows higher eccentricities under conditions where the displacement gets smaller. One example is given in Fig. 6. [Pg.468]

The X ratio also depends cm the kinematic and loading conditions imposed on hip simulators. Firkins et al (2001b) have shown that in the simulator with two input motions which H-oduced an open elliptical wear path with greato eccentricity, the wear rate was at least ten times higher thmi friat in the simulator with three independent input motions whidi produced a low level of eccentricity. However, the detailed variation of the motion cycles has be i found to have a small effect on wear (Smith et al 2001d). [Pg.250]


See other pages where Eccentricity, load path is mentioned: [Pg.501]    [Pg.38]    [Pg.501]    [Pg.38]    [Pg.75]    [Pg.75]    [Pg.421]    [Pg.456]    [Pg.443]    [Pg.728]    [Pg.731]    [Pg.739]    [Pg.765]    [Pg.765]    [Pg.766]    [Pg.767]    [Pg.215]    [Pg.222]    [Pg.222]    [Pg.227]    [Pg.235]    [Pg.236]    [Pg.90]   
See also in sourсe #XX -- [ Pg.765 ]




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