Belt life prediction

Of these shear stress components i), ii) and hi) all act along the length of the belt, with iv) acting across the belt width. The combined effect of these four shear stresses is shown to have a good correlation with belt life where cord separation is the failure mode, and is used as part of a belt life prediction procedure (based on finite element analysis) which encompasses all the failure modes identified by Gerbert and Fritzson. 

If we take an overview of how the belt delamination failure modes have been analysed by researchers to develop belt life prediction routines it is clear that the different methodologies have a lot in common, and it may be of value to highlight how these belt... 

In attempting to identify parameters which allow the belt life to be predicted within the adhesion related failure modes identified above, the most common approach has been to use measures of belt distortion. Dalgarno [17] examined belt life data from belt failures within the tooth root cracking, fabric delamination and cord separation failure modes. 

Gerbert and Fritzson also developed a procedure for predicting belt life within the cord separation failure mode, based on the shear stress in the cushion region. The overall shear stress arises from four individual components of shear stress ... 

Prediction of Belt Life in Delamination Failure Modes... 

Aspects of pressure, shear stress, friction and abrasion in mbber covered conveyor rollers are reviewed. A model is presented for predicting the effect of belt pressure on the deformation of the lagging, and equations are developed for predicting stresses, slip and abrasion. Experimental results are compared with theoretical predictions. Guidelines are given for the design of rollers with longer service life. 111 refs. 

You would think that product ad activators on television are less effective in directing behavior than promotions at store locations. Similarly, it is reasonable to predict that promoting vehicle safety-belt use on television would be less effective than presenting buckle-up activators at road locations, as exemplified by the "Flash-for-Life" intervention. This assumption is supported by the classic and rigorous evaluation of safety-belt promotion in public service annormcements on television by Robertson et al. (1974). 

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