On the dynamic buckling of a simple elastic-plastic model

The credibility of predictions for structural designs subjected to large dynamic loadings causing inelastic behaviour

“…The analysis in Ref. [29] also demonstrated the importance of loading history effects. It was observed for small imperfections that the elasticeplastic loading histories of the structure were different for static and dynamic loadings.…”

“…For an example of the complexity in this area, it is shown for the idealised structural model studied in Ref. [29], when subjected to a pulse load having a rectangular shaped pressureetime history, that dynamic elasticeplastic buckling can develop for small imperfections, while larger imperfections can give rise to a wholly elastic instability. Further study [30] has revealed that the structural instability of this idealised model is more sensitive to the presence of initial imperfections at higher than at lower impact velocities.…”

New analytical method for dynamic non-linear elastic-plastic deformation of rotating machine rotor

“…The shaft dynamic problems because of an excessive axial load are important sources of the machine failure and the machine unexpected shutdown for repair (Fagundes et al, 2004;Grzebieta & Murray, 1983;Jones & Dos Reis, 1980;Meher-Homji et al, 2007;Lecuyer et al, 2008;Tessarolo et al, 2011;Judd et al, 2010;Pei et al, 2010;Bonnett, 1999). These failures consisted of severe scuffing and wear between rotating/static components, together with badly damage of the axial bearing (the thrust bearing).…”

“…Previously proposed finite element methods are restricted in various limits and uncertainties and relatively accurate results need countless meshes, continual re-meshing and other special considerations (Kacprzynski et al, 2001;Fagundes et al, 2004;Grzebieta & Murray, 1983;Jones & Dos Reis, 1980). The rotor is subjected to various forces including the fluid and inertia loads.…”

Piston rod load analysis of process reciprocating machines

“…Using the 'Principle of virtual work' [12,13], equation (1) can be written with respect to Fig. 1 2F…”