STATE OF STRESS EVALUATION OF STRUCTURAL ELEMENTS BY MODAL SYNTHESIS

In this paper various modalities of determination of stress time histories obtained by means of numerical simulation (MB modelling of mechanical systems combined with FE modelling of their components) are shown. A stress evaluation procedure, implemented by the authors for a particular MBS/FEM environment is shown. Meaningful comparisons are proposed between various procedures of stress calculation, using as reference a simple notched bar, whose finite element model has been validated by means of comparison with experimental result in literature. Analogous and further considerations on damage are developed on a simple articulated mechanical system, analysed within MBS/FEM, using the hypothesis of high cycle fatigue