CASTIGLIANO’S THEOREM IN THE STUDY OF NONLINEAR ELASTIC STRUCTURAL ELEMENTS WITH POWER-LAW CONSTITUTIVE MODEL
Abstract
The strong development of the industry in the last period has led to the strong diversification of the materials used in engineering applications and also to the increase of the forces and speeds that appear in these systems. As a result, numerous researches were undertaken that took into account the non-linear behavior of materials during the operation of mechanical systems. Constituent laws can no longer be considered linear laws. Numerous forms of constitutive laws have been proposed to cover the existing non-linearities. Among them, the power law type laws were noted, in which the dependence is of an exponential type. In the work, results were obtained regarding strain and stress appearing in standard elements used in engineering. Also, the possibility of using Castigliano's theorem was studied in the case of application to materials with non-linear behavior, with a power law constitutive law. The obtained results can be useful to engineers because they offer quick results and with good precision.
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