M. Urbano, SAES Getters S.p.A, Lainate, Italy; F. Auricchio, S. Morganti, A. Reali, University of Pavia, Pavia, Italy
In this work the shape memory effect of SMA beams in complex stress conditions is studied by means of a FE model. A 1D constitutive model of the material, already described in [1], has been utilized in the numerical computation. The following procedure has been applied: First the needed model parameters are obtained experimentally by means of thermal cycling tests in tension under different constant load. The model, ones calibrated, is afterwards utilized to compute the deformation of beams loaded in bending and undergoing thermal cycling. Three point bending and cantilever configurations are considered in this stage. Finally the predicted properties of the model are compared to experimental results and the model capabilities are discussed: in particular, insight of the stress and strain evolution in bending is provided. [1] SMA Numerical Modeling Versus Experimental Results: Parameter Identification and Model Prediction Capabilities in the following paginated issue of Journal of Materials Engineering and Performance: Volume 18, Issue 5 (2009), Page 649.
Summary: In this work the shape memory effect of SMA beams in complex stress conditions is studied by means of a FE model. A 1D constitutive model of the material has been utilized in the numerical computation.
The predicted properties of the model are compared to experimental results and the model capabilities are discussed: in particular, insight of the stress and strain evolution in bending is provided.
