Numerical procedures are developed for the homogenization and evaluation of the stress field in a composite as a consequence of the presence of embedded SMA (shape-memory alloy) wires. In particular, the elastic field developed at the end of the SMA wire self-strain process is studied, knowledge of which is necessary to evaluate the feasibility of such a hybrid composite. First, the numerical procedures are applied to the study of both a representative volume element (RVE) included in a theoretically infinite periodic medium and a RVE located near the medium free boundary, in order to evaluate the tangential stress field generated at the end of the fiber; then they are applied to the study of a plate able to bend after the effect of self-strain of the SMA wire. Observations are reported about the obtained results and about the similarities and the differences between the two problems.
Numerical homogenization techniques for the evaluation of mechanical behaviour of a composite with SMA inclusions / V. Alecci; S. Briccoli Bati; G. Ranocchiai. - In: JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES. - ISSN 1559-3959. - ELETTRONICO. - 4, No 10:(2009), pp. 1675-1688. [10.2140/jomms.2009.4.1675]
Numerical homogenization techniques for the evaluation of mechanical behaviour of a composite with SMA inclusions
ALECCI, VALERIO;BRICCOLI BATI, SILVIA;RANOCCHIAI, GIOVANNA
2009
Abstract
Numerical procedures are developed for the homogenization and evaluation of the stress field in a composite as a consequence of the presence of embedded SMA (shape-memory alloy) wires. In particular, the elastic field developed at the end of the SMA wire self-strain process is studied, knowledge of which is necessary to evaluate the feasibility of such a hybrid composite. First, the numerical procedures are applied to the study of both a representative volume element (RVE) included in a theoretically infinite periodic medium and a RVE located near the medium free boundary, in order to evaluate the tangential stress field generated at the end of the fiber; then they are applied to the study of a plate able to bend after the effect of self-strain of the SMA wire. Observations are reported about the obtained results and about the similarities and the differences between the two problems.File | Dimensione | Formato | |
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