Numerically validated reduced-order model for laminates containing shape memory alloy wire meshes

Abstract

The incorporation of active materials into composites is an active area of research. However, the design and optimization of such composites is challenging because detailed analysis using finite element analysis (FEA) is computationally intensive. This work presents a new reduced-order model for laminates containing shape memory alloy (SMA) wire meshes that significantly reduces the computational burden on design analysis while maintaining good accuracy. The approach is based on a foundation of classical laminated plate theory (CLPT). It considers fully non-linear stress distributions and incorporates a detailed phenomenological model of the hysteretic SMA constitutive behavior. The reducedorder CLPT-based model and its numerical implementation are fully described and unique laminate responses are presented. The model is validated against a corresponding high-fidelity FEA model of an SMA-based laminate. The reduced-order model produces accurate predictions at significantly less expense than the high-fidelity FEA approach, with normalized root-mean-squared error below 10% for most design cases.

Modeling and design optimization of shape memory alloy-enabled building skins for adaptive ventilation

“…The two main components of the adaptive skins are a flexible panel and SMA wires. The capability of SMAs in wire form to provide controlled deformation to plates and shell systems has been demonstrated in previous works addressing self-foldable origami sheets (Halbert et al, 2016;Lee et al, 2013;Peraza Hernandez et al, 2014, compliant mechanisms Hwang and Higuchi, 2015), and multistable plates (Dano and Hyer, 2003;Peraza Hernandez et al, 2015); hence, SMAs are expected to be a viable option for panel-based adaptive skins. Figure 1(a) shows the working principle of the presented adaptive skins.…”

Model based design of antagonistic shape memory alloy spring devices

“…Simplifications to existing models are usually made according to specifications for the particular application. In Furst et al (2013), a monocrystallic model is employed to reduce the model size, or in Halbert et al (2016), model reduction techniques are utilized to reduce the corresponding computational requirements. In Lagoudas et al (2001), the simplification of a thermodynamics constitutive model has led to a piecewise description of the superelastic SMA behavior yielding a model with low computational requirements.…”

Εφαρμογές Και Έλεγχος Έξυπνων Υλικών Με Έμφαση Στην Χρησιμοποίησή Τους Ως Επενεργητές

“…Συνήθως δέχονται απλοποιήσεις, σύμφωνα με τις απαιτήσεις της εφαρμογής. Για παράδειγμα στο [51] χρησιμοποιείται μια περιγραφή του ΜΚ ως μονοκρυσταλλικό υλικό, ώστε να μειωθεί η τάξη του μοντέλου, ενώ στο [57] εισάγονται τεχνικές μείωσης του μοντέλου ώστε να μειωθούν οι απαιτήσεις σε υπολογιστική ισχύ. Ένα απλοποιημένο μοντέλο προτείνεται στο [58], για την περιγραφή της ψευδοελαστικότητας σωλήνων ΜΚ, βασισμένο στην σύγκριση της απόκρισης του συστήματος με ένα μηχανικό σύστημα.…”