Constitutive Modeling of Shape memory alloys

Shape memory alloys (SMAs) are smart materials showing two unique properties: superelasticity and shape-memory effect. Superelasticity allows SMAs to undergo large deformation upon loading at high temperatures (large strains can be undergone, until 8-10%) and to recover their original shape when unloaded (Figure 1). Shape memory effect is the ability to maintain a deformed shape up to heat induced recovery of the original shape (Figure 2).

Figure 1. Superelasticity.

Figure 2. Shape memory effect.

The advantages brought by SMA behavior make shape memory materials suitable for a variety of innovative applications (Figures 3, 4, 5, 6, 7), in fields like biomedical engineering (e.g. stents, surgery tools), aerospace (e.g. fastening devices), robotics (e.g. actuators), mechanical (e.g. SMA actuated valves) and civil engineering (e.g. damping devices).

Figure 3. Shape memory rotary actuator.



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Home Group Members Research Activities Topics Dissertations / Theses Publications Laboratories β-lab nume-lab mate-lab proto-lab activ-lab Funded Projects Ongoing Finalized Professional consulting PhD Program Teaching Available Courses Past Courses Lab Individual Project Proposals Past Individual Projects Seminars/Events Links 3D@UniPV Additive Project NL18 Course IDBN Congress	Constitutive Modeling of Shape Memory Alloys Shape memory alloys (SMAs) are smart materials showing two unique properties: superelasticity and shape-memory effect. Superelasticity allows SMAs to undergo large deformation upon loading at high temperatures (large strains can be undergone, until 8-10%) and to recover their original shape when unloaded (Figure 1). Shape memory effect is the ability to maintain a deformed shape up to heat induced recovery of the original shape (Figure 2). Figure 1. Superelasticity. Figure 2. Shape memory effect. The advantages brought by SMA behavior make shape memory materials suitable for a variety of innovative applications (Figures 3, 4, 5, 6, 7), in fields like biomedical engineering (e.g. stents, surgery tools), aerospace (e.g. fastening devices), robotics (e.g. actuators), mechanical (e.g. SMA actuated valves) and civil engineering (e.g. damping devices). Figure 3. Shape memory rotary actuator. Figure 4. Shape memory microgripper. Figure 5. Nitinol stent-graft Figure 6. Adaptive wing. Figure 7. Grab handle activated by SMA wires. Theory and implementation Porous NiTi alloys Documents SMA modeling approaches Shape memory alloys: computational models for industrial applications Main collaborations: Saes Getters, Dr. Marco Urbano CNRS Ecole Polytechnique Palaiseau France, Prof. A. Costantinescu Chemistry Dept./Section Physical Chemistry, University of Pavia, Prof. U. Anselmi Tamburini, Prof. G. Spinolo References [P1] F. Auricchio, E. Boatti, M. Conti. SMA Biomedical Applications in "Shape Memory Alloy engineering: for Aerospace, Structural and Biomedical Applications", editors: L. Lecce, A. Concilio, F. Auricchio. Elsevier, 307-341. [P2] F. Auricchio, E. Boatti, M. Conti. SMA Cardiovascular Applications and Computer-Based Design in "Shape Memory Alloy engineering: for Aerospace, Structural and Biomedical Applications", editors: L. Lecce, A. Concilio, F. Auricchio. Elsevier, 343-367.

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