This work, aims to verify the feasibility to process a particular Fe-based shape memory alloy, by means of additive manufacturing. The thesis focuses on studying the super-elastic behaviour of the manufactured specimens, performing axial tests. The curves obtained are as well used to extrapolate material parameters, useful to calibrate a mathematical model able to describe its response. This model is then used, with the aid of Abaqus CAE software, to simulate the samples behaviour with finite element method. In addition, employing of shape memory alloys to produce lattice structures is discussed, together the relative FEM simulations of the most popular unit-cells.
Questo lavoro di tesi è volto ad verificare la fattibilità della stampa con processo SLM di una particolare lega a memoria di forma a base ferro. Lo studio si occupa di analizzare in particolare la caratteristica super-elastica dei provini ottenuti, attraverso test di compressione assiale. Inoltre, le curve ottenute permettono di ricavare i parametri materiale, per poter calibrare un modello matematico che ne descrive il comportamento. Tale modello viene poi implementato nell’analisi ad elementi finiti, con l’ausilio del software Abaqus CAE. All’interno della tesi, viene inoltre discusso l’impiego di leghe con caratteristiche super-elastiche nella produzione di strutture reticolari, con relative simulazioni agli elementi finiti.
Investigating the super-elastic behaviour in 4D-printed Fe-based shape memory alloy
Resta, Davide
2019/2020
Abstract
This work, aims to verify the feasibility to process a particular Fe-based shape memory alloy, by means of additive manufacturing. The thesis focuses on studying the super-elastic behaviour of the manufactured specimens, performing axial tests. The curves obtained are as well used to extrapolate material parameters, useful to calibrate a mathematical model able to describe its response. This model is then used, with the aid of Abaqus CAE software, to simulate the samples behaviour with finite element method. In addition, employing of shape memory alloys to produce lattice structures is discussed, together the relative FEM simulations of the most popular unit-cells.File | Dimensione | Formato | |
---|---|---|---|
Investigating the super-elastic behavior in 4D-printed Fe-based Shape Memory Alloy.pdf
accessibile in internet solo dagli utenti autorizzati
Dimensione
8.49 MB
Formato
Adobe PDF
|
8.49 MB | Adobe PDF | Visualizza/Apri |
I documenti in POLITesi sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/10589/171215