Publications de Marjan Ghorbani

Thermomechanical constitutive modeling of the Kirigami-inspired shape memory alloy

Yves Perriard, Thomas Guillaume Martinez, Marjan Ghorbani

Shape memory alloys (SMAs) are unique materials capable of recovering predefined shapes through reversible phase transformations between austenite and martensite phases. This behavior enables SMAs to exhibit the shape memory effect and pseudoelasticity, al ...

2025

Shape memory alloy mechanical actuator with reduced commutation time

Simon Nessim Henein, Charles Baur, Loïc Benoît Tissot-Daguette, Marjan Ghorbani

Using shape memory alloys (SMAs) as actuators offers several advantages, including high power density, large stroke capabilities, and friction elimination. These attributes make SMAs suitable for actuating flexure-based mechanisms in a wide array of extrem ...

2024

Improvement of Shape Memory Alloy (NiTi) Actuation Frequency Using Highly Thermally Conductive Metal Layer

Yves Perriard, Thomas Guillaume Martinez, Marjan Ghorbani

In this paper, we investigate a novel passive approach to improve the actuation frequency of Shape Memory Alloys (SMAs) with the Kirigami-inspired design using a thin layer of highly thermally conductive material. By depositing an 80 nm layer of gold on th ...

Institute of Electrical and Electronics Engineers Inc.2024

Contact Tip Trajectory in Steady-State Regime Prediction Using Deep Learning for Piezoelectric Actuators

Paolo Germano, Yves Perriard, Marc Michel Charles Favier, Marjan Ghorbani

Including friction modeling in simulation can be challenging and requires time domain simulation, which is time consuming. We propose to separate the friction modelling from the FEA (Finite Element Analysis). The approach is defined for UCM (Ultrasonic Cer ...

Institute of Electrical and Electronics Engineers Inc.2024

Fabrication and Characterization of the Kirigami-Inspired SMA-Powered Actuator

Yves Perriard, Sean Thomas, Guilain Lionel Germain Lang, Thomas Guillaume Martinez, Marjan Ghorbani

This paper presents an innovative approach to creating Shape Memory Alloys (SMA)-based actuators that are lightweight, compact, and capable of providing large strokes. Inspired by the Kirigami structure, an SMA actuator is designed using the Ω -pattern, wh ...

2023

Towards Development of a Novel Variable Stiffness Instrumented Gripper

Yves Perriard, Dan Cisier, Marjan Ghorbani, Bhawnath Tiwari

The need for the gripper becomes more demanding when it comes to automated manipulation or handling of fragile structures. Depending on the object and the task requirements, a single gripper with a fixed stiffness may not be enough, and a variable mechanis ...

IEEE2023

Improve the Time Response of Shape Memory NiTi Sheets Using Highly Conductive Elastomer Layers

Yves Perriard, Thomas Guillaume Martinez, Sofia Lydia Ntella, Marjan Ghorbani

Shape Memory Alloys (SMAs) have gained significant attention due to their high work density in order to fabricate compact and lightweight actuators. However, the major drawback of thermally activated SMAs is the time that takes for these materials to cool ...

IEEE2022

Modelling and Fabrication of a Kirigami-Inspired Shape Memory Alloy Actuator

Yves Perriard, Sean Thomas, Thomas Guillaume Martinez, Marjan Ghorbani

Shape Memory Alloys (SMA) based actuators have increasingly been used in lightweight and compact actuators. In this paper, a novel kirigami-inspired SMA actuator is designed and presented. This work aims to show a novel way of fabricating large stroke flex ...

IEEE2021