| Seyedshoja Amini, MSc |
 |
|
Recent publications
| 1. | Amini S., Rezaee Hajidehi M., Stupkiewicz S., Energy and morphology of martensite–twinned martensite interface in CuAlNi shape memory alloy: A phase-field study, COMPUTATIONAL MATERIALS SCIENCE, ISSN: 0927-0256, DOI: 10.1016/j.commatsci.2023.112472, Vol.230, pp.112472-1-13, 2023 Abstract: Needle-like twins are observed experimentally within the transition layer at the martensite–twinned martensite interface. We utilize a phase-field approach to investigate this microstructure. Our goal is to simulate the morphology of the transition layer and to perform a detailed analysis to characterize its interfacial and elastic micro-strain energy. To illustrate the micromechanical framework developed for that purpose, sample computations are carried out for a CuAlNi shape memory alloy undergoing a cubic-to-orthorhombic martensitic transformation. A particular focus of the study is on size-dependent morphology through examining the impact of twin spacing. Additionally, our results reveal that certain twin volume fractions lead to the emergence of twin branching as a way to minimize the total free energy stored in the microstructure. Keywords:Microstructure,Martensitic transformation,Transition layer,Phase-field method,Size effects Affiliations:
|  | ||||||||||||
| 2. | Samaei M.♦, Ahmadi S.♦, Soorki M.♦, Amini S., Comment on S. Ahmed, H. Wang, and Y. Tian, “Robust adaptive fractional-order terminal sliding mode control for lower-limb exoskeleton,” Asian J. Control, vol. 21, no. 1, pp. 1–10 (2019), asian journal of control, ISSN: 1934-6093, DOI: 10.1002/asjc.2912, No.2912, pp.1-4, 2022 Abstract: In this comment, it is shown that there are some non-negligible big mistakes in the analyses and stability proof of the proposed controller in the quoted paper, which makes the main results of this paper to be incorrect. The main unavoidable mistakes in the stability analysis of the main theorem (Theorem 1) are stated and some remarks are also mentioned to fix some of them. Keywords:finite-time convergence, fractional-order controllers, lower-limb exoskeleton, robustadaptive control, terminal sliding mode control Affiliations:
|  |
Conference abstracts
| 1. | Amini S., Rezaee Hajidehi M., Stupkiewicz S., A phase-field study of the energy and morphology of martensite–twinned martensite interface in CuAlNi shape memory alloy, EYEC, European Young Engineers Conference, 2024-04-15/04-17, Warszawa (PL), No.3.1, pp.18-18, 2024 Keywords: microstructure, martensitic phase transformation, transition layer, phase-field method, size effects Affiliations:
| | |||||||||
| 2. | Amini S., Rezaee Hajidehi M., Stupkiewicz S., Continuum model of twin branching in shape memory alloys, EYEC, European Young Engineers Conference, 2024-04-15/04-17, Warszawa (PL), No.3.2, pp.18-18, 2024 Keywords: shape memory alloys, branched microstructures, free energy, continuum model Affiliations:
| | |||||||||
| 3. | Amini S., Rezaee Hajidehi M., Stupkiewicz S., Twin branching in shape memory alloys: a 1D continuum model with energy dissipation effects, SolMech 2024, 43rd Solid Mechanics Conference, 2024-09-16/09-18, Wrocław (PL), pp.96-96, 2024 Keywords: Shape memory alloys, Branched microstructures, Energy minimization, Continuum framework Affiliations:
| |