Thesis supervisor: Kolos Molnár
Location of studies (in Hungarian): 1111 Budapest, Műegyetem rkp. 3. T build. 315. Abbreviation of location of studies: PT
Description of the research topic:
a.) Antecedents: Nowadays, researches are conducted on the modification of mechanical behavior of polymer composites, e.g. for the improvement of stiffness and of strength. Interlaminar fracture is a key parameter under conditions such as fatigue, compression/tension and impact in each of these cases, delaminations due to the mode I and II loading can be important causes of material failure. By using electrospun polymer nanofibers interlaminar toughening can be achieved.
b.) Aim of research: The aim of the research is to develop electrospun nanofibers reinforced composites and to investigate and model their damage process, fatigue and fracture behavior.
c.) Tasks, main items, necessary time:
• Literature review in the field of electrospun nanofibers and related composites, modelling the damage process of fiber mats and composites, composite mechanics focusing on fracture, nanofiber’s mechanical properties and related test methods (approx. 9 month).
• Fabrication of continuous, uniform diameter, aligned and randomly aligned nanofibers using needleless electrospinning technique and apply them in nanocomposites and self-reinforced nanocomposites (approx. 12 month)
• Investigate the fatigue, the fracture and interlaminar damage process of aligned and random direction electrospun nanofiber reinforced composites and self-reinforced composites. (approx. 15 month).
• Analysis, comparative study and modelling the thermal effects on the fatigue and fracture process of electrospun nanofiber reinforced composites (approx. 12 month).
d.) Required equipment: The necessary equipment is available at the laboratory of the Department; besides some test devices are to be developed and built as a part of the research.
e.) Expected scientific results: Elaboration of a novel nanocomposites reinforced with nanofiber webs and yarns, improved performance and deeper understanding of nanofibers and composite materials, electrospinning process and nanofibers composite fatigue and fracture models.
f.) References:
• Molnár K., Vas L.M.: Electrospun Composite Nanofibers and Polymer Composites. In: Bhattacharyya D., Fakirov S. (eds.): Synthetic Polymer-Polymer Composites. Carl Hanser Verlag, Münich, 2012. pp. 301-352.
• Molnár K., Nagy Zs.K.: Corona-electrospinning: Needleless method for high-throughput continuous nanofiber production. European Polymer Journal, 74:(1) pp. 279-286. (2016).
Required language skills: english Number of students who can be accepted: 1
Deadline for application: 2018-10-19
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
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