Thesis supervisor: Tibor Szalay
Location of studies (in Hungarian): Department of Manufacturing Science and Engineering Abbreviation of location of studies: GTT
Description of the research topic:
a.) Internationally, automation of composite processing is a very important topic, particularly for the automotive and aviation sectors, and there is a strong interest in how low-volume niche manufacturing can be cost-effectively automated. This includes local companies manufacturing marine, sporting, and aerospace products. This project has a focus on the effect of defects and imperfections on damage initiation and propagation.
b.) The general aim of this PhD is to understand the relationships between manufacturing related variability and the resulting performance and durability of composite structures. The specific focus is on automated manufacturing processes (such as robotic tape laying, filament winding, automated RTM processes and others), and understanding how variability of factors such as gaps between tape edges, tow and fabric mis-alignment, variations in fibre and tow weight etc. affect damage initiation (e.g. micro and macro cracks) and propagation (e.g. delamination, fatigue). Outcomes from this research will enable developers of automated manufacturing equipment to determine what tolerances their processing equipment and input materials need to achieve to ensure required product performance and reliability. The project may include both analytical and numerical modelling, along with experimental validation.
c.) Review of the relevant publication about the topic of this research, composing a survey, deriving the most important focuses of the future research (8 months). Investigation of the main sources of variability and the size of the deviations (8 months). Experimental investigation of the effect of the identified variations, measuring the effects in the case of different manufacturing processes (using varied parameters, and different composites – 16 months). Defining and deducing the correlation or a model that make possible to design and estimate the durability of the composite parts (12 months). Verification and validation of the model (4 months).
d.) All the necessary testing and other equipment are available at the laboratory of the Department.
e.) This project has a focus on the effect of defects and imperfections on damage initiation and propagation. This project can developed new modelling and experimental techniques that are likely to be of value. Automation of composite processing is a new area, which may be planned to expand into, and this would be one of the first projects on this topic.
f.)
1. Biró István, Szalay Tibor: „Extension of empirical specific cutting force model for the process of fine chip-removing milling”, INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY on-line first: Paper 10.1007/s00170-016-8957-x pp. 1-9. (2016)
2. Czampa Miklós, Biró István, Szalay Tibor: A novel machinability test for determining the cutting behaviour of iron-based, carbon-containing and copper-containing powder metallurgy steels (PMS) INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY on-line first: Paper 10.1007/s00170-016-9313-x. 1-13 p. (2016)
3. Bíró István, Czampa Miklós, Szalay Tibor: „Experimental Model for the Main Cutting Force in Face Milling of a High Strength Structural Steel” PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING 59:(1) pp. 16-22. (2015)
4. Tibor Szalay, Karali Patra, Balázs Zsolt Farkas: „Experimental Investigation of Tool Breakage in Micro Drilling of EN AW- 5083 aluminium” KEY ENGINEERING MATERIALS 581: pp. 119-124. (2014)
5. Tukora Balázs, Szalay Tibor: „Real-time determination of cutting force coefficients without cutting geometry restriction” INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE 51: pp. 871-879. (2011)
Required language skills: angol Number of students who can be accepted: 1
Deadline for application: 2017-10-19
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).
Login
