Author, institution: Julija Krauledaitė, Kaunas University of Technology
Science area, field of science: Technological Sciences, Materials Engineering (T 008)
Scientific Supervisor: Assoc. Prof. Dr. Kristina ANCUTIENĖ (Kaunas University of Technology, Technological Sciences, Materials Engineering, T 008).
Dissertation Defense Board of Materials Engineering Science Field:
Prof. Dr. Daiva MIKUČIONIENĖ (Kaunas University of Technology, Technological
Sciences, Materials Engineering, T 008) – chairperson;
Prof. Dr. Virginija DAUKANTIENĖ (Kaunas University of Technology,
Technological Sciences, Materials Engineering, T 008);
Prof. Hab. Dr. Małgorzata MATUSIAK (Lodz University of Technology, Poland,
Technological Sciences, Materials Engineering, T 008);
Prof. Dr. Rimvydas MILAŠIUS (Kaunas University of Technology, Technological
Sciences, Materials Engineering, T 008);
Dr. Sandra VARNAITĖ-ŽURAVLIOVA (State Research Institute Center for
Physical Sciences and Technology, Technological Sciences, Materials Engineering,
T 008).
The public defense of the dissertation will take place at the Rectorate Hall at Kaunas University of Technology (K. Donelaičio 73-402, LT-44249 Kaunas, Lithuania).
Annotation: In the doctoral thesis, the influence of fiber composition on the resistance to mechanical risks of 3D weft-knitted fabrics (cutting, puncture, abrasion, and tearing) is investigated. 3D weft-knitted fabrics are made of outer, inner and connecting layers. For the design of 3D weft-knitted fabrics, high-molecular-weight polyethylene (HMWPE), steel wire, basalt, which are used to improve the mechanical resistance of the 3D weft-knitted fabric were selected, polyester yarns were used in the inner layer to provide the knitted fabric with better wearing comfort and the possibility of direct contact with the skin, and polyamide yarns were used to connect the outer and inner layers. Different groups of 3D weft-knitted fabrics, which are intended for direct contact with the skin and in cases with no direct contact, were designed for the research. The mathematical models for statistically significant research results were composed in the doctoral thesis, which allow to predict the trends of resistance to the mechanical impact of 3D weft-knitted fabrics, when different contents of HMWPE, basalt and steel wire are used only in the outer or in the outer and inner layers. It has been established that the structure of 3D weft-knitted fabric with different content of HMWPE, basalt and steel wire ensure the highest degree of resistance to mechanical impact in accordance with EN 388. Based on the results of experimental studies, the recommendations for the design of 3D weft-knitted fabrics for protection against mechanical risks are provided. The researches presented in the doctoral thesis significantly contribute to the wider application of the 3D weft-knitted structure and basalt in personal protective equipment (PPE) against the mechanical risks.
