Risteski, Sanja (2018) Design and performance of clothes for special purpose. PhD thesis, Goce Delcev University, Stip.
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Abstract
Subject of this doctoral dissertation is the research for design of clothes for special purpose. Selection of textile materials, suitable for making clothes for special purpose in industrial production conditions was made. Because of their favorable technical characteristics, availability and cost, a polyamide fabric was selected as an outer garment material, and other types of inner materials were also used for adjustment to the intended purpose. Optitex Pattern Design Software (PDS) and Optitex CutPlan software package were used for the construction of the new contemporary model of a protective vest, and for making the cutting layouts. With use of this software, cutting layouts and construction parts were made with high accuracy and with the maximum utilization of the material. On the basis of the obtained cutting layouts, a new model of a protective vest was made. The vest construction includes pockets for soft and hard ballistic protection, modular parts, as well as a system for quick removal from the body constructed through cables, that are inserted into special compartments as modular part of the basic construction
Mechanical properties and ballistic resistance of the materials used for soft and hard protection of the vest were also examined. A comparison of two types of soft protection materials is made: aramid fiber fabric and unidirectional tape based on high-performance polyethylene fibers. It has been found that both materials provide a level of protection III-A according to the standard NIJ 0101.06 which is the highest level of protection for protective vests. The difference is only in the weight of the soft protective part and the traumatological effect. Unidirectional tapes provide the same level of protection to a lower weight and therefore they are more applicable and are superior to textile materials that are two-way directional. But in applications where price is a priority, two-way directional composites have an advantage. The results of the traumatological effect in two-way directional composites showed less surface and greater depth than the unidirectional ones where a larger surface was affected, but with less deformation on the back side.
The hard composite protective plate is obtained from unidirectional tapes based on high-performance polyethylene fibers with compression extrusion and provides a level of protection III according to standard NIJ 0101.06. An investigation of the ballistic strength of the influence of pressing pressure on the composite plates was performed. It was found that by increasing the pressing pressure were obtained protective composite plates with greater ballistic strength and lower traumatological effect.
New model of protective vest meets the requirements for advanced design and also provide functionality and comfort. According to its performance, this model satisfies the requirements for ballistic resistance from the highest level of protection for the protective vest.
Key Words: polyamide fabric, aramide fibers, high performance polyethylene fibers, protective vest, ballistic protection, traumatological effect.
| Item Type: | Thesis (PhD) |
|---|---|
| Subjects: | Engineering and Technology > Materials engineering |
| Divisions: | Faculty of Technology |
| Depositing User: | Sladzana Dimiskov |
| Date Deposited: | 26 May 2018 08:19 |
| Last Modified: | 28 May 2018 07:33 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/20047 |
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