## 3 Results and Discussion
### Fragmentation Resistance Test Results
The changes of resistance to FSP.22 fragment between the developed HSC composites with different thicknesses of the ceramic element are therefore related to differences in parameters such as Young's modulus and Vickers microhardness of ceramic fittings. It can be clearly stated that with the increase of values obtained for these two parameters, the ballistic properties of the tested composite system are improved. Similar relationships resulted also from studies conducted by [PERSON] et al. [52], [PERSON] et al. [55], or [PERSON] et al. [56]. In addition, it was determined that there are no differences in the obtained V50 ballistic protection limit values between composites containing ceramic elements of identical thickness (3.5 \(\pm\) 0.2) mm differing in the presence of reinforcement layers in the form of Poron(r)XRDMA (Polting Foam Sp. zo.o, Gliwice, Poland) and Twaron(r)CT612 (Teijin, Wuppertal, Germany) sheets. Therefore, it can be concluded that the reinforcement layers do not affect the fragmentation resistance properties of the developed composite. These layers are intended to limit the generation of secondary fragments from the ceramic fragments formed during the impact of the fragment or bullet on the sample and to contribute to the \"stabilization\" of the ceramic layer, understood as limiting the process of detachment of adjacent ceramic fragments under the impact of the fragment. At the same time, there is no correlation between the type of silicone elastomer used and its physical and mechanical properties (Table 1) and the obtained value of the V50 ballistic protection limit due to too minor differences between individual values of this parameter. Therefore, the lifetime as well as decomposition, viscosity, and price of the silicone elastomer for the sample preparation processes of hybrid silicone-ceramic  
Figure 4: Hybrid ceramic-silicone composites after ballistic tests. composites will play a role in the selection of the silicone elastomer, which may determine the speed and profitability of future production methods. On the basis of the results obtained, it can be indicated that in the case of HSC composites, the elements responsible for the absorption of impact energy at high velocities (in the range of 600-1500 m/s) are ceramics and soft ballistic inserts made of Twaron(r)CT612 (Teijin, Wuppertal, Germany). The use of silicone increases the value of the ballistic protection limit by about 100 m/s in relation to the V50 values obtained for the Twaron(r)CT612-based (Teijin, Wuppertal, Germany) soft ballistic inserts, which is about 14%. The analysis of the literature data allowed to determine that in the case of soft ballistic inserts, four categories of factors influencing the performance and ballistic resistance of the package can be distinguished. These are: material parameters, constructional parameters, parameters of the fragment and/or bullet used for testing, and parameters of the ballistic test carried out [57; 58]. The material parameters in the case of soft ballistic inserts are mainly: density of the fibers, their tensile strength, and friction occurring between the fibers. Structural parameters include: twist of the yarn, weave, thread density, number of layers, etc. The parameters associated with the bullets, such as weight, shape, and speed, and the parameters associated with testing, such as the location of the shot, the number of shots, the angle at which the bullet hits the target, and boundary conditions can significantly affect ballistic performance. However, an in-depth discussion on bullet parameters and testing method is not the subject of this study. In the case of material and design parameters of soft ballistic inserts, it has been observed that during an impact of a fragment or high speed bullet, its energy is absorbed by mechanisms such as yarn decrimping, fiber and yarn extension, yarn and fiberpull-out, and yarn rupture [4; 59].