Analysis of the impact behavior of personal protections manufactured with ultra high molecular weight poly-ethylene (uhmwpe)
- Autores: Jairo Peinado Seligrat
- Directores de la Tesis: Carlos Santiuste Romero (dir. tes.)
- Lectura: En la Universidad Carlos III de Madrid ( España ) en 2022
- Idioma: inglés
- Tribunal Calificador de la Tesis: Eugenio Giner Maravilla (presid.), José Antonio Loya Lorenzo (secret.), Xavier Soldani (voc.)
- Programa de doctorado: Programa de Doctorado en Ingeniería Mecánica y de Organización Industrial por la Universidad Carlos III de Madrid
- Materias:
- Enlaces
- Tesis en acceso abierto en: e-Archivo
- Resumen
Nowadays, practically all research on UHMWPE under high velocity impact is based on one material, usually the HB26, which is extensively studied, and only a few based on soft ballistics such as SB51. In this work, several soft ballistic UHMWPE materials are used and the combinations for these materials are also investigated considering high-velocity impact of a steel sphere of 7.5mm in diameter revealing that, when the best ballistic material at the rear face, the worst performance material at the front face and the intermediate in the middle, they give to optimal solutions for ballistic packages enhancing their performance and reducing the manufacturing costs.
The analysis of the list of combinations for the different UHMWPE materials were performed through a simple Finite Element Method model with only three parameters, and only 2 hours per simulation required. Furthermore, in a subsequent step, an Artificial Neural Network was calibrated using the results obtained from FEM simulations for a total of 75 cases, 50 to analyze the impact on the layers’ position, and 25 to analyze the impact on the weight ratio, both studies combining the three materials, and validated with 6 and 7 additional cases respectively with an error for the FEM model lower than 10% at high velocities, and considering the ANN models, 0.89% for the stacking position, and 2.37% for the weight ratio.
This tool developed under the condition of spherical projectiles can be enhanced with real threats such Fragment-Simulating Projectiles (FSP) or deformable projectiles, and with other more complex subroutines to account for brittle damage, shock impedance or plasticity in further studies.
