Effect of stress pulse shape on the dynamic fracture of soda-lime glass

0550930 - ÚT 2022 RIV ES eng C - Konferenční příspěvek (zahraniční konf.)
Buchar, Jaroslav - Trnka, Jan
Effect of stress pulse shape on the dynamic fracture of soda-lime glass.
DYMAT 2021 : 13th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading. Vol. 250. Madrid: EPJ Web of Conferences, 2021 - (Gálvez Díaz-Rubio, F.; Cendón Franco, D.), č. článku 06001. Non Metallic Materials, 250. E-ISSN 2100-014X.
[International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading /13./. Madrid (ES), 20.09.2021-24.09.2021]
Grant CEP: GA MŠMT(CZ) EF15_003/0000493
Institucionální podpora: RVO:61388998
Klíčová slova: dynamic loading * Brazilian tests * Hopkinson split pressure bar (HSPB) technique
Obor OECD: Materials engineering
https://www.epj-conferences.org/articles/epjconf/abs/2021/04/epjconf_dymat2021_06001/epjconf_dymat2021_06001.html

The goal of this paper is to evaluate the tensile strength and fracture behavior of the soda lime glass under static and dynamic loading using Brazilian tests. The evaluation of the static tensile strength was performed using the universal testing machine, the fracture behavior under dynamic loading was studied using the Hopkinson Split Pressure Bar (HSPB) Technique. The dynamic loading is realized using the stress pulses of the different shape. In order to obtain the different loading stress pulses impact strikes made from four different materials (Steel, Teflon, Beech, and Polymer) were used. The high-speed camera in both static and dynamic tests was used to obtain some detail view on the failure process of specimens. Experimental results showed that the dynamic tensile strength was at least three times higher than the static one. The initiation of the dynamic fracture occurs when some parameters of the loading stress pulse reaches critical values. These parameters are independent on the stress pulse shape.

Trvalý link: http://hdl.handle.net/11104/0327280