Author(s):
1. Boban Andjelković, Faculty of Mechanical Engineering in Niš, Serbia
2. Dragan Milčić, Faculty of Mechanical Engineering in Niš, Serbia
3. Biljana Djordjevic, Masinski fakultet, Serbia
4. Miodrag Milčić, Faculty of Mechanical Engineering in Niš, Serbia
5. Nataša Jovanović, Faculty of Mechanical Engineering in Niš, Serbia

Abstract:
For the determination of SN curves of friction stir welded joints sophisticated measuring systems are required. The parameters that are measured are cumulative numbers change loads, the moments of specimen fractures and frequency of variable load. In order to reduce the duration of the tests, a special design for the simultaneous testing of a large number of specimens was developed. Specimens are arranged in a series of the console loaded with different masses at each end. For the generation of harmonic oscillations of the console, high-frequency electrodynamic machine (shaker) Sentek Dynamics is used. Because the testing tool is a package of 12 samples rather than one sample, it is necessary to detect the moment of fracture of each sample. The use of conventional measuring equipment is extremely expensive. The probability of damage of equipment is large. For these reasons, an inexpensive, simple, reliable, and autonomous measuring system was developed with a large measuring potential based on ARDUINO platform.

Key words:
SN curves,friction stir welding,autonomous measuring system

Thematic field:
Mechanics and Design

Date of abstract submission:
27.02.2017.

Conference:
13th International Conference on Accomplishments in Mechanical and Industrial Engineering