Electrical laser alarm system for controlling the buckling failure of 304 stainless steel under shot peening treatmen

• Published in: Engineering and Technology Journal Vol. 35; no. 5A; pp. 516 - 524
• Main Authors: al-Alkawi, Husayn Jasim Muhammad, Husayn, Aid Ibrahim, Fattah, Fikrat Abd al-Karim
• Format: Journal Article
• Language: English
• Published: Baghdad, Iraq University of Technology 2017
• ISSN: 1681-6900; 2412-0758

The purpose of this paper is to design and manufacture the electrical
laser alarm system to assess the buckling failure of 304 stainless steel column and
to estimate the critical buckling load (Pcr) under increasing compressive load
without shot peening (WSP) and with shot peening (SP). The evaluation of the
critical buckling load (Pcr ) was done experimentally and theoretically for long
and intermediate pinned – fixed columns. The experimental results revaled that
25 min. shot peening time (SPT) improved the critical buckling load (Pcr ) by
13.3% - 15.39% improvement percentage (IP) for long columns while 18.51% -
23.07% for intermediates. Also it was observed that reducing the effective length
(Leff ) resulting in increasing the effect of 25 min. shot peening time (SPT) and
kept constant when effective length (Leff ) larger than 200mm. The difference
percentage (DP) obtained from theoretically and experimentally comparison
between the critical buckling load (Pcr ) was 33.33 to 41.18 for without shot
peening and 23.07 to 33.34 for 25 min. shot peening time (SPT) based on Euler
and Johnson theories for both long and intermediate columns. Also it was revaled
that increasing the slenderness ratio (S.R) reducing the critical buckling load
(Pcr) for both columns and both conditions of testing without shot peening (WSP)
and shot peening (SP)