Open AccessImpact of AD995 alumina rods
Author(s) -
L.C. Chhabildas,
Furnish,
William D. Reinhart,
D. E. Grady
Publication year - 1997
Language(s) - English
Resource type - Reports
DOI - 10.2172/541910
Subject(s) - rod , materials science , bar (unit) , stress (linguistics) , shock (circulatory) , composite material , pulse (music) , interferometry , split hopkinson pressure bar , cylinder stress , strain rate , optics , geology , physics , medicine , linguistics , philosophy , alternative medicine , pathology , detector , oceanography , ultimate tensile strength
Gas guns and velocity interferometric techniques have been used to determine the loading behavior of an AD995 alumina rod 19 mm in diameter by 75 mm and 150 mm long, respectively. Graded-density materials were used to impact both bare and sleeved alumina rods while the velocity interferometer was used to monitor the axial-velocity of the free end of the rods. Results of these experiments demonstrate that (1) a time-dependent stress pulse generated during impact allows an efficient transition from the initial uniaxial strain loading to a uniaxial stress state as the stress pulse propagates through the rod, and (2) the intermediate loading rates obtained in this configuration lie between split Hopkinson bar and shock-loading techniques