Jk. Gran et Dj. Frew, IN-TARGET RADIAL STRESS MEASUREMENTS FROM PENETRATION EXPERIMENTS INTO CONCRETE BY OGIVE-NOSE STEEL PROJECTILES, International journal of impact engineering, 19(8), 1997, pp. 715-726
We conducted three penetration experiments of a hardened 4340 steel pr
ojectile with a length-to-diameter ratio of 7 into concrete targets ha
ving an unconfined compressive strength of 43 MPa. The targets were ea
ch cast with six flatpack stress gages oriented to measure radial stre
ss and positioned at various depths and radii from the penetration pat
h. The experiments provide researchers with quality data that can be u
sed to validate first-principle codes and to better understand the pen
etration mechanics in brittle, porous materials. Additional tests are
recommended at other striking velocities and gage locations to further
quantify stress within concrete targets. (C) 1997 Elsevier Science Lt
d.