PERFORATION OF CONCRETE SLABS WITH 48-MPA (7-KSI) AND 140-MPA (20-KSI) UNCONFINED COMPRESSIVE STRENGTHS
PERFORATION OF CONCRETE SLABS WITH 48-MPA (7-KSI) AND 140-MPA (20-KSI) UNCONFINED COMPRESSIVE STRENGTHS
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DOI：
10.1016/0734-743x(92)90282-x
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发表时间：
1992-01-01
影响因子：
5.1
通讯作者：
EHRGOTT, JQ
中科院分区：
文献类型：
--
作者：
HANCHAK, SJ;FORRESTAL, MJ;EHRGOTT, JQ
我们进行了穿孔实验与25.4毫米直径，0.50公斤，3.0口径半径头部，拱形鼻杆和178毫米厚的混凝土板与48 MPa（7 ksi）和140 MPa（20 ksi）的无侧限抗压强度。 对于300和1100 m/s之间的冲击速度，我们的数据表明，剩余速度为140 MPa的混凝土是小于20%，低于48 MPa的混凝土。 因此，对于无侧限抗压强度增加三倍，我们测量到弹道穿孔性能的相对较小的变化。 我们定性地解释了这些结果与试验后的观察和三轴材料实验与48和140 MPa的混凝土材料。
We conducted perforation experiments with 25.4-mm diameter, 0.50-kg, 3.0-caliberradius-head, ogival-nose rods and 178-mm-thick concrete slabs with 48 MPa (7 ksi) and 140 MPa (20 ksi) unconfined compressive strengths. For impact velocities between 300 and 1100 m/s, our data showed that residual velocities for the 140 MPa concrete were less than 20% lower than that for the 48 MPa concrete. Thus, for a factor of three increase in unconfined compressive strength, we measured relatively minor changes in ballistic perforation performance. We explained these results qualitatively with post-test observations and triaxial material experiments with the 48 and 140 MPa concrete materials.