中文摘要：

通过ANSYS／LS—DYNA有限元软件对大理岩动态劈裂拉伸实验过程进行数值模拟，分别利用传统圆柱形冲锤、异形冲锤和在输入杆撞击端加波形整形器后再用传统圆柱形冲锤冲击的方式进行模拟，分析了动栽荷下大理岩的破坏机理。研究试样在不同应变率下的破坏应变，讨论了冲锤以不同的冲击速度冲击与入射杆的轴向最大应力、试样的破坏时刻和破坏应变的关系。研究结果表明：在动态冲击作用下，随着冲击速度的增大，大理岩材料应变率呈增大趋势，而破坏时间和破坏应变呈减小趋势。

英文摘要：

The dynamic splitting tension test of the marble was simulated by the FEM software ANSYS/LS-DYNA. Marble failure mechanism under dynamic loading was analyzed respectively through using traditional cylindrical hammer, profiled hammer and traditional cylindrical hammer with pulse shaper attached to the input rod impact segment. The relationships between different hammer impact speed with the maximum axial stress of incident bar, destruction moment and failure strain of testing sample, as well as the failure strain with different strain rates, were studied. The results indicated that under the effect of dynamic impact, along with the impact velocity increases, the strain rate of marble material showed a trend of increase,while the time to failure and failure strain showed a trend of decreases.