中文摘要：

基于剪切波跟踪技术（SWT）,对岩盐、水泥砂浆石复合材料进行压剪联合冲击试验,通过冲击剪切性能来揭示脆性材料的损伤状态。在冲击损伤阶段,脆性材料的冲击压缩性能规律不明显,但剪切方面表现出随损伤程度加深,剪切波波速和剪切强度明显降低的规律。比较有法向应力和无法向应力作用时的剪切强度,当无法向应力作用时,材料损伤后剪切强度随损伤程度的加深逐步降为0,而有法向应力作用时,剪切强度有随损伤程度的加深逐步降低的趋势,但存在一定的波动。这表明,采用剪切波,尤其是卸载剪切波来探测岩石内部动态损伤非常有效。

英文摘要：

Investigation of impact responses for rock-like brittle materials nowadays is mainly focused on the experiments of compression impacting.However,the impact-induced damage behaviors of rocks can not be fully revealed only by the compression process for the special properties of rock-like materials.Based on a so-called transversal shear wave tracing technique（SWT） proposed by Professor Z.P.TANG,series of experiments for rock salt and cementitious composites subjected to shear and compression combined impact loadings are conducted.The transversal impact responses are used to reveal the damage property of brittle materials.When the brittle material is in the damage state,the rule of the compression property is not evident for the scattered distribution in material features;howevert,he shear responses take on good tendencyt：he wave velocity and the strength of shear wave decrease evidently with the increase of damage degree in materials.When comparing the shear strength for sample with normal stress to that without normal stress,the latter shows that the strength of shear wave decreases evidently with the increase of damage degree,while the former shows a similar tendency but with great oscillations at local.It can be concluded that the transversal wave,especially the unloading transversal wave,is especially important for the dynamic damage investigation of brittle materials.