用实验方法研究水泥石动态断裂韧性  

Study on dynamic fracture toughness of cement rock by experimental method

作　　者：王通[1] 王强[2] 于长滨[2] 王祥林[3] 

机构地区：[1]黑龙江省林业设计研究院建筑环境艺术设计中心,黑龙江哈尔滨150080 [2]黑龙江大学物理科学与技术学院,黑龙江哈尔滨150080 [3]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《地震工程与工程振动》2006年第4期250-254,共5页Earthquake Engineering and Engineering Dynamics

基　　金：黑龙江省自然科学基金项目(A9856)

摘　　要：为了减轻射流侵彻对水泥环的破坏,改善界面的密封胶结性能,必须对现有的水泥石进行改性研究。根据超混复合材料的原理,我们在水泥石的配比中增加几种填料,通过填料影响改变水泥石的动态断裂韧性。将水泥石制成短棒试件,用分段式Hopk inson压杆对几种改性配方的水泥石的动态断裂韧性进行实验测定,给出了部分实验结果。采用反射式动态焦散线方法,对六种水泥石材料的动态断裂韧性进行了实验研究,给出了实验结果。并比较了短棒实验和动态焦散线法测量动态断裂韧性的结果,两者吻合较好。研究表明:纤维增强是提高水泥石抗冲击性能的有效途径。In order to reduce the destroying of the cumulative flow erosion of cement ring and improve the sealed cementing property at the interface, it is necessary to research the modification of the cement rock available. According to the principle of supercomposite materials,we add various fillers to the ingredients of cement rock. Dynamic fracture toughness of the cement rock is changed by fillers and the cement rock is made into a short rod specimen. The experiment is carried out to test the dynamic fracture toughness of the cement rock with different ingredients by using the split Hopkinson pressure bar and some experimental results are given. The dynamic fracture toughness of six modified cement rock specimens is studied by reflective dynamic caustic. The results of short rod experiment of dynamic fracture toughness correspond very well to the data of dynamic caustics. The research indicates that the fiber reinforcement is an effective way to improve the impact resistance of cement rock.

关 键 词：水泥石 短棒试件 断裂韧性 

分 类 号：O348.1[理学—固体力学]