A NEW METHOD FOR MEASURING DYNAMIC FRACTURE-TOUGHNESS OF ROCK

被引：29

作者：

TANG, CN

XU, XH

机构：

[1] Northeast University of Technology, Shenyang

来源：

ENGINEERING FRACTURE MECHANICS | 1990年 / 35卷 / 4-5期

关键词：

D O I：

10.1016/0013-7944(90)90162-A

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

An experimental technique for studying dynamic fracture toughness under stress wave loading is described in this paper. With a Bar Impact Testing Machine, the three point bending specimen was fractured under impact loading, the loading rate KI being approximately 106N/mm 3 2 · s. An accurate measurement of load and groove-opening displacement as function of time was made by applying a transient waveform storage, and the load applied on the specimen and the groove-opening displacement can be determined from the displacement rate according to which the dynamic fracture toughness KId was obtained. The typical load-displacement curve of a marble specimen with size of 180 × 40 × 40 is given in the paper. © 1990.

引用

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