ON THE CALCULATION OF COD FROM THE CLIP-GAUGE DISPLACEMENT IN CT AND BEND SPECIMENS

被引：17

作者：

KOLEDNIK, O

机构：

[1] Akad der Wissenschaften, Leoben, Austria, Akad der Wissenschaften, Leoben, Austria

来源：

ENGINEERING FRACTURE MECHANICS | 1988年 / 29卷 / 02期

关键词：

MECHANICAL VARIABLES MEASUREMENT - Distance - PLASTICITY - Evaluation;

D O I：

10.1016/0013-7944(88)90045-8

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

It is very difficult to determine experimentally the crack-tip-opening displacement (COD) near the midsection of a specimen. Dawes' formula to calculate COD from the plastic component of the clip-gage displacement is physically inconsistent and may yield to unconservative values of the critical COD. Therefore, a new estimation procedure is proposed which is derived theoretically and verified experimentally using tests where COD was measured directly. For the derivation of the procedure it was necessary to estimate theoretically the size of the plastic rotational factor during different stages of loading.

引用

页码：173 / 188

页数：16

共 20 条

[1]

Bucci R.J., 1972, ASTM SPEC TECH PUBL, V514, P40

[2]

Daves MG, 1979, ASTM STP, P307

[3]

FIELDS A, 1987, COMMUNICATION

[4] STUDY OF COD AND CRACK INITIATION BY A REPLICATION TECHNIQUE [J].