AN INVESTIGATION OF NOTCHING TECHNIQUES FOR FRACTURE-TOUGHNESS MEASUREMENT IN AMORPHOUS NYLON

被引：2

作者：

CROUCH, BA ^{[1
]}

BENDER, RG ^{[1
]}

WILLIAMS, JG ^{[1
]}

机构：

[1] UNIV LONDON IMPERIAL COLL SCI & TECHNOL,DEPT MECH ENGN,LONDON SW7 2AZ,ENGLAND

来源：

ENGINEERING FRACTURE MECHANICS | 1992年 / 41卷 / 01期

关键词：

D O I：

10.1016/0013-7944(92)90094-U

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The effect of notch preparation on the apparent impact fracture toughness of an amorphous nylon is investigated. Results on straight slot or chevron pre-notches and compressed, tapped, or drawn razor notches are described. Crack curvature can have a significant effect on the apparent toughness and this is a limitation on the use of tapped razor notches and chevron pre-notches. A correction of the stress intensity calculation for crack curvature is discussed. After correction there appears to be little difference between tapped, drawn or compression notched data. Annealing and side-grooving are also considered as ways of removing surface residual stress and, therefore, reducing crack front curvature. Side-grooving complicates the calculation of toughness and a correction is required.

引用

页码：49 / 57

页数：9