A STRENGTH EVALUATION METHOD OF A SHARPLY NOTCHED STRUCTURE BY A NEW PARAMETER, THE EQUIVALENT STRESS INTENSITY FACTOR

被引：30

作者：

KIHARA, S

YOSHII, A

机构：

[1] Sumitomo Heavy Industries Ltd, Niihama

来源：

JSME INTERNATIONAL JOURNAL SERIES I-SOLID MECHANICS STRENGTH OF MATERIALS | 1991年 / 34卷 / 01期

关键词：

FATIGUE; BRITTLE FRACTURE; STRESS INTENSITY FACTOR; SHARP NOTCH; EQUIVALENT STRESS INTENSITY FACTOR; CRACK INITIATION; STRENGTH EVALUATION; BOUNDARY ELEMENT METHOD;

D O I：

10.1299/jsmea1988.34.1_70

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A new method is proposed to evaluate the strength of a sharply notched structure with a large notch angle. A new parameter, K(e) which is to be called the equivalent stress intensity factor and which prescribes the singularity of stress distribution near the notch tip, is defined to evaluate the effect of a sharp notch on the fatigue and static strength. This method makes it possible to predict the strength of a notched structure by using the well-known parameters DELTA-K(th) and K(IC). Fatigue tests of HT60 (600 MPa-class high-strength steel) and SS41 (400 MPa-class mild steel) and a brittle fracture test of an acrylic plate were conducted, and the applicability of the parameter was verified.

引用

页码：70 / 75

页数：6