Mixed-mode fatigue crack growth thresholds: A personal historical review of work at the National Engineering Laboratory, 1975-1989

被引：17

作者：

Pook, L. P.

机构：

[1] 21 Woodside Road, Sevenoaks

来源：

ENGINEERING FRACTURE MECHANICS | 2018年 / 187卷

关键词：

Mixed mode; Fatigue crack growth thresholds; Lower and upper bounds; Stress intensity factors; Corner point singularities; MILD-STEEL; BEHAVIOR;

D O I：

10.1016/j.engfracmech.2017.10.028

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Mixed mode fatigue crack growth thresholds in metals were investigated at the National Engineering Laboratory from 1975 to 1989. Re-assessment confirmed that thresholds are determined by the formation and growth of mode I branch cracks at the tip of the initial crack. Lower and upper bounds can be defined, and used for design purposes. For mixed mode I and II loading, the presence of corner points and hence corner point singularities, encourages mode I branch crack formation. Transforming a mixed mode crack into an equivalent mode I crack, as is done some design standards, is not always satisfactory. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：115 / 141

页数：27