ON THE PHYSICAL MEANING OF THE J-DELTA-A-CURVES

被引：42

作者：

KOLEDNIK, O

机构：

[1] Österreichische Akademie der Wissenschaften, Erich-Schmid-Institut für Festkörperphysik

来源：

ENGINEERING FRACTURE MECHANICS | 1991年 / 38卷 / 06期

关键词：

D O I：

10.1016/0013-7944(91)90092-F

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

In elastic-plastic fracture mechanics often so-called J-R-curves are recorded to describe a material's resistance against crack extension. In this paper the physical meaning of these curves is worked out. The starting point is the energy balance during quasi-static crack-growth. From this the difference between crack-initiation toughness and crack-growth toughness is derived. The J-DELTA-a-curves are no resistance curves in the Griffith sense. The real crack-growth resistance, R, is reflected by the slope of the curves. A formula is given to estimate R for deeply notched bend or CT-specimens.

引用

页码：403 / 412

页数：10

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