Dynamic full field measurements of crack tip temperatures

被引：59

作者：

Guduru, PR

Zehnder, AT

Rosakis, AJ

Ravichandran, G

机构：

[1] CALTECH, Grad Aeronaut Labs, Pasadena, CA 91125 USA

[2] Cornell Univ, Dept Theoret & Appl Mech, Ithaca, NY 14853 USA

来源：

ENGINEERING FRACTURE MECHANICS | 2001年 / 68卷 / 14期

关键词：

infrared temperature measurement; dynamic fracture; crack tip temperature; J integral;

D O I：

10.1016/S0013-7944(01)00045-5

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper presents a detailed investigation of the evolution of temperature field at the tip of a stationary crack subjected to dynamic loading in two different types of steels. A high speed two-dimensional infrared camera was used to image the temperature fields at the crack tips. In a high strength maraging steel, the thermograms reveal the development of plastic zone and the process of crack initiation and propagation. In ductile HY100 steel, the thermograms are used to estimate the evolution of J integral and its critical value at crack initiation. The temperature images are also used to investigate the dominance of HRR field around the crack tip. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1535 / 1556

页数：22

共 39 条

[1] A finite element study of the effects of material characteristics and crack tip constraint on dynamic ductile fracture initiation [J].