Transactions of the JSME (in Japanese)
Online ISSN : 2187-9761
ISSN-L : 2187-9761
Solid Mechanics and Materials Engineering
Prediction of fracture toughness by application of stress distribution T-scaling method under compressive residual stress
Kenichi ISHIHARAToshinori SHIMOIKEToshiyuki MESHII
Author information
JOURNAL FREE ACCESS

2017 Volume 83 Issue 855 Pages 17-00323

Details
Abstract

The fracture toughness Jc of the material in the ductile to brittle transition temperature (DBTT) region shows test specimen thickness (TST) effect and temperature dependence, and apparently increases when compressive residual stress is applied. In this paper, as TST effect and temperature dependence, the fact that Jc apparently increases due to compressive residual stress is attributable to the loss in the one-to-one correspondence between J and the crack-tip stress distribution, and then, the fracture prediction of the specimen with compressive residual stress was performed using the T-scaling method proposed by the authors, and its validity was confirmed for high strength steel of 780 MPa class and 0.45 % carbon steel JIS S45C. In addition, it was suggested that the minimum of Jc with compressive residual stress can be predicted by requiring only the tensile test.

Content from these authors
© 2017 The Japan Society of Mechanical Engineers
Previous article Next article
feedback
Top