MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
 
Fracture Toughness for Brittle Fracture of Elastic and Plastic Materials
Yoshikazu Tanabe
Author information
JOURNALS FREE ACCESS

2013 Volume 54 Issue 3 Pages 314-318

Details
Abstract

The crack energy density causes a new expression of fracture toughness for brittle fracture, together with the concept of Barenblatt’s characteristic distance dc of cohesive zone at the edge of the crack. The Griffith’s formula for fracture toughness is modified by the ratio of σTT, which σT is the true fracture stress and ΣT the maximum strength of the material obtainable by ordinary processing. The fracture toughness of elastic-plastic material, KIc* for brittle fracture is described by the product of σT and the root of the observed absorption energy by Charpy impact test corrected for instrumental effect, \sqrt\smashIcpcorrected\mathstrut . The characteristic distance dc depends linearly on the released elastic energy, which is the physical basis of above-mentioned estimation formula.

Information related to the author
© 2013 The Japan Institute of Metals and Materials
Previous article Next article
feedback
Top